I have RDP access into my TMG server from the internet using the remote desktop client on a custom port.
It works well accessing the TMG server, but I am trying to setup access to another internal Windows 2008 server on a different port.
I've setup a non-website publishing rule in TMG, with destination server IP, the custom port number, etc.
All seems to be 100% correct, but access to the secondary server (via TMG) does not seem to work.
Access briefly worked after configuration and then went off. I am able to access the secondary server from the LAN, but not via TMG, tried almost all configurations, even with default 3389 port, but no joy!!