Import Debian changes 1.0.9-1

tinc (1.0.9-1) unstable; urgency=low

  * New upstream release.
    - Binds IPv6 sockets only to IPv6. Closes: #440150
  * Update copyright file. Closes: #482566
This commit is contained in:
Guus Sliepen 2008-12-26 13:25:05 +01:00
commit 4812d2eb3d
53 changed files with 6947 additions and 1219 deletions

View file

@ -1,8 +1,8 @@
# Makefile.in generated by automake 1.10 from Makefile.am.
# Makefile.in generated by automake 1.10.1 from Makefile.am.
# @configure_input@
# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
# 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
# 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
# This Makefile.in is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

Binary file not shown.

File diff suppressed because it is too large Load diff

View file

@ -1,21 +1,25 @@
.Dd 2002-04-09
.Dd 2008-12-22
.Dt TINC.CONF 5
.\" Manual page created by:
.\" Ivo Timmermans
.\" Guus Sliepen <guus@tinc-vpn.org>
.Sh NAME
.Nm tinc.conf
.Nd tinc daemon configuration
.Sh DESCRIPTION
The files in the
.Pa @sysconfdir@/tinc/
directory contain runtime and security information for the tinc daemon.
.Sh NETWORKS
It is perfectly ok for you to run more than one tinc daemon.
However, in its default form,
you will soon notice that you can't use two different configuration files without the
.Fl c
option.
.Pp
We have thought of another way of dealing with this: network names.
This means that you call
@ -23,6 +27,7 @@ This means that you call
with the
.Fl n
option, which will assign a name to this daemon.
.Pp
The effect of this is that the daemon will set its configuration root to
.Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa / ,
@ -33,6 +38,7 @@ is your argument to the
option.
You'll notice that messages appear in syslog as coming from
.Nm tincd. Ns Ar NETNAME .
.Pp
However, it is not strictly necessary that you call tinc with the
.Fl n
@ -48,21 +54,25 @@ the configuration file should be
.Pa @sysconfdir@/tinc/tinc.conf ,
and the host configuration files are now expected to be in
.Pa @sysconfdir@/tinc/hosts/ .
.Pp
But it is highly recommended that you use this feature of
.Nm tinc ,
because it will be so much clearer whom your daemon talks to.
Hence, we will assume that you use it.
.Sh NAMES
Each tinc daemon should have a name that is unique in the network which it will be part of.
The name will be used by other tinc daemons for identification.
The name has to be declared in the
.Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /tinc.conf
file.
.Pp
To make things easy,
choose something that will give unique and easy to remember names to your tinc daemon(s).
You could try things like hostnames, owner surnames or location names.
.Sh PUBLIC/PRIVATE KEYS
You should use
.Ic tincd -K
@ -81,14 +91,17 @@ The public key should be stored in the host configuration file
.Va NAME
stands for the name of the local tinc daemon (see
.Sx NAMES ) .
.Sh SERVER CONFIGURATION
The server configuration of the daemon is done in the file
.Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /tinc.conf .
This file consists of comments (lines started with a
.Li # )
or assignments in the form of:
.Pp
.Va Variable Li = Ar Value .
.Pp
The variable names are case insensitive, and any spaces, tabs,
newlines and carriage returns are ignored.
@ -96,30 +109,37 @@ Note: it is not required that you put in the
.Li =
sign, but doing so improves readability.
If you leave it out, remember to replace it with at least one space character.
.Pp
Here are all valid variables, listed in alphabetical order.
The default value is given between parentheses.
.Bl -tag -width indent
.It Va AddressFamily Li = ipv4 | ipv6 | any Pq any
This option affects the address family of listening and outgoing sockets.
If
.Qq any
is selected, then depending on the operating system both IPv4 and IPv6 or just
IPv6 listening sockets will be created.
.It Va BindToAddress Li = Ar address Bq experimental
If your computer has more than one IPv4 or IPv6 address,
.Nm tinc
will by default listen on all of them for incoming connections.
It is possible to bind only to a single address with this variable.
.Pp
This option may not work on all platforms.
.It Va BindToInterface Li = Ar interface Bq experimental
If your computer has more than one network interface,
.Nm tinc
will by default listen on all of them for incoming connections.
It is possible to bind only to a single interface with this variable.
.Pp
This option may not work on all platforms.
.It Va ConnectTo Li = Ar name
Specifies which other tinc daemon to connect to on startup.
Multiple
@ -130,12 +150,14 @@ The names should be known to this tinc daemon
(i.e., there should be a host configuration file for the name on the
.Va ConnectTo
line).
.Pp
If you don't specify a host with
.Va ConnectTo ,
.Nm tinc
won't try to connect to other daemons at all,
and will instead just listen for incoming connections.
.It Va Device Li = Ar device Po Pa /dev/tap0 , Pa /dev/net/tun No or other depending on platform Pc
The virtual network device to use.
.Nm tinc
@ -147,6 +169,36 @@ instead of
.Va Device .
The info pages of the tinc package contain more information
about configuring the virtual network device.
.It Va DeviceType Li = tun | tunnohead | tunifhead | tap Po only supported on BSD platforms Pc
The type of the virtual network device.
Tinc will normally automatically select the right type, and this option should not be used.
However, in case tinc does not seem to correctly interpret packets received from the virtual network device,
using this option might help.
.Bl -tag -width indent
.It tun
Set type to tun.
Depending on the platform, this can either be with or without an address family header (see below).
.It tunnohead
Set type to tun without an address family header.
Tinc will expect packets read from the virtual network device to start with an IP header.
On some platforms IPv6 packets cannot be read from or written to the device in this mode.
.It tunifhead
Set type to tun with an address family header.
Tinc will expect packets read from the virtual network device
to start with a four byte header containing the address family,
followed by an IP header.
This mode should support both IPv4 and IPv6 packets.
.It tap
Set type to tap.
Tinc will expect packets read from the virtual network device
to start with an Ethernet header.
.El
.It Va GraphDumpFile Li = Ar filename Bq experimental
If this option is present,
.Nm tinc
@ -159,14 +211,17 @@ If
starts with a pipe symbol |,
then the rest of the filename is interpreted as a shell command
that is executed, the graph is then sent to stdin.
.It Va Hostnames Li = yes | no Pq no
This option selects whether IP addresses (both real and on the VPN) should
be resolved. Since DNS lookups are blocking, it might affect tinc's
efficiency, even stopping the daemon for a few seconds every time it does
a lookup if your DNS server is not responding.
.Pp
This does not affect resolving hostnames to IP addresses from the
host configuration files.
.It Va Interface Li = Ar interface
Defines the name of the interface corresponding to the virtual network device.
Depending on the operating system and the type of device this may or may not actually set the name of the interface.
@ -174,58 +229,73 @@ Under Windows, this variable is used to select which network interface will be u
If you specified a
.Va Device ,
this variable is almost always already correctly set.
.It Va KeyExpire Li = Ar seconds Pq 3600
This option controls the period the encryption keys used to encrypt the data are valid.
It is common practice to change keys at regular intervals to make it even harder for crackers,
even though it is thought to be nearly impossible to crack a single key.
.It Va MACExpire Li = Ar seconds Pq 600
This option controls the amount of time MAC addresses are kept before they are removed.
This only has effect when
.Va Mode
is set to
.Qq switch .
.It Va MaxTimeout Li = Ar seconds Pq 900
This is the maximum delay before trying to reconnect to other tinc daemons.
.It Va Mode Li = router | switch | hub Pq router
This option selects the way packets are routed to other daemons.
.Bl -tag -width indent
.It router
In this mode
.Va Subnet
variables in the host configuration files will be used to form a routing table.
Only unicast packets of routable protocols (IPv4 and IPv6) are supported in this mode.
.Pp
This is the default mode, and unless you really know you need another mode, don't change it.
.It switch
In this mode the MAC addresses of the packets on the VPN will be used to
dynamically create a routing table just like an Ethernet switch does.
Unicast, multicast and broadcast packets of every protocol that runs over Ethernet are supported in this mode
at the cost of frequent broadcast ARP requests and routing table updates.
.Pp
This mode is primarily useful if you want to bridge Ethernet segments.
.It hub
This mode is almost the same as the switch mode, but instead
every packet will be broadcast to the other daemons
while no routing table is managed.
.El
.It Va Name Li = Ar name Bq required
This is the name which identifies this tinc daemon.
It must be unique for the virtual private network this daemon will connect to.
.It Va PingInterval Li = Ar seconds Pq 60
The number of seconds of inactivity that
.Nm tinc
will wait before sending a probe to the other end.
.It Va PingTimeout Li = Ar seconds Pq 5
The number of seconds to wait for a response to pings or to allow meta
connections to block. If the other end doesn't respond within this time,
the connection is terminated,
and the others will be notified of this.
.It Va PriorityInheritance Li = yes | no Po no Pc Bq experimental
When this option is enabled the value of the TOS field of tunneled IPv4 packets
will be inherited by the UDP packets that are sent out.
.It Va PrivateKey Li = Ar key Bq obsolete
The private RSA key of this tinc daemon.
It will allow this tinc daemon to authenticate itself to other daemons.
.It Va PrivateKeyFile Li = Ar filename Po Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /rsa_key.priv Pc
The file in which the private RSA key of this tinc daemon resides.
Note that there must be exactly one of
@ -233,17 +303,20 @@ Note that there must be exactly one of
or
.Va PrivateKeyFile
specified in the configuration file.
.It Va TunnelServer Li = yes | no Po no Pc Bq experimental
When this option is enabled tinc will no longer forward information between other tinc daemons,
and will only allow nodes and subnets on the VPN which are present in the
.Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /hosts/
directory.
.El
.Sh HOST CONFIGURATION FILES
The host configuration files contain all information needed
to establish a connection to those hosts.
A host configuration file is also required for the local tinc daemon,
it will use it to read in it's listen port, public key and subnets.
.Pp
The idea is that these files are portable.
You can safely mail your own host configuration file to someone else.
@ -252,6 +325,7 @@ and now his tinc daemon will be able to connect to your tinc daemon.
Since host configuration files only contain public keys,
no secrets are revealed by sending out this information.
.Bl -tag -width indent
.It Va Address Li = Ar address Bq recommended
The IP address or hostname of this tinc daemon on the real network.
This will only be used when trying to make an outgoing connection to this tinc daemon.
@ -259,6 +333,7 @@ Multiple
.Va Address
variables can be specified, in which case each address will be tried until a working
connection has been established.
.It Va Cipher Li = Ar cipher Pq blowfish
The symmetric cipher algorithm used to encrypt UDP packets.
Any cipher supported by OpenSSL is recognised.
@ -266,16 +341,19 @@ Furthermore, specifying
.Qq none
will turn off packet encryption.
It is best to use only those ciphers which support CBC mode.
.It Va Compression Li = Ar level Pq 0
This option sets the level of compression used for UDP packets.
Possible values are 0 (off), 1 (fast zlib) and any integer up to 9 (best zlib),
10 (fast lzo) and 11 (best lzo).
.It Va Digest Li = Ar digest Pq sha1
The digest algorithm used to authenticate UDP packets.
Any digest supported by OpenSSL is recognised.
Furthermore, specifying
.Qq none
will turn off packet authentication.
.It Va IndirectData Li = yes | no Pq no
This option specifies whether other tinc daemons besides the one you specified with
.Va ConnectTo
@ -283,23 +361,30 @@ can make a direct connection to you.
This is especially useful if you are behind a firewall
and it is impossible to make a connection from the outside to your tinc daemon.
Otherwise, it is best to leave this option out or set it to no.
.It Va MACLength Li = Ar length Pq 4
The length of the message authentication code used to authenticate UDP packets.
Can be anything from
.Qq 0
up to the length of the digest produced by the digest algorithm.
.It Va PMTU Li = Ar mtu Po 1514 Pc Bq experimental
.It Va PMTU Li = Ar mtu Po 1514 Pc
This option controls the initial path MTU to this node.
.It Va PMTUDiscovery Li = yes | no Po no Pc Bq experimental
.It Va PMTUDiscovery Li = yes | no Po yes Pc
When this option is enabled, tinc will try to discover the path MTU to this node.
After the path MTU has been discovered, it will be enforced on the VPN.
.It Va Port Li = Ar port Pq 655
The port number on which this tinc daemon is listening for incoming connections.
.It Va PublicKey Li = Ar key Bq obsolete
The public RSA key of this tinc daemon.
It will be used to cryptographically verify it's identity and to set up a secure connection.
.It Va PublicKeyFile Li = Ar filename Bq obsolete
The file in which the public RSA key of this tinc daemon resides.
.Pp
From version 1.0pre4 on
.Nm tinc
@ -308,6 +393,7 @@ the above two options then are not necessary.
Either the PEM format is used, or exactly one of the above two options must be specified
in each host configuration file,
if you want to be able to establish a connection with that host.
.It Va Subnet Li = Ar address Ns Op Li / Ns Ar prefixlength
The subnet which this tinc daemon will serve.
.Nm tinc
@ -317,6 +403,7 @@ it will be sent to the daemon who has this subnet in his host configuration file
Multiple
.Va Subnet
variables can be specified.
.Pp
Subnets can either be single MAC, IPv4 or IPv6 addresses,
in which case a subnet consisting of only that single address is assumed,
@ -328,6 +415,7 @@ Note that subnets like 192.168.1.1/24 are invalid!
Read a networking HOWTO/FAQ/guide if you don't understand this.
IPv6 subnets are notated like fec0:0:0:1:0:0:0:0/64.
MAC addresses are notated like 0:1a:2b:3c:4d:5e.
.It Va TCPOnly Li = yes | no Pq no
If this variable is set to yes,
then the packets are tunnelled over the TCP connection instead of a UDP connection.
@ -336,38 +424,48 @@ from behind a masquerading firewall,
or if UDP packet routing is disabled somehow.
Setting this options also implicitly sets IndirectData.
.El
.Sh SCRIPTS
Apart from reading the server and host configuration files,
tinc can also run scripts at certain moments.
Under Windows (not Cygwin), the scripts should have the extension
.Pa .bat .
.Bl -tag -width indent
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /tinc-up
This is the most important script.
If it is present it will be executed right after the tinc daemon has been started and has connected to the virtual network device.
It should be used to set up the corresponding network interface,
but can also be used to start other things.
Under Windows you can use the Network Connections control panel instead of creating this script.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /tinc-down
This script is started right before the tinc daemon quits.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /hosts/ Ns Ar HOST Ns Pa -up
This script is started when the tinc daemon with name
.Ar HOST
becomes reachable.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /hosts/ Ns Ar HOST Ns Pa -down
This script is started when the tinc daemon with name
.Ar HOST
becomes unreachable.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /host-up
This script is started when any host becomes reachable.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /host-down
This script is started when any host becomes unreachable.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /subnet-up
This script is started when a Subnet becomes reachable.
The Subnet and the node it belongs to are passed in environment variables.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /subnet-down
This script is started when a Subnet becomes unreachable.
.El
.Pp
The scripts are started without command line arguments, but can make use of certain environment variables.
Under UNIX like operating systems the names of environment variables must be preceded by a
@ -379,49 +477,65 @@ files, they have to be put between
.Li %
signs.
.Bl -tag -width indent
.It Ev NETNAME
If a netname was specified, this environment variable contains it.
.It Ev NAME
Contains the name of this tinc daemon.
.It Ev DEVICE
Contains the name of the virtual network device that tinc uses.
.It Ev INTERFACE
Contains the name of the virtual network interface that tinc uses.
This should be used for commands like
.Pa ifconfig .
.It Ev NODE
When a host becomes (un)reachable, this is set to its name.
If a subnet becomes (un)reachable, this is set to the owner of that subnet.
.It Ev REMOTEADDRESS
When a host becomes (un)reachable, this is set to its real address.
.It Ev REMOTEPORT
When a host becomes (un)reachable, this is set to the port number it uses for communication with other tinc daemons.
.It Ev SUBNET
When a subnet becomes (un)reachable, this is set to the subnet.
.El
.Sh FILES
The most important files are:
.Bl -tag -width indent
.It Pa @sysconfdir@/tinc/
The top directory for configuration files.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /tinc.conf
The default name of the server configuration file for net
.Ar NETNAME .
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /hosts/
Host configuration files are kept in this directory.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /tinc-up
If an executable file with this name exists,
it will be executed right after the tinc daemon has connected to the virtual network device.
It can be used to set up the corresponding network interface.
.It Pa @sysconfdir@/tinc/ Ns Ar NETNAME Ns Pa /tinc-down
If an executable file with this name exists,
it will be executed right before the tinc daemon is going to close
its connection to the virtual network device.
.El
.Sh SEE ALSO
.Xr tincd 8 ,
.Pa http://www.tinc-vpn.org/ ,
.Pa http://www.linuxdoc.org/LDP/nag2/ .
.Pp
The full documentation for
.Nm tinc
@ -429,6 +543,7 @@ is maintained as a Texinfo manual.
If the info and tinc programs are properly installed at your site, the command
.Ic info tinc
should give you access to the complete manual.
.Pp
.Nm tinc
comes with ABSOLUTELY NO WARRANTY.

