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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello the list,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I have a problem on the proxy with the audio between two calls bridged by a UAC.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When I made a normal call, no problems.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My UAC is nated. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">UAC > Router > KAMAILIO<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Frames arrives with private IP in the SDP.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">U 2018/01/18 21:50:16.798581 217.112.180.235:1024 -> 217.112.180.10:5060<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">SIP/2.0 200 OK.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Via: SIP/2.0/UDP 217.112.180.10;branch=z9hG4bK2d06.2f2a1856bde881173a3fc413c4136b83.0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Via: SIP/2.0/UDP 84.14.241.179:5060;rport=5060;branch=z9hG4bK0dBe3143bcf7f60a70b.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Record-Route: <sip:217.112.180.10;lr=on;ftag=gK0d4dfe6f;did=227.c0d2;nat=yes>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From: <sip:32XXXXXX87@ >;tag=gK0d4dfe6f.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Call-ID: 940401290_111374574@84.14.241.179.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">CSeq: 29328 INVITE.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Contact: <sip:32XXXXXX61@192.168.2.2:5060;transport=udp>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,INFO,NOTIFY.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Supported: timer,100rel.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Server: IP Office 10.1.0.0.0 build 237.<o:p></o:p></span></p>
<p class="MsoNormal">Min-SE: 1800.<o:p></o:p></p>
<p class="MsoNormal">Require: timer.<o:p></o:p></p>
<p class="MsoNormal">Session-Expires: 1800;refresher=uas.<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">To: <sip:32XXXXXX61@217.112.180.235>;tag=998e429e819ba686.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Content-Type: application/sdp.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Content-Length: 202.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">v=0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">o=UserA 3721571424 1025404311 IN IP4 192.168.2.2.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">s=Session SDP.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">c=IN IP4 192.168.2.2.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">t=0 0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">m=audio 49154 RTP/AVP 9 101.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">a=rtpmap:9 G722/8000.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">a=rtpmap:101 telephone-event/8000.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">a=fmtp:101 0-15.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I don’t understand why but the proxy (in case of an incoming call) succeed to determine the public IP.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US">Jan 18 21:40:08 proxy1 rtpproxy[1314]: INFO:rxmit_packets:1fb3f1c6c8dfe738221842406be48450: caller's address filled in: 217.112.180.235:49154 (RTP)<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US">Jan 18 21:40:08 proxy1 rtpproxy[1314]: INFO:rxmit_packets:1fb3f1c6c8dfe738221842406be48450: guessing RTCP port for caller to be 49155<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jan 18 21:40:16 proxy1 rtpproxy[1314]: INFO:rxmit_packets:1fb3f1c6c8dfe738221842406be48450: caller's address latched in: 217.112.180.235:49155 (RTCP)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Don’t know why because the only information in SDP is 192.168.2.2<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The Kamailio didn’t send the information of the proxy to the UAC , but to the other end as this is an incoming call.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So I have audio in this case.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When I setup a bridge on the UAC to a second number, we have an issue. ( Kamailio 4.4.6 )<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This is the same frames<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">U 2018/01/18 21:51:26.607270 217.112.180.235:1024 -> 217.112.180.10:5060<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">SIP/2.0 200 OK.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Via: SIP/2.0/UDP 217.112.180.10;branch=z9hG4bK4181.bb7aab84b6fb0aea5836b4d8874406ec.0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Via: SIP/2.0/UDP 84.14.241.179:5060;rport=5060;branch=z9hG4bK0bB16ee5a3d300fee16.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Record-Route: <sip:217.112.180.10;lr=on;ftag=gK0b5d7652;did=cc6.5452;nat=yes>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From: <sip:32XXXXXX87@ >;tag=gK0b5d7652.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Call-ID: 940248136_13287504@84.14.241.179.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">CSeq: 21946 INVITE.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Contact: <sip:32XXXXXX61@192.168.2.2:5060;transport=udp>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,INFO,NOTIFY.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Supported: timer,100rel.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Server: IP Office 10.1.0.0.0 build 237.<o:p></o:p></span></p>
<p class="MsoNormal">Min-SE: 1800.<o:p></o:p></p>
<p class="MsoNormal">Require: timer.<o:p></o:p></p>
<p class="MsoNormal">Session-Expires: 1800;refresher=uas.<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">To: <sip:32XXXXXX61@217.112.180.235>;tag=559c99f5edcab5d4.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Content-Type: application/sdp.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Content-Length: 202.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">v=0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">o=UserA 1781830446 4071482272 IN IP4 192.168.2.2.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">s=Session SDP.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">c=IN IP4 192.168.2.2.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">t=0 0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">m=audio 49156 RTP/AVP 8 101.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">a=rtpmap:8 PCMA/8000.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">a=rtpmap:101 telephone-event/8000.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">a=fmtp:101 0-16.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But in this case no audio<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">RTCP detected but no the RTP.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">He took the private ip address “192.168.2.2” and this is the reason of the “no audio”.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jan 18 21:51:26 proxy1 rtpproxy[1314]: INFO:rtpp_command_ul_handle:940248136_13287504@84.14.241.179: lookup on ports 11264/10446, session timer restarted<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jan 18 21:51:26 proxy1 rtpproxy[1314]: INFO:rtpp_command_ul_handle:940248136_13287504@84.14.241.179: pre-filling callee's address with 192.168.2.2:49156<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jan 18 21:51:26 proxy1 rtpproxy[1314]: INFO:rxmit_packets:e1e387824e0753522b7bc55e02090784: callee's address latched in: 79.137.49.139:39176 (RTP)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jan 18 21:51:32 proxy1 rtpproxy[1314]: INFO:rxmit_packets:e1e387824e0753522b7bc55e02090784: caller's address filled in: 217.112.180.235:49155 (RTCP)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jan 18 21:51:32 proxy1 rtpproxy[1314]: INFO:rxmit_packets:940248136_13287504@84.14.241.179: callee's address filled in: 217.112.180.235:49157 (RTCP)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I would like to understand why with the first call, no issues to determine the RTP IP and not in the second case,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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