Firewall Fail

[jay5261]

In V18 I had no problem with the firewall, everything passed. But when I upgraded to V20 the firewall will not pass, it says SIP Port: Mapping does not match 5060, mapping is xxxx. how can I fix this issue.

 

[OlegR_3CX]

It seems that your firewall is remapping your port 5060, and to outside world is seeing it as 1172.
You can follow this guide if you wish to see how the firewall checker works in detail.