View file

@ -1,17 +1,17 @@
This is tinc.info, produced by makeinfo version 4.8 from tinc.texi.
This is tinc.info, produced by makeinfo version 4.11 from tinc.texi.
INFO-DIR-SECTION Networking tools
START-INFO-DIR-ENTRY
* tinc: (tinc). The tinc Manual.
END-INFO-DIR-ENTRY
This is the info manual for tinc version 1.0.8, a Virtual Private
This is the info manual for tinc version 1.0.9, a Virtual Private
Network daemon.
Copyright (C) 1998-2006 Ivo Timmermans, Guus Sliepen
Copyright (C) 1998-2008 Ivo Timmermans, Guus Sliepen
<guus@tinc-vpn.org> and Wessel Dankers <wsl@tinc-vpn.org>.
$Id: tinc.texi 1467 2006-11-11 20:37:58Z guus $
$Id: tinc.texi 1597 2008-12-22 21:29:21Z guus $
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
@ -173,8 +173,7 @@ File: tinc.info, Node: Configuring the kernel, Next: Libraries, Up: Preparati
* Menu:
* Configuration of Linux kernels 2.1.60 up to 2.4.0::
* Configuration of Linux kernels 2.4.0 and higher::
* Configuration of Linux kernels::
* Configuration of FreeBSD kernels::
* Configuration of OpenBSD kernels::
* Configuration of NetBSD kernels::
@ -183,53 +182,14 @@ File: tinc.info, Node: Configuring the kernel, Next: Libraries, Up: Preparati
* Configuration of Windows::

File: tinc.info, Node: Configuration of Linux kernels 2.1.60 up to 2.4.0, Next: Configuration of Linux kernels 2.4.0 and higher, Up: Configuring the kernel
File: tinc.info, Node: Configuration of Linux kernels, Next: Configuration of FreeBSD kernels, Up: Configuring the kernel
2.1.1 Configuration of Linux kernels 2.1.60 up to 2.4.0
-------------------------------------------------------
2.1.1 Configuration of Linux kernels
------------------------------------
For kernels up to 2.4.0, you need a kernel that supports the ethertap
For tinc to work, you need a kernel that supports the Universal tun/tap
device. Most distributions come with kernels that already support this.
If not, here are the options you have to turn on when configuring a new
kernel:
Code maturity level options
[*] Prompt for development and/or incomplete code/drivers
Networking options
[*] Kernel/User netlink socket
<M> Netlink device emulation
Network device support
<M> Ethertap network tap
If you want to run more than one instance of tinc or other programs
that use the ethertap, you have to compile the ethertap driver as a
module, otherwise you can also choose to compile it directly into the
kernel.
If you decide to build any of these as dynamic kernel modules, it's
a good idea to add these lines to `/etc/modules.conf':
alias char-major-36 netlink_dev
alias tap0 ethertap
options tap0 -o tap0 unit=0
alias tap1 ethertap
options tap1 -o tap1 unit=1
...
alias tap_N_ ethertap
options tap_N_ -o tap_N_ unit=_N_
Add as much alias/options lines as necessary.

File: tinc.info, Node: Configuration of Linux kernels 2.4.0 and higher, Next: Configuration of FreeBSD kernels, Prev: Configuration of Linux kernels 2.1.60 up to 2.4.0, Up: Configuring the kernel
2.1.2 Configuration of Linux kernels 2.4.0 and higher
-----------------------------------------------------
For kernels 2.4.0 and higher, you need a kernel that supports the
Universal tun/tap device. Most distributions come with kernels that
already support this. Here are the options you have to turn on when
configuring a new kernel:
Here are the options you have to turn on when configuring a new kernel:
Code maturity level options
[*] Prompt for development and/or incomplete code/drivers
@ -239,20 +199,15 @@ configuring a new kernel:
It's not necessary to compile this driver as a module, even if you
are going to run more than one instance of tinc.
If you have an early 2.4 kernel, you can choose both the tun/tap
driver and the `Ethertap network tap' device. This latter is marked
obsolete, and chances are that it won't even function correctly
anymore. Make sure you select the universal tun/tap driver.
If you decide to build the tun/tap driver as a kernel module, add
these lines to `/etc/modules.conf':
alias char-major-10-200 tun

File: tinc.info, Node: Configuration of FreeBSD kernels, Next: Configuration of OpenBSD kernels, Prev: Configuration of Linux kernels 2.4.0 and higher, Up: Configuring the kernel
File: tinc.info, Node: Configuration of FreeBSD kernels, Next: Configuration of OpenBSD kernels, Prev: Configuration of Linux kernels, Up: Configuring the kernel
2.1.3 Configuration of FreeBSD kernels
2.1.2 Configuration of FreeBSD kernels
--------------------------------------
For FreeBSD version 4.1 and higher, tun and tap drivers are included in
@ -261,18 +216,20 @@ the default kernel configuration. Using tap devices is recommended.

File: tinc.info, Node: Configuration of OpenBSD kernels, Next: Configuration of NetBSD kernels, Prev: Configuration of FreeBSD kernels, Up: Configuring the kernel
2.1.4 Configuration of OpenBSD kernels
2.1.3 Configuration of OpenBSD kernels
--------------------------------------
For OpenBSD version 2.9 and higher, the tun driver is included in the
default kernel configuration. There is also a kernel patch from
`http://diehard.n-r-g.com/stuff/openbsd/' which adds a tap device to
OpenBSD. This should work with tinc.
OpenBSD which should work with tinc, but with recent versions of
OpenBSD, a tun device can act as a tap device by setting the link0
option with ifconfig.

File: tinc.info, Node: Configuration of NetBSD kernels, Next: Configuration of Solaris kernels, Prev: Configuration of OpenBSD kernels, Up: Configuring the kernel
2.1.5 Configuration of NetBSD kernels
2.1.4 Configuration of NetBSD kernels
-------------------------------------
For NetBSD version 1.5.2 and higher, the tun driver is included in the
@ -283,7 +240,7 @@ default kernel configuration.

File: tinc.info, Node: Configuration of Solaris kernels, Next: Configuration of Darwin (MacOS/X) kernels, Prev: Configuration of NetBSD kernels, Up: Configuring the kernel
2.1.6 Configuration of Solaris kernels
2.1.5 Configuration of Solaris kernels
--------------------------------------
For Solaris 8 (SunOS 5.8) and higher, the tun driver may or may not be
@ -296,7 +253,7 @@ header file is missing, install it from the source package.

File: tinc.info, Node: Configuration of Darwin (MacOS/X) kernels, Next: Configuration of Windows, Prev: Configuration of Solaris kernels, Up: Configuring the kernel
2.1.7 Configuration of Darwin (MacOS/X) kernels
2.1.6 Configuration of Darwin (MacOS/X) kernels
-----------------------------------------------
Tinc on Darwin relies on a tunnel driver for its data acquisition from
@ -312,7 +269,7 @@ with the following command:

File: tinc.info, Node: Configuration of Windows, Prev: Configuration of Darwin (MacOS/X) kernels, Up: Configuring the kernel
2.1.8 Configuration of Windows
2.1.7 Configuration of Windows
------------------------------
You will need to install the latest TAP-Win32 driver from OpenVPN. You
@ -550,35 +507,13 @@ File: tinc.info, Node: Device files, Next: Other files, Up: System files
3.2.1 Device files
------------------
First, you'll need the special device file(s) that form the interface
between the kernel and the daemon.
Most operating systems nowadays come with the necessary device files by
default, or they have a mechanism to create them on demand.
The permissions for these files have to be such that only the super
user may read/write to this file. You'd want this, because otherwise
eavesdropping would become a bit too easy. This does, however, imply
that you'd have to run tincd as root.
If you use Linux and do not have udev installed, you may need to
create the following device file if it does not exist:
If you use Linux and have a kernel version prior to 2.4.0, you have
to make the ethertap devices:
mknod -m 600 /dev/tap0 c 36 16
mknod -m 600 /dev/tap1 c 36 17
...
mknod -m 600 /dev/tap_N_ c 36 _N+16_
There is a maximum of 16 ethertap devices.
If you use the universal tun/tap driver, you have to create the
following device file (unless it already exist):
mknod -m 600 /dev/tun c 10 200
If you use Linux, and you run the new 2.4 kernel using the devfs
filesystem, then the tun/tap device will probably be automatically
generated as `/dev/net/tun'.
Unlike the ethertap device, you do not need multiple device files if
you are planning to run multiple tinc daemons.
mknod -m 600 /dev/net/tun c 10 200

