Watchguard XTM blocks OpenVPN traffic
In short: computers behind a Watchguard Fireware XTM can open a connection to OpenVPN server (pfSense 2.0.2) but no traffic passes the tunnel - that is, can not reach servers via the tunnel.
Connection is shown established both in client computers openvpn-gui and on pfSense.
From all other locations it works fine, we have tried with laptops ouside office = everything works fine, same laptop behind Watchguard: tunnel ok, but cant' reach servers via the tunnel.
We're trying to connect with remote desktop to a Win2008R2 server, on Watchguard I have a rule that allows rdp/3389 ALL to ALL.
I don't really see how WG can block, the tunnel should connect client to remote LAN directly? But obviously it does block somehow, since everything works outside office (tested from several locations).
Logs shows nothing, checked both pfSense and Watchguard, nothing shows up.
(I know this isn't strictly a Linux question, but this is a good forum & Linux people tend to know stuff like this!)