Greetings, *** Alan Holt [2015-05-13 18:21]: >*You can see on attached screenshot that both interface are up.* But interface on the server side is no "RUNNING", as client's do. Does up.sh in server's peer subdirectory contain something like echo tap10? Will "ifconfig tap10 up" (or "ip link set up dev tap10") help? >Looks like no traffic can go trough the tunnel. I think that tunnel works (you can listen tcpdump over unencrypted network part), but server's TAP is not running. In FreeBSD I had to turn sysctl options: net.link.tap.user_open=1 net.link.tap.up_on_open=1 The second one up-s the interface when tap device is opened. Maybe something similar is needed under GNU/Linux (currently I do not have any working under the hand). -- Happy hacking, Sergey Matveev