FreePBX : Sonicwall TZ 600 Setup :- Why VOIP on VPN doesn't work if I Enable SIP transformations but the remote Softphones on internet connected through dyndns works fine. VICEVERSA#
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I would like to add here that not all remote softphones connect to FreePBX only few register for rest they don't even register.
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So if I enable SIP transformations... The VOICE on Softphones connecting through dyndns IP works.. but the softphone clients on the VPN for users working from home doesn't register.. And if I disable the SIP transformation, the Softphones connecting through dyndns works but the Softphone connected through VPN doesnt work.
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Also the softphone on VPN are using VPN because I suppose the local ISPs in India must be completely blocking their VOIP features.
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However here at my Main office users are able to connect to softphones using their wifi connection but not the mobile data.
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As far as I know I have allowed all the necessary ports through the firewall because if I enable SIP transformations Softphones connecting through DYNDNS work fine except VOIP ON VPN.
Any suggestions please.?