diff --git a/src/conf.c b/src/conf.c
index 4108d8ba..5dc70171 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -328,6 +328,11 @@ int read_config_file(splay_tree_t *config_tree, const char *fname) {
 	buffer = xmalloc(bufsize);
 
 	for(;;) {
+		if(feof(fp)) {
+			err = 0;
+			break;
+		}
+
 		line = readline(fp, &buffer, &bufsize);
 
 		if(!line) {
@@ -335,11 +340,6 @@ int read_config_file(splay_tree_t *config_tree, const char *fname) {
 			break;
 		}
 
-		if(feof(fp)) {
-			err = 0;
-			break;
-		}
-
 		lineno++;
 
 		if(!*line || *line == '#')
diff --git a/src/net_socket.c b/src/net_socket.c
index a6fe54bc..c2c1da96 100644
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@ -294,7 +294,8 @@ begin:
 	}
 
 	if(!c->outgoing->aip) {
-		freeaddrinfo(c->outgoing->ai);
+		if(c->outgoing->ai)
+			freeaddrinfo(c->outgoing->ai);
 		c->outgoing->ai = NULL;
 		goto begin;
 	}
diff --git a/src/process.c b/src/process.c
index e9f65d46..aaddcbc1 100644
--- a/src/process.c
+++ b/src/process.c
@@ -148,6 +148,9 @@ bool remove_service(void) {
 
 DWORD WINAPI controlhandler(DWORD request, DWORD type, LPVOID boe, LPVOID bah) {
 	switch(request) {
+		case SERVICE_CONTROL_INTERROGATE:
+			SetServiceStatus(statushandle, &status);
+			return NO_ERROR;
 		case SERVICE_CONTROL_STOP:
 			logger(LOG_NOTICE, _("Got %s request"), "SERVICE_CONTROL_STOP");
 			break;
diff --git a/src/protocol_auth.c b/src/protocol_auth.c
index 0471932a..1fb37fcf 100644
--- a/src/protocol_auth.c
+++ b/src/protocol_auth.c
@@ -207,7 +207,7 @@ bool metakey_h(connection_t *c, char *request) {
 	/* Decrypt the meta key */
 
 	if(!rsa_private_decrypt(&myself->connection->rsa, enckey, len, key)) {
-		logger(LOG_ERR, _("Error during encryption of meta key for %s (%s)"), c->name, c->hostname);
+		logger(LOG_ERR, _("Error during decryption of meta key for %s (%s)"), c->name, c->hostname);
 		return false;
 	}
 
diff --git a/src/protocol_key.c b/src/protocol_key.c
index 52666d99..71f28bf7 100644
--- a/src/protocol_key.c
+++ b/src/protocol_key.c
@@ -128,6 +128,12 @@ bool req_key_h(connection_t *c, char *request) {
 		if(tunnelserver)
 			return false;
 
+		if(!to->status.reachable) {
+			logger(LOG_WARNING, _("Got %s from %s (%s) destination %s which is not reachable"),
+				"REQ_KEY", c->name, c->hostname, to_name);
+			return true;
+		}
+
 		send_req_key(to->nexthop->connection, from, to);
 	}
 
@@ -190,6 +196,12 @@ bool ans_key_h(connection_t *c, char *request) {
 		if(tunnelserver)
 			return false;
 
+		if(!to->status.reachable) {
+			logger(LOG_WARNING, _("Got %s from %s (%s) destination %s which is not reachable"),
+				   "ANS_KEY", c->name, c->hostname, to_name);
+			return true;
+		}
+
 		return send_request(to->nexthop->connection, "%s", request);
 	}
 
diff --git a/src/subnet.c b/src/subnet.c
index 9d84ec2b..46006a16 100644
--- a/src/subnet.c
+++ b/src/subnet.c
@@ -188,11 +188,17 @@ bool str2net(subnet_t *subnet, const char *subnetstr)
 
 	if(sscanf(subnetstr, "%hu.%hu.%hu.%hu/%d",
 			  &x[0], &x[1], &x[2], &x[3], &l) == 5) {
+		if(l < 0 || l > 32)
+			return false;
+
 		subnet->type = SUBNET_IPV4;
 		subnet->net.ipv4.prefixlength = l;
 
-		for(i = 0; i < 4; i++)
+		for(i = 0; i < 4; i++) {
+			if(x[i] > 255)
+				return false;
 			subnet->net.ipv4.address.x[i] = x[i];
+		}
 
 		return true;
 	}
@@ -200,6 +206,9 @@ bool str2net(subnet_t *subnet, const char *subnetstr)
 	if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d",
 			  &x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7],
 			  &l) == 9) {
+		if(l < 0 || l > 128)
+			return false;
+
 		subnet->type = SUBNET_IPV6;
 		subnet->net.ipv6.prefixlength = l;
 
@@ -210,17 +219,26 @@ bool str2net(subnet_t *subnet, const char *subnetstr)
 	}
 
 	if(sscanf(subnetstr, "%hu.%hu.%hu.%hu", &x[0], &x[1], &x[2], &x[3]) == 4) {
+		if(l < 0 || l > 32)
+			return false;
+
 		subnet->type = SUBNET_IPV4;
 		subnet->net.ipv4.prefixlength = 32;
 
-		for(i = 0; i < 4; i++)
+		for(i = 0; i < 4; i++) {
+			if(x[i] > 255)
+				return false;
 			subnet->net.ipv4.address.x[i] = x[i];
+		}
 
 		return true;
 	}
 
 	if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
 			  &x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7]) == 8) {
+		if(l < 0 || l > 128)
+			return false;
+
 		subnet->type = SUBNET_IPV6;
 		subnet->net.ipv6.prefixlength = 128;
 
@@ -348,6 +366,8 @@ subnet_t *lookup_subnet_ipv4(const ipv4_t *address)
 				/* Otherwise, see if there is a bigger enclosing subnet */
 
 				subnet.net.ipv4.prefixlength = p->net.ipv4.prefixlength - 1;
+				if(subnet.net.ipv4.prefixlength < 0 || subnet.net.ipv4.prefixlength > 32)
+					return NULL;
 				maskcpy(&subnet.net.ipv4.address, &p->net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof(ipv4_t));
 			}
 		}
@@ -384,6 +404,8 @@ subnet_t *lookup_subnet_ipv6(const ipv6_t *address)
 				/* Otherwise, see if there is a bigger enclosing subnet */
 
 				subnet.net.ipv6.prefixlength = p->net.ipv6.prefixlength - 1;
+				if(subnet.net.ipv6.prefixlength < 0 || subnet.net.ipv6.prefixlength > 128)
+					return NULL;
 				maskcpy(&subnet.net.ipv6.address, &p->net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof(ipv6_t));
 			}
 		}