File: tinc.info, Node: Other files, Prev: Device files, Up: System files
@ -774,9 +709,37 @@ Device = <DEVICE> (`/dev/tap0', `/dev/net/tun' or other depending on platform)
The virtual network device to use. Tinc will automatically detect
what kind of device it is. Note that you can only use one device
per daemon. Under Windows, use INTERFACE instead of DEVICE. Note
that you can only use one device per daemon. See also *Note
that you can only use one device per daemon. See also *note
Device files::.
DeviceType = <tun|tunnohead|tunifhead|tap> (only supported on BSD platforms)
The type of the virtual network device. Tinc will normally
automatically select the right type, and this option should not be
used. However, in case tinc does not seem to correctly interpret
packets received from the virtual network device, using this
option might help.
tun
Set type to tun. Depending on the platform, this can either
be with or without an address family header (see below).
tunnohead
Set type to tun without an address family header. Tinc will
expect packets read from the virtual network device to start
with an IP header. On some platforms IPv6 packets cannot be
read from or written to the device in this mode.
tunifhead
Set type to tun with an address family header. Tinc will
expect packets read from the virtual network device to start
with a four byte header containing the address family,
followed by an IP header. This mode should support both IPv4
and IPv6 packets.
tap
Set type to tap. Tinc will expect packets read from the
virtual network device to start with an Ethernet header.
GraphDumpFile = <FILENAME> [experimental]
If this option is present, tinc will dump the current network
graph to the file FILENAME every minute, unless there were no
@ -843,7 +806,9 @@ MACExpire = <SECONDS> (600)
"switch".
Name = <NAME> [required]
This is a symbolic name for this connection. It can be anything
This is a symbolic name for this connection. The name should
consist only of alfanumeric and underscore characters (a-z, A-Z,
0-9 and _).
PingInterval = <SECONDS> (60)
The number of seconds of inactivity that tinc will wait before
@ -921,6 +886,14 @@ MACLength = <BYTES> (4)
UDP packets. Can be anything from 0 up to the length of the
digest produced by the digest algorithm.
PMTU = <MTU> (1514)
This option controls the initial path MTU to this node.
PMTUDiscovery = <yes|no> (yes)
When this option is enabled, tinc will try to discover the path
MTU to this node. After the path MTU has been discovered, it will
be enforced on the VPN.
Port = <PORT> (655)
This is the port this tinc daemon listens on. You can use decimal
portnumbers or symbolic names (as listed in `/etc/services').
@ -963,7 +936,7 @@ Subnet = <ADDRESS[/PREFIXLENGTH]>
becomes /22. This conforms to standard CIDR notation as described
in RFC1519 (ftp://ftp.isi.edu/in-notes/rfc1519.txt)
TCPonly = <yes|no> (no) [experimental]
TCPonly = <yes|no> (no)
If this variable is set to yes, then the packets are tunnelled
over a TCP connection instead of a UDP connection. This is
especially useful for those who want to run a tinc daemon from
@ -1140,7 +1113,7 @@ subnet.
The exact syntax of the ifconfig and route commands differs from
platform to platform. You can look up the commands for setting
addresses and adding routes in *Note Platform specific information::,
addresses and adding routes in *note Platform specific information::,
but it is best to consult the manpages of those utilities on your
platform.
@ -1618,7 +1591,7 @@ File: tinc.info, Node: Sending bug reports, Prev: Error messages, Up: Running
=======================
If you really can't find the cause of a problem, or if you suspect tinc
is not working right, you can send us a bugreport, see *Note Contact
is not working right, you can send us a bugreport, see *note Contact
information::. Be sure to include the following information in your
bugreport:
@ -1774,7 +1747,7 @@ possible to use tools such as telnet or netcat to connect to a tinc
daemon started with the -bypass-security option and to read and write
requests by hand, provided that one understands the numeric codes sent.
The authentication scheme is described in *Note Authentication
The authentication scheme is described in *note Authentication
protocol::. After a successful authentication, the server and the
client will exchange all the information about other tinc daemons and
subnets they know of, so that both sides (and all the other tinc
@ -2219,7 +2192,7 @@ Concept Index
* CHALLENGE: Authentication protocol.
(line 10)
* CIDR notation: Host configuration variables.
(line 77)
(line 85)
* Cipher: Host configuration variables.
(line 11)
* client: How connections work.
@ -2240,51 +2213,51 @@ Concept Index
* Device: Main configuration variables.
(line 38)
* device files: Device files. (line 6)
* DeviceType: Main configuration variables.
(line 45)
* Digest: Host configuration variables.
(line 22)
* encapsulating: The UDP tunnel. (line 30)
* encryption: Encryption of network packets.
(line 6)
* environment variables: Scripts. (line 43)
* ethertap: Configuration of Linux kernels 2.1.60 up to 2.4.0.
(line 6)
* example: Example configuration.
(line 6)
* frame type: The UDP tunnel. (line 6)
* GraphDumpFile: Main configuration variables.
(line 45)
(line 73)
* Hostnames: Main configuration variables.
(line 53)
(line 81)
* hub: Main configuration variables.
(line 94)
(line 122)
* ID: Authentication protocol.
(line 10)
* IndirectData: Host configuration variables.
(line 27)
* INTERFACE: Scripts. (line 58)
* Interface: Main configuration variables.
(line 63)
(line 91)
* IRC: Contact information. (line 9)
* key generation: Generating keypairs. (line 6)
* KEY_CHANGED: The meta-protocol. (line 64)
* KeyExpire: Main configuration variables.
(line 99)
(line 127)
* libraries: Libraries. (line 6)
* license: OpenSSL. (line 36)
* lzo: lzo. (line 6)
* MACExpire: Main configuration variables.
(line 105)
(line 133)
* MACLength: Host configuration variables.
(line 35)
* meta-protocol: The meta-connection. (line 18)
* META_KEY: Authentication protocol.
(line 10)
* Mode: Main configuration variables.
(line 71)
(line 99)
* multiple networks: Multiple networks. (line 6)
* NAME: Scripts. (line 52)
* Name: Main configuration variables.
(line 110)
(line 138)
* netmask: Network interfaces. (line 34)
* NETNAME: Scripts. (line 49)
* netname: Multiple networks. (line 6)
@ -2294,36 +2267,40 @@ Concept Index
* OpenSSL: OpenSSL. (line 6)
* options: Runtime options. (line 9)
* PEM format: Host configuration variables.
(line 52)
(line 60)
* PING: The meta-protocol. (line 89)
* PingInterval: Main configuration variables.
(line 113)
(line 143)
* PingTimeout: Main configuration variables.
(line 117)
(line 147)
* platforms: Supported platforms. (line 6)
* PMTU: Host configuration variables.
(line 40)
* PMTUDiscovery: Host configuration variables.
(line 43)
* PONG: The meta-protocol. (line 89)
* Port: Host configuration variables.
(line 40)
(line 48)
* port numbers: Other files. (line 17)
* PriorityInheritance: Main configuration variables.
(line 123)
(line 153)
* private: Virtual Private Networks.
(line 10)
* PrivateKey: Main configuration variables.
(line 128)
(line 158)
* PrivateKeyFile: Main configuration variables.
(line 134)
(line 164)
* PublicKey: Host configuration variables.
(line 44)
(line 52)
* PublicKeyFile: Host configuration variables.
(line 47)
(line 55)
* release: Supported platforms. (line 14)
* REMOTEADDRESS: Scripts. (line 67)
* REMOTEPORT: Scripts. (line 70)
* REQ_KEY: The meta-protocol. (line 64)
* requirements: Libraries. (line 6)
* router: Main configuration variables.
(line 74)
(line 102)
* runtime options: Runtime options. (line 9)
* scalability: tinc. (line 19)
* scripts: Scripts. (line 6)
@ -2332,13 +2309,13 @@ Concept Index
* signals: Signals. (line 6)
* SUBNET: Scripts. (line 74)
* Subnet: Host configuration variables.
(line 59)
(line 67)
* SVPN: Security. (line 11)
* switch: Main configuration variables.
(line 83)
(line 111)
* TCP: The meta-connection. (line 10)
* TCPonly: Host configuration variables.
(line 82)
(line 90)
* TINC: Security. (line 6)
* tinc: Introduction. (line 6)
* tinc-down: Scripts. (line 18)
@ -2346,12 +2323,16 @@ Concept Index
* tinc-up: Scripts. (line 10)
* tincd: tinc. (line 14)
* traditional VPNs: tinc. (line 19)
* tunifhead: Main configuration variables.
(line 62)
* TunnelServer: Main configuration variables.
(line 142)
(line 172)
* tunnohead: Main configuration variables.
(line 56)
* UDP <1>: Encryption of network packets.
(line 12)
* UDP: The UDP tunnel. (line 30)
* Universal tun/tap: Configuration of Linux kernels 2.4.0 and higher.
* Universal tun/tap: Configuration of Linux kernels.
(line 6)
* virtual: Virtual Private Networks.
(line 18)
@ -2365,67 +2346,66 @@ Concept Index

Tag Table:
Node: Top860
Node: Introduction1159
Node: Virtual Private Networks1969
Node: tinc3694
Node: Supported platforms5221
Node: Preparations5919
Node: Configuring the kernel6175
Node: Configuration of Linux kernels 2.1.60 up to 2.4.06655
Node: Configuration of Linux kernels 2.4.0 and higher8027
Node: Configuration of FreeBSD kernels9267
Node: Configuration of OpenBSD kernels9674
Node: Configuration of NetBSD kernels10166
Node: Configuration of Solaris kernels10571
Node: Configuration of Darwin (MacOS/X) kernels11232
Node: Configuration of Windows11935
Node: Libraries12449
Node: OpenSSL12837
Node: zlib15113
Node: lzo15942
Node: Installation16729
Node: Building and installing tinc17744
Node: Darwin (MacOS/X) build environment18403
Node: Cygwin (Windows) build environment18971
Node: MinGW (Windows) build environment19559
Node: System files20083
Node: Device files20348
Node: Other files21534
Node: Configuration22147
Node: Configuration introduction22458
Node: Multiple networks23731
Node: How connections work25157
Node: Configuration files26379
Node: Main configuration variables27386
Node: Host configuration variables33863
Node: Scripts38159
Node: How to configure40838
Node: Generating keypairs42101
Node: Network interfaces42600
Node: Example configuration44448
Node: Running tinc49760
Node: Runtime options50350
Node: Signals52357
Node: Debug levels53426
Node: Solving problems54362
Node: Error messages55792
Node: Sending bug reports60114
Node: Technical information61066
Node: The connection61297
Node: The UDP tunnel61609
Node: The meta-connection64670
Node: The meta-protocol66139
Node: Security71148
Node: Authentication protocol72278
Node: Encryption of network packets77282
Node: Security issues78655
Node: Platform specific information80272
Node: Interface configuration80500
Node: Routes82399
Node: About us84315
Node: Contact information84490
Node: Authors84894
Node: Concept Index85320
Node: Top861
Node: Introduction1160
Node: Virtual Private Networks1970
Node: tinc3695
Node: Supported platforms5222
Node: Preparations5920
Node: Configuring the kernel6176
Node: Configuration of Linux kernels6585
Node: Configuration of FreeBSD kernels7440
Node: Configuration of OpenBSD kernels7830
Node: Configuration of NetBSD kernels8438
Node: Configuration of Solaris kernels8843
Node: Configuration of Darwin (MacOS/X) kernels9504
Node: Configuration of Windows10207
Node: Libraries10721
Node: OpenSSL11109
Node: zlib13385
Node: lzo14214
Node: Installation15001
Node: Building and installing tinc16016
Node: Darwin (MacOS/X) build environment16675
Node: Cygwin (Windows) build environment17243
Node: MinGW (Windows) build environment17831
Node: System files18355
Node: Device files18620
Node: Other files19036
Node: Configuration19649
Node: Configuration introduction19960
Node: Multiple networks21233
Node: How connections work22659
Node: Configuration files23881
Node: Main configuration variables24888
Node: Host configuration variables32721
Node: Scripts37286
Node: How to configure39965
Node: Generating keypairs41228
Node: Network interfaces41727
Node: Example configuration43575
Node: Running tinc48887
Node: Runtime options49477
Node: Signals51484
Node: Debug levels52553
Node: Solving problems53489
Node: Error messages54919
Node: Sending bug reports59241
Node: Technical information60193
Node: The connection60424
Node: The UDP tunnel60736
Node: The meta-connection63797
Node: The meta-protocol65266
Node: Security70275
Node: Authentication protocol71405
Node: Encryption of network packets76409
Node: Security issues77782
Node: Platform specific information79399
Node: Interface configuration79627
Node: Routes81526
Node: About us83442
Node: Contact information83617
Node: Authors84021
Node: Concept Index84447

