Hello.
We have our VPN server behind our firewall, and two strange things happen, the first is that we can't connect to a terminal server that is behind the vpn server. The terminal server has it's gateway set to be the vpn server, and when a client connects, we can ping the terminal server(@ 23ms too), we can browse files on it, but it will simply not accept a Terminal services connection through the VPN... It works great inside our network.
I was under the impression that most all services would work fine...
Maybe I can get another tip in the right direction.
The second problem is that the vpn connection likes to drop it's clients at seemingly random times, but usually only less than a few mins in to the session.