I’d like to move my Asterisk server behind my firewall. In this configuration, I can get Asterisk to call out and to register to a SIP provider. I can not however get SIP phones from outside to register to the Asterisk server.
I assigned the box a real IP, and using proxy-arp I can get SSH and Apache to respond to outside requests to this real IP. I also tried using sip-conntrack-nat on the firewall. All attempts to get outside SIP phones to register however have failed.
I want to move my Asterisk server to a dedicated box, but I want it to be behind the firewall so that I can continue to use my firewall’s QoS. Am I wasting my time getting this to work?