your Asterisk server at all. Try doing a packet trace on the network<br> segment where the calling SIP agent is and see where it's trying to<br> send the ACK to. My guess would be your firewall is incorrectly<br> handling the SIP messages. Generally it's very bad news to use an ALG<br> or firewall to mangle SIP packets as they almost always get it wrong.<br> <br> In your case there is a Record-Route header in the response so the ACK<br> request should be being sent to that address. Perhaps your firewall is<br> not correctly mangling that to allow the request to find its way back<br> to your Asterisk server.<br> <div class="Ih2E3d"><br> Record-Route: <sip:<a href="http://216.82.224.202" target="_blank">216.82.224.202</a>;lr;ftag=as3ed791f3><br> <br> </div>Regards,<br> <br> Greyman.<br> <div><div></div><div class="Wj3C7c"><br> _______________________________________________<br> -- Bandwidth and Colocation Provided by <a href="http://www.api-digital.com" target="_blank">http://www.api-digital.com</a> --<br> <br> asterisk-users mailing list<br> To UNSUBSCRIBE or update options visit:<br> <a href="http://lists.digium.com/mailman/listinfo/asterisk-users" target="_blank">http://lists.digium.com/mailman/listinfo/asterisk-users</a><br> </div></div></blockquote></div><br><br clear="all"><br><br> ------=_Part_63037_9504058.1226139156870--