--- ssh.conf.original	2013-10-24 09:19:49.729937473 +0200
+++ ssh.conf	2013-10-24 09:20:49.970232824 +0200
@@ -4,7 +4,7 @@
 
 description	"OpenSSH server"
 
-start on filesystem or runlevel [2345]
+start on runlevel [2345] and net-device-up IFACE!=lo
 stop on runlevel [!2345]
 
 respawn