End Tag Table

View file

@ -1,5 +1,5 @@
\input texinfo @c -*-texinfo-*-
@c $Id: tinc.texi 1467 2006-11-11 20:37:58Z guus $
@c $Id: tinc.texi 1597 2008-12-22 21:29:21Z guus $
@c %**start of header
@setfilename tinc.info
@settitle tinc Manual
@ -16,11 +16,11 @@
This is the info manual for @value{PACKAGE} version @value{VERSION}, a Virtual Private Network daemon.
Copyright @copyright{} 1998-2006 Ivo Timmermans,
Copyright @copyright{} 1998-2008 Ivo Timmermans,
Guus Sliepen <guus@@tinc-vpn.org> and
Wessel Dankers <wsl@@tinc-vpn.org>.
$Id: tinc.texi 1467 2006-11-11 20:37:58Z guus $
$Id: tinc.texi 1597 2008-12-22 21:29:21Z guus $
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
@ -47,7 +47,7 @@ Copyright @copyright{} 1998-2006 Ivo Timmermans,
Guus Sliepen <guus@@tinc-vpn.org> and
Wessel Dankers <wsl@@tinc-vpn.org>.
$Id: tinc.texi 1467 2006-11-11 20:37:58Z guus $
$Id: tinc.texi 1597 2008-12-22 21:29:21Z guus $
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
@ -225,8 +225,7 @@ support tinc.
@section Configuring the kernel
@menu
* Configuration of Linux kernels 2.1.60 up to 2.4.0::
* Configuration of Linux kernels 2.4.0 and higher::
* Configuration of Linux kernels::
* Configuration of FreeBSD kernels::
* Configuration of OpenBSD kernels::
* Configuration of NetBSD kernels::
@ -237,51 +236,11 @@ support tinc.
@c ==================================================================
@node Configuration of Linux kernels 2.1.60 up to 2.4.0
@subsection Configuration of Linux kernels 2.1.60 up to 2.4.0
@cindex ethertap
For kernels up to 2.4.0, you need a kernel that supports the ethertap device.
Most distributions come with kernels that already support this.
If not, here are the options you have to turn on when configuring a new kernel:
@example
Code maturity level options
[*] Prompt for development and/or incomplete code/drivers
Networking options
[*] Kernel/User netlink socket
<M> Netlink device emulation
Network device support
<M> Ethertap network tap
@end example
If you want to run more than one instance of tinc or other programs that use
the ethertap, you have to compile the ethertap driver as a module, otherwise
you can also choose to compile it directly into the kernel.
If you decide to build any of these as dynamic kernel modules, it's a good idea
to add these lines to @file{/etc/modules.conf}:
@example
alias char-major-36 netlink_dev
alias tap0 ethertap
options tap0 -o tap0 unit=0
alias tap1 ethertap
options tap1 -o tap1 unit=1
...
alias tap@emph{N} ethertap
options tap@emph{N} -o tap@emph{N} unit=@emph{N}
@end example
Add as much alias/options lines as necessary.
@c ==================================================================
@node Configuration of Linux kernels 2.4.0 and higher
@subsection Configuration of Linux kernels 2.4.0 and higher
@node Configuration of Linux kernels
@subsection Configuration of Linux kernels
@cindex Universal tun/tap
For kernels 2.4.0 and higher, you need a kernel that supports the Universal tun/tap device.
For tinc to work, you need a kernel that supports the Universal tun/tap device.
Most distributions come with kernels that already support this.
Here are the options you have to turn on when configuring a new kernel:
@ -295,11 +254,6 @@ Network device support
It's not necessary to compile this driver as a module, even if you are going to
run more than one instance of tinc.
If you have an early 2.4 kernel, you can choose both the tun/tap driver and the
`Ethertap network tap' device. This latter is marked obsolete, and chances are
that it won't even function correctly anymore. Make sure you select the
universal tun/tap driver.
If you decide to build the tun/tap driver as a kernel module, add these lines
to @file{/etc/modules.conf}:
@ -323,9 +277,9 @@ Using tap devices is recommended.
For OpenBSD version 2.9 and higher,
the tun driver is included in the default kernel configuration.
There is also a kernel patch from @uref{http://diehard.n-r-g.com/stuff/openbsd/}
which adds a tap device to OpenBSD.
This should work with tinc.
which adds a tap device to OpenBSD which should work with tinc,
but with recent versions of OpenBSD,
a tun device can act as a tap device by setting the link0 option with ifconfig.
@c ==================================================================
@node Configuration of NetBSD kernels
@ -609,40 +563,16 @@ files on your system.
@subsection Device files
@cindex device files
First, you'll need the special device file(s) that form the interface
between the kernel and the daemon.
Most operating systems nowadays come with the necessary device files by default,
or they have a mechanism to create them on demand.
The permissions for these files have to be such that only the super user
may read/write to this file. You'd want this, because otherwise
eavesdropping would become a bit too easy. This does, however, imply
that you'd have to run tincd as root.
If you use Linux and have a kernel version prior to 2.4.0, you have to make the
ethertap devices:
If you use Linux and do not have udev installed,
you may need to create the following device file if it does not exist:
@example
mknod -m 600 /dev/tap0 c 36 16
mknod -m 600 /dev/tap1 c 36 17
...
mknod -m 600 /dev/tap@emph{N} c 36 @emph{N+16}
mknod -m 600 /dev/net/tun c 10 200
@end example
There is a maximum of 16 ethertap devices.
If you use the universal tun/tap driver, you have to create the
following device file (unless it already exist):
@example
mknod -m 600 /dev/tun c 10 200
@end example
If you use Linux, and you run the new 2.4 kernel using the devfs filesystem,
then the tun/tap device will probably be automatically generated as
@file{/dev/net/tun}.
Unlike the ethertap device, you do not need multiple device files if
you are planning to run multiple tinc daemons.
@c ==================================================================
@node Other files
@ -862,6 +792,38 @@ Under Windows, use @var{Interface} instead of @var{Device}.
Note that you can only use one device per daemon.
See also @ref{Device files}.
@cindex DeviceType
@item DeviceType = <tun|tunnohead|tunifhead|tap> (only supported on BSD platforms)
The type of the virtual network device.
Tinc will normally automatically select the right type, and this option should not be used.
However, in case tinc does not seem to correctly interpret packets received from the virtual network device,
using this option might help.
@table @asis
@item tun
Set type to tun.
Depending on the platform, this can either be with or without an address family header (see below).
@cindex tunnohead
@item tunnohead
Set type to tun without an address family header.
Tinc will expect packets read from the virtual network device to start with an IP header.
On some platforms IPv6 packets cannot be read from or written to the device in this mode.
@cindex tunifhead
@item tunifhead
Set type to tun with an address family header.
Tinc will expect packets read from the virtual network device
to start with a four byte header containing the address family,
followed by an IP header.
This mode should support both IPv4 and IPv6 packets.
@item tap
Set type to tap.
Tinc will expect packets read from the virtual network device
to start with an Ethernet header.
@end table
@cindex GraphDumpFile
@item GraphDumpFile = <@var{filename}> [experimental]
If this option is present,
@ -932,7 +894,8 @@ This only has effect when Mode is set to "switch".
@cindex Name
@item Name = <@var{name}> [required]
This is a symbolic name for this connection. It can be anything
This is a symbolic name for this connection.
The name should consist only of alfanumeric and underscore characters (a-z, A-Z, 0-9 and _).
@cindex PingInterval
@item PingInterval = <@var{seconds}> (60)
@ -1019,6 +982,15 @@ The length of the message authentication code used to authenticate UDP packets.
Can be anything from 0
up to the length of the digest produced by the digest algorithm.
@cindex PMTU
@item PMTU = <@var{mtu}> (1514)
This option controls the initial path MTU to this node.
@cindex PMTUDiscovery
@item PMTUDiscovery = <yes|no> (yes)
When this option is enabled, tinc will try to discover the path MTU to this node.
After the path MTU has been discovered, it will be enforced on the VPN.
@cindex Port
@item Port = <@var{port}> (655)
This is the port this tinc daemon listens on.
@ -1068,7 +1040,7 @@ example: netmask 255.255.255.0 would become /24, 255.255.252.0 becomes
@uref{ftp://ftp.isi.edu/in-notes/rfc1519.txt, RFC1519}
@cindex TCPonly
@item TCPonly = <yes|no> (no) [experimental]
@item TCPonly = <yes|no> (no)
If this variable is set to yes, then the packets are tunnelled over a
TCP connection instead of a UDP connection. This is especially useful
for those who want to run a tinc daemon from behind a masquerading

249
doc/tinc/tinc_0.html Normal file
View file

@ -0,0 +1,249 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on December, 26 2008 by texi2html 1.78 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
Olaf Bachmann <obachman@mathematik.uni-kl.de>
and many others.
Maintained by: Many creative people.
Send bugs and suggestions to <texi2html-bug@nongnu.org>
-->
<head>
<title>tinc Manual: 1. Introduction</title>
<meta name="description" content="tinc Manual: 1. Introduction">
<meta name="keywords" content="tinc Manual: 1. Introduction">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.78">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.roman {font-family:serif; font-weight:normal;}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Introduction"></a>
<a name="SEC1"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[ &lt; ]</td>
<td valign="middle" align="left">[<a href="#SEC2" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[ &lt;&lt; ]</td>
<td valign="middle" align="left">[ Up ]</td>
<td valign="middle" align="left">[<a href="tinc_1.html#SEC5" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 1. Introduction </h1>
<p>Tinc is a Virtual Private Network (VPN) daemon that uses tunneling and
encryption to create a secure private network between hosts on the
Internet.
</p>
<p>Because the tunnel appears to the IP level network code as a normal
network device, there is no need to adapt any existing software.
The encrypted tunnels allows VPN sites to share information with each other
over the Internet without exposing any information to others.
</p>
<p>This document is the manual for tinc. Included are chapters on how to
configure your computer to use tinc, as well as the configuration
process of tinc itself.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC2">1.1 Virtual Private Networks</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC3">1.2 tinc</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top"> About tinc
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC4">1.3 Supported platforms</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Virtual-Private-Networks"></a>
<a name="SEC2"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC1" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC3" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_1.html#SEC5" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 1.1 Virtual Private Networks </h2>
<a name="IDX1"></a>
<p>A Virtual Private Network or VPN is a network that can only be accessed
by a few elected computers that participate. This goal is achievable in
more than just one way.
</p>
<a name="IDX2"></a>
<p>Private networks can consist of a single stand-alone Ethernet LAN. Or
even two computers hooked up using a null-modem cable. In these cases,
it is
obvious that the network is <em>private</em>, no one can access it from the
outside. But if your computers are linked to the Internet, the network
is not private anymore, unless one uses firewalls to block all private
traffic. But then, there is no way to send private data to trusted
computers on the other end of the Internet.
</p>
<p>This problem can be solved by using <em>virtual</em> networks. Virtual
networks can live on top of other networks, but they use encapsulation to
keep using their private address space so they do not interfere with
the Internet. Mostly, virtual networks appear like a singe LAN, even though
they can span the entire world. But virtual networks can't be secured
by using firewalls, because the traffic that flows through it has to go
through the Internet, where other people can look at it.
</p>
<p>As is the case with either type of VPN, anybody could eavesdrop. Or
worse, alter data. Hence it's probably advisable to encrypt the data
that flows over the network.
</p>
<p>When one introduces encryption, we can form a true VPN. Other people may
see encrypted traffic, but if they don't know how to decipher it (they
need to know the key for that), they cannot read the information that flows
through the VPN. This is what tinc was made for.
</p>
<hr size="6">
<a name="tinc"></a>
<a name="SEC3"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC2" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC4" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_1.html#SEC5" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 1.2 tinc </h2>
<a name="IDX3"></a>
<p>I really don't quite remember what got us started, but it must have been
Guus' idea. He wrote a simple implementation (about 50 lines of C) that
used the ethertap device that Linux knows of since somewhere
about kernel 2.1.60. It didn't work immediately and he improved it a
bit. At this stage, the project was still simply called &quot;vpnd&quot;.
</p>
<p>Since then, a lot has changed&mdash;to say the least.
</p>
<a name="IDX4"></a>
<p>Tinc now supports encryption, it consists of a single daemon (tincd) for
both the receiving and sending end, it has become largely
runtime-configurable&mdash;in short, it has become a full-fledged
professional package.
</p>
<a name="IDX5"></a>
<p>Tinc also allows more than two sites to connect to eachother and form a single VPN.
Traditionally VPNs are created by making tunnels, which only have two endpoints.
Larger VPNs with more sites are created by adding more tunnels.
Tinc takes another approach: only endpoints are specified,
the software itself will take care of creating the tunnels.
This allows for easier configuration and improved scalability.
</p>
<p>A lot can&mdash;and will be&mdash;changed. We have a number of things that we would like to
see in the future releases of tinc. Not everything will be available in
the near future. Our first objective is to make tinc work perfectly as
it stands, and then add more advanced features.
</p>
<p>Meanwhile, we're always open-minded towards new ideas. And we're
available too.
</p>
<hr size="6">
<a name="Supported-platforms"></a>
<a name="SEC4"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC3" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_1.html#SEC5" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_1.html#SEC5" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 1.3 Supported platforms </h2>
<a name="IDX6"></a>
<p>Tinc has been verified to work under Linux, FreeBSD, OpenBSD, NetBSD, MacOS/X (Darwin), Solaris, and Windows (both natively and in a Cygwin environment),
with various hardware architectures. These are some of the platforms
that are supported by the universal tun/tap device driver or other virtual network device drivers.
Without such a driver, tinc will most
likely compile and run, but it will not be able to send or receive data
packets.
</p>
<p>For an up to date list of supported platforms, please check the list on
our website:
<a href="http://www.tinc-vpn.org/platforms">http://www.tinc-vpn.org/platforms</a>.
</p>
<hr size="6">
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC1" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_1.html#SEC5" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<p>
<font size="-1">
This document was generated by <em>Guus Sliepen</em> on <em>December, 26 2008</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.78</em></a>.
</font>
<br>
</p>
</body>
</html>

