SSTP VPN one way audio using SIP client RRS feed

  • Question

  • We are trying to use a soft phone (X-Lite client) via UAG (SSTP).  TMG has been configured to use Route as opposed to NAT, VPN clients are allocated an IP address on our internal network.  I can ping all internal devices from the VPN client and all the internal devices can ping the VPN client.   The problem we are having is one way audio when we make a call.

    If I ring an external number like a mobile, I hear the SIP client talking but the SIP client can not hear me. If I ring an internal number I get audio from the internal phone but they can not hear the SIP phone.  The TMG logs do not show any ports being blocked. 

    Has anyone managed to achieve anything similar using UAG or have any ideas as to why we only have one way audio?

    Wednesday, March 14, 2012 5:05 PM