I have a working SIP trunk to A&A in the UK. I would steer clear of the SIP proxy since most reports say that it does more harm than good.What are you trying to connect? Any option to use AIX2 which is much more NAT friendly?Bart...
Screenshot of outbound nat and port forward please
Did you configure STUN? Here's a few servers to choose from: https://gist.github.com/mondain/b0ec1cf5f60ae726202eBart...
Screenshots
And LAN Firewall everything is accepted?
Then you'd need a packet capture and upload it here to see whats going on