536
doc/tinc/tinc_1.html Normal file
View file

@ -0,0 +1,536 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on December, 26 2008 by texi2html 1.78 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
Olaf Bachmann <obachman@mathematik.uni-kl.de>
and many others.
Maintained by: Many creative people.
Send bugs and suggestions to <texi2html-bug@nongnu.org>
-->
<head>
<title>tinc Manual: 2. Preparations</title>
<meta name="description" content="tinc Manual: 2. Preparations">
<meta name="keywords" content="tinc Manual: 2. Preparations">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.78">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.roman {font-family:serif; font-weight:normal;}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Preparations"></a>
<a name="SEC5"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="tinc_0.html#SEC4" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 2. Preparations </h1>
<p>This chapter contains information on how to prepare your system to
support tinc.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC6">2.1 Configuring the kernel</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC14">2.2 Libraries</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Configuring-the-kernel"></a>
<a name="SEC6"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC5" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC7" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 2.1 Configuring the kernel </h2>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC7">2.1.1 Configuration of Linux kernels</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC8">2.1.2 Configuration of FreeBSD kernels</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC9">2.1.3 Configuration of OpenBSD kernels</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC10">2.1.4 Configuration of NetBSD kernels</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC11">2.1.5 Configuration of Solaris kernels</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC12">2.1.6 Configuration of Darwin (MacOS/X) kernels</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC13">2.1.7 Configuration of Windows</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Configuration-of-Linux-kernels"></a>
<a name="SEC7"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC6" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC8" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.1.1 Configuration of Linux kernels </h3>
<p>For tinc to work, you need a kernel that supports the Universal tun/tap device.
Most distributions come with kernels that already support this.
Here are the options you have to turn on when configuring a new kernel:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">Code maturity level options
[*] Prompt for development and/or incomplete code/drivers
Network device support
&lt;M&gt; Universal tun/tap device driver support
</pre></td></tr></table>
<p>It's not necessary to compile this driver as a module, even if you are going to
run more than one instance of tinc.
</p>
<p>If you decide to build the tun/tap driver as a kernel module, add these lines
to &lsquo;<tt>/etc/modules.conf</tt>&rsquo;:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">alias char-major-10-200 tun
</pre></td></tr></table>
<hr size="6">
<a name="Configuration-of-FreeBSD-kernels"></a>
<a name="SEC8"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC7" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC9" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.1.2 Configuration of FreeBSD kernels </h3>
<p>For FreeBSD version 4.1 and higher, tun and tap drivers are included in the default kernel configuration.
Using tap devices is recommended.
</p>
<hr size="6">
<a name="Configuration-of-OpenBSD-kernels"></a>
<a name="SEC9"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC8" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC10" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.1.3 Configuration of OpenBSD kernels </h3>
<p>For OpenBSD version 2.9 and higher,
the tun driver is included in the default kernel configuration.
There is also a kernel patch from <a href="http://diehard.n-r-g.com/stuff/openbsd/">http://diehard.n-r-g.com/stuff/openbsd/</a>
which adds a tap device to OpenBSD which should work with tinc,
but with recent versions of OpenBSD,
a tun device can act as a tap device by setting the link0 option with ifconfig.
</p>
<hr size="6">
<a name="Configuration-of-NetBSD-kernels"></a>
<a name="SEC10"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC9" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC11" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.1.4 Configuration of NetBSD kernels </h3>
<p>For NetBSD version 1.5.2 and higher,
the tun driver is included in the default kernel configuration.
</p>
<p>Tunneling IPv6 may not work on NetBSD's tun device.
</p>
<hr size="6">
<a name="Configuration-of-Solaris-kernels"></a>
<a name="SEC11"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC10" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC12" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.1.5 Configuration of Solaris kernels </h3>
<p>For Solaris 8 (SunOS 5.8) and higher,
the tun driver may or may not be included in the default kernel configuration.
If it isn't, the source can be downloaded from <a href="http://vtun.sourceforge.net/tun/">http://vtun.sourceforge.net/tun/</a>.
For x86 and sparc64 architectures, precompiled versions can be found at <a href="http://www.monkey.org/~dugsong/fragroute/">http://www.monkey.org/~dugsong/fragroute/</a>.
If the &lsquo;<tt>net/if_tun.h</tt>&rsquo; header file is missing, install it from the source package.
</p>
<hr size="6">
<a name="NOD12"></a>
<a name="SEC12"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC11" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC13" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.1.6 Configuration of Darwin (MacOS/X) kernels </h3>
<p>Tinc on Darwin relies on a tunnel driver for its data acquisition from the kernel.
Tinc supports either the driver from <a href="http://www-user.rhrk.uni-kl.de/~nissler/tuntap/">http://www-user.rhrk.uni-kl.de/~nissler/tuntap/</a>,
which supports both tun and tap style devices,
and also the driver from from <a href="http://chrisp.de/en/projects/tunnel.html">http://chrisp.de/en/projects/tunnel.html</a>.
The former driver is recommended.
The tunnel driver must be loaded before starting tinc with the following command:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">kmodload tunnel
</pre></td></tr></table>
<hr size="6">
<a name="Configuration-of-Windows"></a>
<a name="SEC13"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC12" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC14" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.1.7 Configuration of Windows </h3>
<p>You will need to install the latest TAP-Win32 driver from OpenVPN.
You can download it from <a href="http://openvpn.sourceforge.net">http://openvpn.sourceforge.net</a>.
Using the Network Connections control panel,
configure the TAP-Win32 network interface in the same way as you would do from the tinc-up script,
as explained in the rest of the documentation.
</p>
<hr size="6">
<a name="Libraries"></a>
<a name="SEC14"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC13" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC15" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 2.2 Libraries </h2>
<p>Before you can configure or build tinc, you need to have the OpenSSL,
zlib and lzo libraries installed on your system. If you try to configure tinc without
having them installed, configure will give you an error message, and stop.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC15">2.2.1 OpenSSL</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC17">2.2.2 zlib</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC18">2.2.3 lzo</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="OpenSSL"></a>
<a name="SEC15"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC14" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC17" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC14" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.2.1 OpenSSL </h3>
<p>For all cryptography-related functions, tinc uses the functions provided
by the OpenSSL library.
</p>
<p>If this library is not installed, you wil get an error when configuring
tinc for build. Support for running tinc without having OpenSSL
installed <em>may</em> be added in the future.
</p>
<p>You can use your operating system's package manager to install this if
available. Make sure you install the development AND runtime versions
of this package.
</p>
<p>If you have to install OpenSSL manually, you can get the source code
from <a href="http://www.openssl.org/">http://www.openssl.org/</a>. Instructions on how to configure,
build and install this package are included within the package. Please
make sure you build development and runtime libraries (which is the
default).
</p>
<p>If you installed the OpenSSL libraries from source, it may be necessary
to let configure know where they are, by passing configure one of the
&ndash;with-openssl-* parameters.
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">--with-openssl=DIR OpenSSL library and headers prefix
--with-openssl-include=DIR OpenSSL headers directory
(Default is OPENSSL_DIR/include)
--with-openssl-lib=DIR OpenSSL library directory
(Default is OPENSSL_DIR/lib)
</pre></td></tr></table>
<a name="SEC16"></a>
<h4 class="subsubheading"> License </h4>
<p>The complete source code of tinc is covered by the GNU GPL version 2.
Since the license under which OpenSSL is distributed is not directly
compatible with the terms of the GNU GPL
<a href="http://www.openssl.org/support/faq.html#LEGAL2">http://www.openssl.org/support/faq.html#LEGAL2</a>, we
include an exemption to the GPL (see also the file COPYING.README) to allow
everyone to create a statically or dynamically linked executable:
</p>
<blockquote><p>This program is released under the GPL with the additional exemption
that compiling, linking, and/or using OpenSSL is allowed. You may
provide binary packages linked to the OpenSSL libraries, provided that
all other requirements of the GPL are met.
</p></blockquote>
<p>Since the LZO library used by tinc is also covered by the GPL,
we also present the following exemption:
</p>
<blockquote><p>Hereby I grant a special exception to the tinc VPN project
(http://www.tinc-vpn.org/) to link the LZO library with the OpenSSL library
(http://www.openssl.org).
</p>
<p>Markus F.X.J. Oberhumer
</p></blockquote>
<hr size="6">
<a name="zlib"></a>
<a name="SEC17"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC15" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC18" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC14" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.2.2 zlib </h3>
<p>For the optional compression of UDP packets, tinc uses the functions provided
by the zlib library.
</p>
<p>If this library is not installed, you wil get an error when configuring
tinc for build. Support for running tinc without having zlib
installed <em>may</em> be added in the future.
</p>
<p>You can use your operating system's package manager to install this if
available. Make sure you install the development AND runtime versions
of this package.
</p>
<p>If you have to install zlib manually, you can get the source code
from <a href="http://www.gzip.org/zlib/">http://www.gzip.org/zlib/</a>. Instructions on how to configure,
build and install this package are included within the package. Please
make sure you build development and runtime libraries (which is the
default).
</p>
<hr size="6">
<a name="lzo"></a>
<a name="SEC18"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC17" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC14" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 2.2.3 lzo </h3>
<a name="IDX7"></a>
<p>Another form of compression is offered using the lzo library.
</p>
<p>If this library is not installed, you wil get an error when configuring
tinc for build. Support for running tinc without having lzo
installed <em>may</em> be added in the future.
</p>
<p>You can use your operating system's package manager to install this if
available. Make sure you install the development AND runtime versions
of this package.
</p>
<p>If you have to install lzo manually, you can get the source code
from <a href="http://www.oberhumer.com/opensource/lzo/">http://www.oberhumer.com/opensource/lzo/</a>. Instructions on how to configure,
build and install this package are included within the package. Please
make sure you build development and runtime libraries (which is the
default).
</p>
<hr size="6">
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_2.html#SEC19" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<p>
<font size="-1">
This document was generated by <em>Guus Sliepen</em> on <em>December, 26 2008</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.78</em></a>.
</font>
<br>
</p>
</body>
</html>

