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SIP Protocol Support-Ports other than 5060

Murphdog
SIP Protocol Support-Ports other than 5060? Is it possible?

I have ATA's that the provider(VOIPO) has changed the port number to try and combat the issue below.

I have an Asterix PBX, and two VOIPO ATA's behind a free UTM (9.210-20) at home. The Asterix PBX runs like a champ with no issues. The Grandstream ATA works 95%. If I get audio quality issues a reboot of the firewall fixes the issue. The Linksys PAP often gets inbound audio issues and sometimes outbound.

I have no filtering and a "any" out rule for the ATA's. I created a DNAT rule for the VOPO servers to the correct inbound ports. 

I want to try the SIP Protocol Support because I can see the firewall bounce the RTP packets on inbound calls.

Thanks in advance.


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