List Asterisk 13.14.1 in use with pjsip stack. On the remote side is a SBC which performs some nat detection. I suppose this means the SBC listens from where it is getting RTP data and then replies to that ip. As long as the asterisk is initiating ..
List I have a still two connected DUNDI peers, but they seem to flap from time to time. A couple of years ago I was able to look up quite some, mostly free call numbers via DUNDI all over the world and I als saw incomming lookups. But not anymore..