344
doc/tinc/tinc_2.html Normal file
View file

@ -0,0 +1,344 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on December, 26 2008 by texi2html 1.78 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
Olaf Bachmann <obachman@mathematik.uni-kl.de>
and many others.
Maintained by: Many creative people.
Send bugs and suggestions to <texi2html-bug@nongnu.org>
-->
<head>
<title>tinc Manual: 3. Installation</title>
<meta name="description" content="tinc Manual: 3. Installation">
<meta name="keywords" content="tinc Manual: 3. Installation">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.78">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.roman {font-family:serif; font-weight:normal;}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Installation"></a>
<a name="SEC19"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="tinc_1.html#SEC18" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC20" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_1.html#SEC5" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 3. Installation </h1>
<p>If you use Debian, you may want to install one of the
precompiled packages for your system. These packages are equipped with
system startup scripts and sample configurations.
</p>
<p>If you cannot use one of the precompiled packages, or you want to compile tinc
for yourself, you can use the source. The source is distributed under
the GNU General Public License (GPL). Download the source from the
<a href="http://www.tinc-vpn.org/download">download page</a>, which has
the checksums of these files listed; you may wish to check these with
md5sum before continuing.
</p>
<p>Tinc comes in a convenient autoconf/automake package, which you can just
treat the same as any other package. Which is just untar it, type
`./configure' and then `make'.
More detailed instructions are in the file &lsquo;<tt>INSTALL</tt>&rsquo;, which is
included in the source distribution.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC20">3.1 Building and installing tinc</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC24">3.2 System files</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Building-and-installing-tinc"></a>
<a name="SEC20"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC19" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC21" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC19" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC19" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 3.1 Building and installing tinc </h2>
<p>Detailed instructions on configuring the source, building tinc and installing tinc
can be found in the file called &lsquo;<tt>INSTALL</tt>&rsquo;.
</p>
<p>If you happen to have a binary package for tinc for your distribution,
you can use the package management tools of that distribution to install tinc.
The documentation that comes along with your distribution will tell you how to do that.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC21">3.1.1 Darwin (MacOS/X) build environment</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC22">3.1.2 Cygwin (Windows) build environment</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC23">3.1.3 MinGW (Windows) build environment</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="NOD20"></a>
<a name="SEC21"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC20" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC22" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC19" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC20" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 3.1.1 Darwin (MacOS/X) build environment </h3>
<p>In order to build tinc on Darwin, you need to install the MacOS/X Developer Tools
from <a href="http://developer.apple.com/tools/macosxtools.html">http://developer.apple.com/tools/macosxtools.html</a> and
a recent version of Fink from <a href="http://fink.sourceforge.net/">http://fink.sourceforge.net/</a>.
</p>
<p>After installation use fink to download and install the following packages:
autoconf25, automake, dlcompat, m4, openssl, zlib and lzo.
</p>
<hr size="6">
<a name="NOD21"></a>
<a name="SEC22"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC21" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC23" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC19" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC20" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 3.1.2 Cygwin (Windows) build environment </h3>
<p>If Cygwin hasn't already been installed, install it directly from
<a href="http://www.cygwin.com/">http://www.cygwin.com/</a>.
</p>
<p>When tinc is compiled in a Cygwin environment, it can only be run in this environment,
but all programs, including those started outside the Cygwin environment, will be able to use the VPN.
It will also support all features.
</p>
<hr size="6">
<a name="NOD22"></a>
<a name="SEC23"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC22" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC24" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC19" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC20" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 3.1.3 MinGW (Windows) build environment </h3>
<p>You will need to install the MinGW environment from <a href="http://www.mingw.org">http://www.mingw.org</a>.
</p>
<p>When tinc is compiled using MinGW it runs natively under Windows,
it is not necessary to keep MinGW installed.
</p>
<p>When detaching, tinc will install itself as a service,
which will be restarted automatically after reboots.
</p>
<hr size="6">
<a name="System-files"></a>
<a name="SEC24"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC23" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC25" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC19" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC19" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 3.2 System files </h2>
<p>Before you can run tinc, you must make sure you have all the needed
files on your system.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC25">3.2.1 Device files</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC26">3.2.2 Other files</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Device-files"></a>
<a name="SEC25"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC24" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC26" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC19" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC24" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 3.2.1 Device files </h3>
<p>Most operating systems nowadays come with the necessary device files by default,
or they have a mechanism to create them on demand.
</p>
<p>If you use Linux and do not have udev installed,
you may need to create the following device file if it does not exist:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">mknod -m 600 /dev/net/tun c 10 200
</pre></td></tr></table>
<hr size="6">
<a name="Other-files"></a>
<a name="SEC26"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC25" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC19" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC24" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 3.2.2 Other files </h3>
<a name="SEC27"></a>
<h4 class="subsubheading"> &lsquo;<tt>/etc/networks</tt>&rsquo; </h4>
<p>You may add a line to &lsquo;<tt>/etc/networks</tt>&rsquo; so that your VPN will get a
symbolic name. For example:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">myvpn 10.0.0.0
</pre></td></tr></table>
<a name="SEC28"></a>
<h4 class="subsubheading"> &lsquo;<tt>/etc/services</tt>&rsquo; </h4>
<a name="IDX8"></a>
<p>You may add this line to &lsquo;<tt>/etc/services</tt>&rsquo;. The effect is that you
may supply a &lsquo;<samp>tinc</samp>&rsquo; as a valid port number to some programs. The
number 655 is registered with the IANA.
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">tinc 655/tcp TINC
tinc 655/udp TINC
# Ivo Timmermans &lt;ivo@tinc-vpn.org&gt;
</pre></td></tr></table>
<hr size="6">
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC19" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<p>
<font size="-1">
This document was generated by <em>Guus Sliepen</em> on <em>December, 26 2008</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.78</em></a>.
</font>
<br>
</p>
</body>
</html>

1137
doc/tinc/tinc_3.html Normal file

File diff suppressed because it is too large Load diff

533
doc/tinc/tinc_4.html Normal file
View file

@ -0,0 +1,533 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on December, 26 2008 by texi2html 1.78 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
Olaf Bachmann <obachman@mathematik.uni-kl.de>
and many others.
Maintained by: Many creative people.
Send bugs and suggestions to <texi2html-bug@nongnu.org>
-->
<head>
<title>tinc Manual: 5. Running tinc</title>
<meta name="description" content="tinc Manual: 5. Running tinc">
<meta name="keywords" content="tinc Manual: 5. Running tinc">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.78">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.roman {font-family:serif; font-weight:normal;}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Running-tinc"></a>
<a name="SEC49"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="tinc_3.html#SEC42" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC50" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_3.html#SEC29" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 5. Running tinc </h1>
<p>If everything else is done, you can start tinc by typing the following command:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">tincd -n <var>netname</var>
</pre></td></tr></table>
<a name="IDX64"></a>
<p>Tinc will detach from the terminal and continue to run in the background like a good daemon.
If there are any problems however you can try to increase the debug level
and look in the syslog to find out what the problems are.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC50">5.1 Runtime options</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC51">5.2 Signals</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC52">5.3 Debug levels</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC53">5.4 Solving problems</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC54">5.5 Error messages</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC55">5.6 Sending bug reports</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Runtime-options"></a>
<a name="SEC50"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC49" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC51" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC49" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC49" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 5.1 Runtime options </h2>
<p>Besides the settings in the configuration file, tinc also accepts some
command line options.
</p>
<a name="IDX65"></a>
<a name="IDX66"></a>
<a name="IDX67"></a>
<dl compact="compact">
<dt> &lsquo;<samp>-c, --config=<var>path</var></samp>&rsquo;</dt>
<dd><p>Read configuration options from the directory <var>path</var>. The default is
&lsquo;<tt>/etc/tinc/<var>netname</var>/</tt>&rsquo;.
</p>
</dd>
<dt> &lsquo;<samp>-D, --no-detach</samp>&rsquo;</dt>
<dd><p>Don't fork and detach.
This will also disable the automatic restart mechanism for fatal errors.
</p>
</dd>
<dt> &lsquo;<samp>-d, --debug=<var>level</var></samp>&rsquo;</dt>
<dd><p>Set debug level to <var>level</var>. The higher the debug level, the more gets
logged. Everything goes via syslog.
</p>
</dd>
<dt> &lsquo;<samp>-k, --kill[=<var>signal</var>]</samp>&rsquo;</dt>
<dd><p>Attempt to kill a running tincd (optionally with the specified <var>signal</var> instead of SIGTERM) and exit.
Use it in conjunction with the -n option to make sure you kill the right tinc daemon.
Under native Windows the optional argument is ignored,
the service will always be stopped and removed.
</p>
</dd>
<dt> &lsquo;<samp>-n, --net=<var>netname</var></samp>&rsquo;</dt>
<dd><p>Use configuration for net <var>netname</var>. See section <a href="tinc_3.html#SEC31">Multiple networks</a>.
</p>
</dd>
<dt> &lsquo;<samp>-K, --generate-keys[=<var>bits</var>]</samp>&rsquo;</dt>
<dd><p>Generate public/private keypair of <var>bits</var> length. If <var>bits</var> is not specified,
1024 is the default. tinc will ask where you want to store the files,
but will default to the configuration directory (you can use the -c or -n option
in combination with -K). After that, tinc will quit.
</p>
</dd>
<dt> &lsquo;<samp>-L, --mlock</samp>&rsquo;</dt>
<dd><p>Lock tinc into main memory.
