I have a Polycom RealPresenece Desktop client installed in PC behind a TMG 2010 Server. and we need to configure access rule to enable this client to start any Audio/video Call to External video conference Devices outside our company.
I disabled the H.323 filter
opened the below Protocols/ports From Desktop client to External:-
but unfortunately I still can't start any A/V Call to any external VC devices. it seems that there a problem with NATing. so please could anyone advise what the needed configuration in TMG to make this call started successfully?
note:- when i opened all oubound traffic to external, the call is started but the media is not working.