Hi All,
Struggling to get our PBX (3cx) to work through TMG.
Everything works except for our incoming calls via DID. Upon further investigation the problem lies with TMG changing the destination /source ports on the traffic leaving our network to something random. I have tried setting up an Enat rule which makes no difference.
Note if the call is initiated from our PBX internally to an external PBX the call works fine - Audio works both ways. However if the call is initiated from our DID provider to to our internal PBX we can only hear the external party and they cant hear us.