This will prevent sensitive data like shared private keys to be written to the system swap files/partitions.
</p>
</dd>
<dt> &lsquo;<samp>--logfile[=<var>file</var>]</samp>&rsquo;</dt>
<dd><p>Write log entries to a file instead of to the system logging facility.
If <var>file</var> is omitted, the default is &lsquo;<tt>/var/log/tinc.<var>netname</var>.log</tt>&rsquo;.
</p>
</dd>
<dt> &lsquo;<samp>--pidfile=<var>file</var></samp>&rsquo;</dt>
<dd><p>Write PID to <var>file</var> instead of &lsquo;<tt>/var/run/tinc.<var>netname</var>.pid</tt>&rsquo;.
</p>
</dd>
<dt> &lsquo;<samp>--bypass-security</samp>&rsquo;</dt>
<dd><p>Disables encryption and authentication.
Only useful for debugging.
</p>
</dd>
<dt> &lsquo;<samp>--help</samp>&rsquo;</dt>
<dd><p>Display a short reminder of these runtime options and terminate.
</p>
</dd>
<dt> &lsquo;<samp>--version</samp>&rsquo;</dt>
<dd><p>Output version information and exit.
</p>
</dd>
</dl>
<hr size="6">
<a name="Signals"></a>
<a name="SEC51"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC50" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC52" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC49" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC49" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 5.2 Signals </h2>
<p>You can also send the following signals to a running tincd process:
</p>
<dl compact="compact">
<dt> &lsquo;<samp>ALRM</samp>&rsquo;</dt>
<dd><p>Forces tinc to try to connect to all uplinks immediately.
Usually tinc attempts to do this itself,
but increases the time it waits between the attempts each time it failed,
and if tinc didn't succeed to connect to an uplink the first time after it started,
it defaults to the maximum time of 15 minutes.
</p>
</dd>
<dt> &lsquo;<samp>HUP</samp>&rsquo;</dt>
<dd><p>Partially rereads configuration files.
Connections to hosts whose host config file are removed are closed.
New outgoing connections specified in &lsquo;<tt>tinc.conf</tt>&rsquo; will be made.
</p>
</dd>
<dt> &lsquo;<samp>INT</samp>&rsquo;</dt>
<dd><p>Temporarily increases debug level to 5.
Send this signal again to revert to the original level.
</p>
</dd>
<dt> &lsquo;<samp>USR1</samp>&rsquo;</dt>
<dd><p>Dumps the connection list to syslog.
</p>
</dd>
<dt> &lsquo;<samp>USR2</samp>&rsquo;</dt>
<dd><p>Dumps virtual network device statistics, all known nodes, edges and subnets to syslog.
</p>
</dd>
<dt> &lsquo;<samp>WINCH</samp>&rsquo;</dt>
<dd><p>Purges all information remembered about unreachable nodes.
</p>
</dd>
</dl>
<hr size="6">
<a name="Debug-levels"></a>
<a name="SEC52"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC51" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC53" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC49" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC49" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 5.3 Debug levels </h2>
<p>The tinc daemon can send a lot of messages to the syslog.
The higher the debug level, the more messages it will log.
Each level inherits all messages of the previous level:
</p>
<dl compact="compact">
<dt> &lsquo;<samp>0</samp>&rsquo;</dt>
<dd><p>This will log a message indicating tinc has started along with a version number.
It will also log any serious error.
</p>
</dd>
<dt> &lsquo;<samp>1</samp>&rsquo;</dt>
<dd><p>This will log all connections that are made with other tinc daemons.
</p>
</dd>
<dt> &lsquo;<samp>2</samp>&rsquo;</dt>
<dd><p>This will log status and error messages from scripts and other tinc daemons.
</p>
</dd>
<dt> &lsquo;<samp>3</samp>&rsquo;</dt>
<dd><p>This will log all requests that are exchanged with other tinc daemons. These include
authentication, key exchange and connection list updates.
</p>
</dd>
<dt> &lsquo;<samp>4</samp>&rsquo;</dt>
<dd><p>This will log a copy of everything received on the meta socket.
</p>
</dd>
<dt> &lsquo;<samp>5</samp>&rsquo;</dt>
<dd><p>This will log all network traffic over the virtual private network.
</p>
</dd>
</dl>
<hr size="6">
<a name="Solving-problems"></a>
<a name="SEC53"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC52" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC54" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC49" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC49" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 5.4 Solving problems </h2>
<p>If tinc starts without problems, but if the VPN doesn't work, you will have to find the cause of the problem.
The first thing to do is to start tinc with a high debug level in the foreground,
so you can directly see everything tinc logs:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">tincd -n <var>netname</var> -d5 -D
</pre></td></tr></table>
<p>If tinc does not log any error messages, then you might want to check the following things:
</p>
<ul class="toc">
<li> &lsquo;<tt>tinc-up</tt>&rsquo; script
Does this script contain the right commands?
Normally you must give the interface the address of this host on the VPN, and the netmask must be big enough so that the entire VPN is covered.
</li><li> Subnet
Does the Subnet (or Subnets) in the host configuration file of this host match the portion of the VPN that belongs to this host?
</li><li> Firewalls and NATs
Do you have a firewall or a NAT device (a masquerading firewall or perhaps an ADSL router that performs masquerading)?
If so, check that it allows TCP and UDP traffic on port 655.
If it masquerades and the host running tinc is behind it, make sure that it forwards TCP and UDP traffic to port 655 to the host running tinc.
You can add &lsquo;<samp>TCPOnly = yes</samp>&rsquo; to your host config file to force tinc to only use a single TCP connection,
this works through most firewalls and NATs.
</li></ul>
<hr size="6">
<a name="Error-messages"></a>
<a name="SEC54"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC53" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC55" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC49" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC49" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 5.5 Error messages </h2>
<p>What follows is a list of the most common error messages you might find in the logs.
Some of them will only be visible if the debug level is high enough.
</p>
<dl compact="compact">
<dt> &lsquo;<samp>Could not open /dev/tap0: No such device</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> You forgot to `modprobe netlink_dev' or `modprobe ethertap'.
</li><li> You forgot to compile `Netlink device emulation' in the kernel.
</li></ul>
</dd>
<dt> &lsquo;<samp>Can't write to /dev/net/tun: No such device</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> You forgot to `modprobe tun'.
</li><li> You forgot to compile `Universal TUN/TAP driver' in the kernel.
</li><li> The tun device is located somewhere else in &lsquo;<tt>/dev/</tt>&rsquo;.
</li></ul>
</dd>
<dt> &lsquo;<samp>Network address and prefix length do not match!</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> The Subnet field must contain a <em>network</em> address, trailing bits should be 0.
</li><li> If you only want to use one IP address, set the netmask to /32.
</li></ul>
</dd>
<dt> &lsquo;<samp>Error reading RSA key file `rsa_key.priv': No such file or directory</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> You forgot to create a public/private keypair.
</li><li> Specify the complete pathname to the private key file with the &lsquo;<samp>PrivateKeyFile</samp>&rsquo; option.
</li></ul>
</dd>
<dt> &lsquo;<samp>Warning: insecure file permissions for RSA private key file `rsa_key.priv'!</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> The private key file is readable by users other than root.
Use chmod to correct the file permissions.
</li></ul>
</dd>
<dt> &lsquo;<samp>Creating metasocket failed: Address family not supported</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> By default tinc tries to create both IPv4 and IPv6 sockets.
On some platforms this might not be implemented.
If the logs show &lsquo;<samp>Ready</samp>&rsquo; later on, then at least one metasocket was created,
and you can ignore this message.
You can add &lsquo;<samp>AddressFamily = ipv4</samp>&rsquo; to &lsquo;<tt>tinc.conf</tt>&rsquo; to prevent this from happening.
</li></ul>
</dd>
<dt> &lsquo;<samp>Cannot route packet: unknown IPv4 destination 1.2.3.4</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> You try to send traffic to a host on the VPN for which no Subnet is known.
</li><li> If it is a broadcast address (ending in .255), it probably is a samba server or a Windows host sending broadcast packets.
You can ignore it.
</li></ul>
</dd>
<dt> &lsquo;<samp>Cannot route packet: ARP request for unknown address 1.2.3.4</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> You try to send traffic to a host on the VPN for which no Subnet is known.
</li></ul>
</dd>
<dt> &lsquo;<samp>Packet with destination 1.2.3.4 is looping back to us!</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> Something is not configured right. Packets are being sent out to the
virtual network device, but according to the Subnet directives in your host configuration
file, those packets should go to your own host. Most common mistake is that
you have a Subnet line in your host configuration file with a prefix length which is
just as large as the prefix of the virtual network interface. The latter should in almost all
cases be larger. Rethink your configuration.
Note that you will only see this message if you specified a debug
level of 5 or higher!
</li><li> Chances are that a &lsquo;<samp>Subnet = ...</samp>&rsquo; line in the host configuration file of this tinc daemon is wrong.
Change it to a subnet that is accepted locally by another interface,
or if that is not the case, try changing the prefix length into /32.
</li></ul>
</dd>
<dt> &lsquo;<samp>Node foo (1.2.3.4) is not reachable</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> Node foo does not have a connection anymore, its tinc daemon is not running or its connection to the Internet is broken.
</li></ul>
</dd>
<dt> &lsquo;<samp>Received UDP packet from unknown source 1.2.3.4 (port 12345)</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> If you see this only sporadically, it is harmless and caused by a node sending packets using an old key.
</li><li> If you see this often and another node is not reachable anymore, then a NAT (masquerading firewall) is changing the source address of UDP packets.
You can add &lsquo;<samp>TCPOnly = yes</samp>&rsquo; to host configuration files to force all VPN traffic to go over a TCP connection.
</li></ul>
</dd>
<dt> &lsquo;<samp>Got bad/bogus/unauthorized REQUEST from foo (1.2.3.4 port 12345)</samp>&rsquo;</dt>
<dd>
<ul class="toc">
<li> Node foo does not have the right public/private keypair.
Generate new keypairs and distribute them again.
</li><li> An attacker tries to gain access to your VPN.
</li><li> A network error caused corruption of metadata sent from foo.
</li></ul>
</dd>
</dl>
<hr size="6">
<a name="Sending-bug-reports"></a>
<a name="SEC55"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC54" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC49" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC49" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 5.6 Sending bug reports </h2>
<p>If you really can't find the cause of a problem, or if you suspect tinc is not working right,
you can send us a bugreport, see <a href="tinc_7.html#SEC69">Contact information</a>.
Be sure to include the following information in your bugreport:
</p>
<ul class="toc">
<li> A clear description of what you are trying to achieve and what the problem is.
</li><li> What platform (operating system, version, hardware architecture) and which version of tinc you use.
</li><li> If compiling tinc fails, a copy of &lsquo;<tt>config.log</tt>&rsquo; and the error messages you get.
</li><li> Otherwise, a copy of &lsquo;<tt>tinc.conf</tt>&rsquo;, &lsquo;<tt>tinc-up</tt>&rsquo; and all files in the &lsquo;<tt>hosts/</tt>&rsquo; directory.
</li><li> The output of the commands &lsquo;<samp>ifconfig -a</samp>&rsquo; and &lsquo;<samp>route -n</samp>&rsquo; (or &lsquo;<samp>netstat -rn</samp>&rsquo; if that doesn't work).
</li><li> The output of any command that fails to work as it should (like ping or traceroute).
</li></ul>
<hr size="6">
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC49" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<p>
<font size="-1">
This document was generated by <em>Guus Sliepen</em> on <em>December, 26 2008</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.78</em></a>.
</font>
<br>
</p>
</body>
</html>

