tinc/doc/tincd.8

.Dd 2002-03-25
.Dt TINCD 8
.\" Manual page created by:
.\" Ivo Timmermans <ivo@o2w.nl>
.\" Guus Sliepen <guus@sliepen.eu.org>
.Sh NAME
.Nm tincd
.Nd tinc VPN daemon
.Sh SYNOPSIS
.Nm
.Op Fl cdDkKn
.Op Fl -bypass-security
.Op Fl -config Ns = Ns Ar DIR
.Op Fl -debug Ns = Ns Ar LEVEL
.Op Fl -generate-keys Ns Op = Ns Ar BITS
.Op Fl -help
.Op Fl -kill Ns = Ns Ar SIGNAL
.Op Fl -net Ns = Ns Ar NETNAME
.Op Fl -no-detach
.Op Fl -version
.Sh DESCRIPTION
This is the daemon of tinc, a secure virtual private network (VPN) project.
When started,
.Nm
will read it's configuration file to determine what virtual subnets it has to serve
and to what other tinc daemons it should connect.
It will connect to the ethertap or tun/tap device
and set up a socket for incoming connections.
Optionally a script will be executed to further configure the virtual device.
If that succeeds,
it will detach from the controlling terminal and continue in the background,
accepting and setting up connections to other tinc daemons
that are part of the virtual private network.
.Sh OPTIONS
.Bl -tag -width indent
.It Fl -bypass-security
Disables encryption and authentication.
Only useful for debugging.
.It Fl c, -config Ns = Ns Ar DIR
Read configuration options from
.Ar DIR .
.It Fl d, -debug Ns Op = Ns Ar LEVEL
Increase debug level or set it to
.Ar LEVEL
(see below).
.It Fl K, -generate-keys Ns Op = Ns Ar BITS
Generate public/private RSA keypair and exit.
If
.Ar BITS
is omitted, the default length will be 1024 bits.
.It Fl -help
Display short list of options.
.It Fl k, -kill Ns Op = Ns Ar SIGNAL
Attempt to kill a running
.Nm
(optionally with the specified
.Ar SIGNAL
instead of SIGTERM) and exit.
.It Fl n, -net Ns = Ns Ar NETNAME
Connect to net
.Ar NETNAME .
.It Fl D, -no-detach
Don't fork and detach.
This will also disable the automatic restart mechanism for fatal errors.
.It Fl L, -mlock
Lock tinc into main memory.
This will prevent sensitive data like shared private keys to be written to the system swap files/partitions.
.It Fl -version
Output version information and exit.
.El
.Sh SIGNALS
.Bl -tag -width indent
.It ALRM
Forces
.Nm
to try to connect to all uplinks immediately.
Usually
.Nm
attempts to do this itself,
but increases the time it waits between the attempts each time it failed,
and if
.Nm
didn't succeed to connect to an uplink the first time after it started,
it defaults to the maximum time of 15 minutes.
.It HUP
Closes all connections, rereads the configuration file and restarts the daemon.
.It INT
Temporarily increases debug level to 5.
Send this signal again to revert to the original level.
.It USR1
Dumps the connection list to syslog.
.It USR2
Dumps virtual network device statistics, all known nodes, edges and subnets to syslog.
.It WINCH
Purges all information remembered about unreachable nodes.
.El
.Sh DEBUG LEVELS
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:
.Bl -tag -width indent
.It 0
This will log a message indicating
.Nm
has started along with a version number.
It will also any serious error.
.It 1
This will log all connections that are made with other tinc daemons.
.It 2
This will log status and error messages from other tinc daemons.
.It 3
This will log all requests that are exchanged with other tinc daemons. These include
authentication, key exchange and connection list updates.
.It 4
This will log a copy of everything received on the meta socket.
.It 5
This will log all network traffic over the virtual private network.
.El
.Sh FILES
.Bl -tag -width indent
.It Pa /etc/tinc/ Ns Ar NETNAME Ns Pa /tinc.conf
The configuration file for
.Nm .
.It Pa /etc/tinc/ Ns Ar NETNAME Ns Pa /tinc-up
Script which is executed as soon as the virtual network device has been allocated.
Purpose is to further configure that device.
.It Pa /etc/tinc/ Ns Ar NETNAME Ns Pa /tinc-down
Script which is executed when
.Nm
exits.
Purpose is to cleanly shut down the virtual network device before it will be deallocated.
.It Pa /etc/tinc/ Ns Ar NETNAME Ns Pa /hosts/*
The directory containing the host configuration files
used to authenticate other tinc daemons.
.It Pa /etc/tinc/ Ns Ar NETNAME Ns Pa /hosts/ Ns Ar NAME Ns Pa -up
Script which is executed as soon as host
.Ar NAME
becomes reachable.
.It Pa /etc/tinc/ Ns Ar NETNAME Ns Pa /hosts/ Ns Ar NAME Ns Pa -down
Script which is executed as soon as host
.Ar NAME
becomes unreachable.
.It Pa /var/run/tinc. Ns Ar NETNAME Ns Pa .pid
The PID of the currently running
.Nm
is stored in this file.
.El
.Sh BUGS
The
.Va BindToInterface
option may not work correctly.
.Pp
.Sy The cryptography in tinc is not well tested yet. Use it at your own risk!
.Pp
If you find any bugs, report them to tinc@nl.linux.org.
.Sh TODO
A lot, especially security auditing.
.Sh SEE ALSO
.Xr tinc.conf 5 ,
.Pa http://tinc.nl.linux.org/ ,
.Pa http://www.cabal.org/ .
.Pp
The full documentation for tinc 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
tinc comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it under certain conditions;
see the file COPYING for details.
.Sh AUTHORS
.An "Ivo Timmermans" Aq ivo@o2w.nl
.An "Guus Sliepen" Aq guus@sliepen.eu.org
.Pp
And thanks to many others for their contributions to tinc!