655
doc/tinc/tinc_5.html Normal file
View file

@ -0,0 +1,655 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on December, 26 2008 by texi2html 1.78 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
Olaf Bachmann <obachman@mathematik.uni-kl.de>
and many others.
Maintained by: Many creative people.
Send bugs and suggestions to <texi2html-bug@nongnu.org>
-->
<head>
<title>tinc Manual: 6. Technical information</title>
<meta name="description" content="tinc Manual: 6. Technical information">
<meta name="keywords" content="tinc Manual: 6. Technical information">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.78">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.roman {font-family:serif; font-weight:normal;}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Technical-information"></a>
<a name="SEC56"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="tinc_4.html#SEC55" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC57" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_4.html#SEC49" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 6. Technical information </h1>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC57">6.1 The connection</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC60">6.2 The meta-protocol</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC61">6.3 Security</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="The-connection"></a>
<a name="SEC57"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC56" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC58" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC56" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 6.1 The connection </h2>
<p>Tinc is a daemon that takes VPN data and transmit that to another host
computer over the existing Internet infrastructure.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC58">6.1.1 The UDP tunnel</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC59">6.1.2 The meta-connection</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="The-UDP-tunnel"></a>
<a name="SEC58"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC57" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC59" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC57" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 6.1.1 The UDP tunnel </h3>
<a name="IDX68"></a>
<p>The data itself is read from a character device file, the so-called
<em>virtual network device</em>. This device is associated with a network
interface. Any data sent to this interface can be read from the device,
and any data written to the device gets sent from the interface.
There are two possible types of virtual network devices:
`tun' style, which are point-to-point devices which can only handle IPv4 and/or IPv6 packets,
and `tap' style, which are Ethernet devices and handle complete Ethernet frames.
</p>
<p>So when tinc reads an Ethernet frame from the device, it determines its
type. When tinc is in it's default routing mode, it can handle IPv4 and IPv6
packets. Depending on the Subnet lines, it will send the packets off to their destination IP address.
In the `switch' and `hub' mode, tinc will use broadcasts and MAC address discovery
to deduce the destination of the packets.
Since the latter modes only depend on the link layer information,
any protocol that runs over Ethernet is supported (for instance IPX and Appletalk).
However, only `tap' style devices provide this information.
</p>
<p>After the destination has been determined,
the packet will be compressed (optionally),
a sequence number will be added to the packet,
the packet will then be encrypted
and a message authentication code will be appended.
</p>
<a name="IDX69"></a>
<a name="IDX70"></a>
<p>When that is done, time has come to actually transport the
packet to the destination computer. We do this by sending the packet
over an UDP connection to the destination host. This is called
<em>encapsulating</em>, the VPN packet (though now encrypted) is
encapsulated in another IP datagram.
</p>
<p>When the destination receives this packet, the same thing happens, only
in reverse. So it checks the message authentication code, decrypts the contents of the UDP datagram,
checks the sequence number
and writes the decrypted information to its own virtual network device.
</p>
<p>If the virtual network device is a `tun' device (a point-to-point tunnel),
there is no problem for the kernel to accept a packet.
However, if it is a `tap' device (this is the only available type on FreeBSD),
the destination MAC address must match that of the virtual network interface.
If tinc is in it's default routing mode, ARP does not work, so the correct destination MAC
can not be known by the sending host.
Tinc solves this by letting the receiving end detect the MAC address of its own virtual network interface
and overwriting the destination MAC address of the received packet.
</p>
<p>In switch or hub modes ARP does work so the sender already knows the correct destination MAC address.
In those modes every interface should have a unique MAC address, so make sure they are not the same.
Because switch and hub modes rely on MAC addresses to function correctly,
these modes cannot be used on the following operating systems which don't have a `tap' style virtual network device:
OpenBSD, NetBSD, Darwin and Solaris.
</p>
<hr size="6">
<a name="The-meta_002dconnection"></a>
<a name="SEC59"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC58" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC60" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC57" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 6.1.2 The meta-connection </h3>
<p>Having only a UDP connection available is not enough. Though suitable
for transmitting data, we want to be able to reliably send other
information, such as routing and session key information to somebody.
</p>
<a name="IDX71"></a>
<p>TCP is a better alternative, because it already contains protection
against information being lost, unlike UDP.
</p>
<p>So we establish two connections. One for the encrypted VPN data, and one
for other information, the meta-data. Hence, we call the second
connection the meta-connection. We can now be sure that the
meta-information doesn't get lost on the way to another computer.
</p>
<a name="IDX72"></a>
<a name="IDX73"></a>
<p>Like with any communication, we must have a protocol, so that everybody
knows what everything stands for, and how she should react. Because we
have two connections, we also have two protocols. The protocol used for
the UDP data is the &ldquo;data-protocol,&rdquo; the other one is the
&ldquo;meta-protocol.&rdquo;
</p>
<p>The reason we don't use TCP for both protocols is that UDP is much
better for encapsulation, even while it is less reliable. The real
problem is that when TCP would be used to encapsulate a TCP stream
that's on the private network, for every packet sent there would be
three ACKs sent instead of just one. Furthermore, if there would be
a timeout, both TCP streams would sense the timeout, and both would
start re-sending packets.
</p>
<hr size="6">
<a name="The-meta_002dprotocol"></a>
<a name="SEC60"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC59" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC61" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC56" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 6.2 The meta-protocol </h2>
<p>The meta protocol is used to tie all tinc daemons together, and
exchange information about which tinc daemon serves which virtual
subnet.
</p>
<p>The meta protocol consists of requests that can be sent to the other
side. Each request has a unique number and several parameters. All
requests are represented in the standard ASCII character set. It is
possible to use tools such as telnet or netcat to connect to a tinc
daemon started with the &ndash;bypass-security option
and to read and write requests by hand, provided that one
understands the numeric codes sent.
</p>
<p>The authentication scheme is described in <a href="#SEC62">Authentication protocol</a>. After a
successful authentication, the server and the client will exchange all the
information about other tinc daemons and subnets they know of, so that both
sides (and all the other tinc daemons behind them) have their information
synchronised.
</p>
<a name="IDX74"></a>
<a name="IDX75"></a>
<table><tr><td>&nbsp;</td><td><pre class="example">message
------------------------------------------------------------------
ADD_EDGE node1 node2 21.32.43.54 655 222 0
| | | | | +-&gt; options
| | | | +----&gt; weight
| | | +--------&gt; UDP port of node2
| | +----------------&gt; real address of node2
| +-------------------------&gt; name of destination node
+-------------------------------&gt; name of source node
ADD_SUBNET node 192.168.1.0/24
| | +--&gt; prefixlength
| +--------&gt; network address
+------------------&gt; owner of this subnet
------------------------------------------------------------------
</pre></td></tr></table>
<p>The ADD_EDGE messages are to inform other tinc daemons that a connection between
two nodes exist. The address of the destination node is available so that
VPN packets can be sent directly to that node.
</p>
<p>The ADD_SUBNET messages inform other tinc daemons that certain subnets belong
to certain nodes. tinc will use it to determine to which node a VPN packet has
to be sent.
</p>
<a name="IDX76"></a>
<a name="IDX77"></a>
<table><tr><td>&nbsp;</td><td><pre class="example">message
------------------------------------------------------------------
DEL_EDGE node1 node2
| +----&gt; name of destination node
+----------&gt; name of source node
DEL_SUBNET node 192.168.1.0/24
| | +--&gt; prefixlength
| +--------&gt; network address
+------------------&gt; owner of this subnet
------------------------------------------------------------------
</pre></td></tr></table>
<p>In case a connection between two daemons is closed or broken, DEL_EDGE messages
are sent to inform the other daemons of that fact. Each daemon will calculate a
new route to the the daemons, or mark them unreachable if there isn't any.
</p>
<a name="IDX78"></a>
<a name="IDX79"></a>
<a name="IDX80"></a>
<table><tr><td>&nbsp;</td><td><pre class="example">message
------------------------------------------------------------------
REQ_KEY origin destination
| +--&gt; name of the tinc daemon it wants the key from
+----------&gt; name of the daemon that wants the key
ANS_KEY origin destination 4ae0b0a82d6e0078 91 64 4
| | \______________/ | | +--&gt; MAC length
| | | | +-----&gt; digest algorithm
| | | +--------&gt; cipher algorithm
| | +--&gt; 128 bits key
| +--&gt; name of the daemon that wants the key
+----------&gt; name of the daemon that uses this key
KEY_CHANGED origin
+--&gt; daemon that has changed it's packet key
------------------------------------------------------------------
</pre></td></tr></table>
<p>The keys used to encrypt VPN packets are not sent out directly. This is
because it would generate a lot of traffic on VPNs with many daemons, and
chances are that not every tinc daemon will ever send a packet to every
other daemon. Instead, if a daemon needs a key it sends a request for it
via the meta connection of the nearest hop in the direction of the
destination.
</p>
<a name="IDX81"></a>
<table><tr><td>&nbsp;</td><td><pre class="example">daemon message
------------------------------------------------------------------
origin PING
dest. PONG
------------------------------------------------------------------
</pre></td></tr></table>
<p>There is also a mechanism to check if hosts are still alive. Since network
failures or a crash can cause a daemon to be killed without properly
shutting down the TCP connection, this is necessary to keep an up to date
connection list. PINGs are sent at regular intervals, except when there
is also some other traffic. A little bit of salt (random data) is added
with each PING and PONG message, to make sure that long sequences of PING/PONG
messages without any other traffic won't result in known plaintext.
</p>
<p>This basically covers what is sent over the meta connection by tinc.
</p>
<hr size="6">
<a name="Security"></a>
<a name="SEC61"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC60" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC62" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC56" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 6.3 Security </h2>
<a name="IDX82"></a>
<p>Tinc got its name from &ldquo;TINC,&rdquo; short for <em>There Is No Cabal</em>; the
alleged Cabal was/is an organisation that was said to keep an eye on the
entire Internet. As this is exactly what you <em>don't</em> want, we named
the tinc project after TINC.
</p>
<p>But in order to be &ldquo;immune&rdquo; to eavesdropping, you'll have to encrypt
your data. Because tinc is a <em>Secure</em> VPN (SVPN) daemon, it does
exactly that: encrypt.
Tinc by default uses blowfish encryption with 128 bit keys in CBC mode, 32 bit
sequence numbers and 4 byte long message authentication codes to make sure
eavesdroppers cannot get and cannot change any information at all from the
packets they can intercept. The encryption algorithm and message authentication
algorithm can be changed in the configuration. The length of the message
authentication codes is also adjustable. The length of the key for the
encryption algorithm is always the default length used by OpenSSL.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC62">6.3.1 Authentication protocol</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC63">6.3.2 Encryption of network packets</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC64">6.3.3 Security issues</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Authentication-protocol"></a>
<a name="SEC62"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC61" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC63" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC61" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 6.3.1 Authentication protocol </h3>
<a name="IDX83"></a>
<p>A new scheme for authentication in tinc has been devised, which offers some
improvements over the protocol used in 1.0pre2 and 1.0pre3. Explanation is
below.
</p>
<a name="IDX84"></a>
<a name="IDX85"></a>
<a name="IDX86"></a>
<a name="IDX87"></a>
<table><tr><td>&nbsp;</td><td><pre class="example">daemon message
--------------------------------------------------------------------------
client &lt;attempts connection&gt;
server &lt;accepts connection&gt;
client ID client 12
| +---&gt; version
+-------&gt; name of tinc daemon
server ID server 12
| +---&gt; version
+-------&gt; name of tinc daemon
client META_KEY 5f0823a93e35b69e...7086ec7866ce582b
\_________________________________/
+-&gt; RSAKEYLEN bits totally random string S1,
encrypted with server's public RSA key
server META_KEY 6ab9c1640388f8f0...45d1a07f8a672630
\_________________________________/
+-&gt; RSAKEYLEN bits totally random string S2,
encrypted with client's public RSA key
From now on:
- the client will symmetrically encrypt outgoing traffic using S1
- the server will symmetrically encrypt outgoing traffic using S2
client CHALLENGE da02add1817c1920989ba6ae2a49cecbda0
\_________________________________/
+-&gt; CHALLEN bits totally random string H1
server CHALLENGE 57fb4b2ccd70d6bb35a64c142f47e61d57f
\_________________________________/
+-&gt; CHALLEN bits totally random string H2
client CHAL_REPLY 816a86
+-&gt; 160 bits SHA1 of H2
server CHAL_REPLY 928ffe
+-&gt; 160 bits SHA1 of H1
After the correct challenge replies are received, both ends have proved
their identity. Further information is exchanged.
client ACK 655 123 0
| | +-&gt; options
| +----&gt; estimated weight
+--------&gt; listening port of client
server ACK 655 321 0
| | +-&gt; options
| +----&gt; estimated weight
+--------&gt; listening port of server
--------------------------------------------------------------------------
</pre></td></tr></table>
<p>This new scheme has several improvements, both in efficiency and security.
</p>
<p>First of all, the server sends exactly the same kind of messages over the wire
as the client. The previous versions of tinc first authenticated the client,
and then the server. This scheme even allows both sides to send their messages
simultaneously, there is no need to wait for the other to send something first.
This means that any calculations that need to be done upon sending or receiving
a message can also be done in parallel. This is especially important when doing
RSA encryption/decryption. Given that these calculations are the main part of
the CPU time spent for the authentication, speed is improved by a factor 2.
</p>
<p>Second, only one RSA encrypted message is sent instead of two. This reduces the
amount of information attackers can see (and thus use for a cryptographic
attack). It also improves speed by a factor two, making the total speedup a
factor 4.
</p>
<p>Third, and most important:
The symmetric cipher keys are exchanged first, the challenge is done
afterwards. In the previous authentication scheme, because a man-in-the-middle
could pass the challenge/chal_reply phase (by just copying the messages between
the two real tinc daemons), but no information was exchanged that was really
needed to read the rest of the messages, the challenge/chal_reply phase was of
no real use. The man-in-the-middle was only stopped by the fact that only after
the ACK messages were encrypted with the symmetric cipher. Potentially, it
could even send it's own symmetric key to the server (if it knew the server's
public key) and read some of the metadata the server would send it (it was
impossible for the mitm to read actual network packets though). The new scheme
however prevents this.
</p>
<p>This new scheme makes sure that first of all, symmetric keys are exchanged. The
rest of the messages are then encrypted with the symmetric cipher. Then, each
side can only read received messages if they have their private key. The
challenge is there to let the other side know that the private key is really
known, because a challenge reply can only be sent back if the challenge is
decrypted correctly, and that can only be done with knowledge of the private
key.
</p>
<p>Fourth: the first thing that is sent via the symmetric cipher encrypted
connection is a totally random string, so that there is no known plaintext (for
an attacker) in the beginning of the encrypted stream.
</p>
<hr size="6">
<a name="Encryption-of-network-packets"></a>
<a name="SEC63"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC62" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC64" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC61" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 6.3.2 Encryption of network packets </h3>
<a name="IDX88"></a>
<p>A data packet can only be sent if the encryption key is known to both
parties, and the connection is activated. If the encryption key is not
known, a request is sent to the destination using the meta connection
to retrieve it. The packet is stored in a queue while waiting for the
key to arrive.
</p>
<p>The UDP packet containing the network packet from the VPN has the following layout:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">... | IP header | UDP header | seqno | VPN packet | MAC | UDP trailer
\___________________/\_____/
| |
V +---&gt; digest algorithm
Encrypted with symmetric cipher
</pre></td></tr></table>
<p>So, the entire VPN packet is encrypted using a symmetric cipher, including a 32 bits
sequence number that is added in front of the actual VPN packet, to act as a unique
IV for each packet and to prevent replay attacks. A message authentication code
is added to the UDP packet to prevent alteration of packets. By default the
first 4 bytes of the digest are used for this, but this can be changed using
the MACLength configuration variable.
</p>
<hr size="6">
<a name="Security-issues"></a>
<a name="SEC64"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC63" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC61" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection"> 6.3.3 Security issues </h3>
<p>In August 2000, we discovered the existence of a security hole in all versions
of tinc up to and including 1.0pre2. This had to do with the way we exchanged
keys. Since then, we have been working on a new authentication scheme to make
tinc as secure as possible. The current version uses the OpenSSL library and
uses strong authentication with RSA keys.
</p>
<p>On the 29th of December 2001, Jerome Etienne posted a security analysis of tinc
1.0pre4. Due to a lack of sequence numbers and a message authentication code
for each packet, an attacker could possibly disrupt certain network services or
launch a denial of service attack by replaying intercepted packets. The current
version adds sequence numbers and message authentication codes to prevent such
attacks.
</p>
<p>On the 15th of September 2003, Peter Gutmann posted a security analysis of tinc
1.0.1. He argues that the 32 bit sequence number used by tinc is not a good IV,
that tinc's default length of 4 bytes for the MAC is too short, and he doesn't
like tinc's use of RSA during authentication. We do not know of a security hole
in this version of tinc, but tinc's security is not as strong as TLS or IPsec.
We will address these issues in tinc 2.0.
</p>
<p>Cryptography is a hard thing to get right. We cannot make any
guarantees. Time, review and feedback are the only things that can
prove the security of any cryptographic product. If you wish to review
tinc or give us feedback, you are stronly encouraged to do so.
</p>
<hr size="6">
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_6.html#SEC65" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<p>
<font size="-1">
This document was generated by <em>Guus Sliepen</em> on <em>December, 26 2008</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.78</em></a>.
</font>
<br>
</p>
</body>
</html>

82
doc/tinc/tinc_6.html Normal file
View file

@ -0,0 +1,82 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on December, 26 2008 by texi2html 1.78 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
Olaf Bachmann <obachman@mathematik.uni-kl.de>
and many others.
Maintained by: Many creative people.
Send bugs and suggestions to <texi2html-bug@nongnu.org>
-->
<head>
<title>tinc Manual: 7. Platform specific information</title>
<meta name="description" content="tinc Manual: 7. Platform specific information">
<meta name="keywords" content="tinc Manual: 7. Platform specific information">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.78">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.roman {font-family:serif; font-weight:normal;}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Platform-specific-information"></a>
<a name="SEC65"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="tinc_5.html#SEC64" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC66" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_5.html#SEC56" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_7.html#SEC68" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="tinc_0.html#SEC1" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="tinc_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="tinc_8.html#SEC71" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="tinc_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 7. Platform specific information </h1>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC66">7.1 Interface configuration</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC67">7.2 Routes</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Interface-configuration"></a>
<a name="SEC66"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC65" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC67" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#SEC65" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#SEC65" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="tinc_7.html#SEC68" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middl