<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial">Hi, Bogdan:<br><br>The following is the tcpdump with mediaproxy on.<br>I can't see any problem. That means it is linphone problem which can't understand ice?<br>Actually as I said before, if I use tcp/tls, ice actually works on linphone. &nbsp; <br>What should I do more to test it?<br><br><div>George Wu<br><br>/// part 1<br>&nbsp;&nbsp;&nbsp; 124.193.138.210.5758 &gt; 103.24.228.158.5060: SIP, length: 1291<br>&nbsp;&nbsp;&nbsp; INVITE sip:test2@103.24.228.158 SIP/2.0<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 192.168.1.3:5070;branch=z9hG4bK.FohJ-Pjji;rport<br>&nbsp;&nbsp;&nbsp; From: &lt;sip:test1@103.24.228.158&gt;;tag=OGCx7gRon<br>&nbsp;&nbsp;&nbsp; To: sip:test2@103.24.228.158<br>&nbsp;&nbsp;&nbsp; CSeq: 20 INVITE<br>&nbsp;&nbsp;&nbsp; Call-ID: xHqVFVS-lk<br>&nbsp;&nbsp;&nbsp; Max-Forwards: 70<br>&nbsp;&nbsp;&nbsp; Supported: outbound<br>&nbsp;&nbsp;&nbsp; Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE<br>&nbsp;&nbsp;&nbsp; Content-Type: application/sdp<br>&nbsp;&nbsp;&nbsp; Content-Length: 730<br>&nbsp;&nbsp;&nbsp; Contact: &lt;sip:test1@124.193.138.210:5758&gt;;+sip.instance="&lt;urn:uuid:866598bd-4f5e-47f9-b7fa-8be6c6883a57&gt;"<br>&nbsp;&nbsp;&nbsp; User-Agent: Linphonec/3.7.0 (belle-sip/1.3.2)<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; v=0<br>&nbsp;&nbsp;&nbsp; o=test1 1433 1939 IN IP4 192.168.1.3<br>&nbsp;&nbsp;&nbsp; s=Talk<br>&nbsp;&nbsp;&nbsp; c=IN IP4 192.168.1.3<br>&nbsp;&nbsp;&nbsp; t=0 0<br>&nbsp;&nbsp;&nbsp; a=ice-pwd:84505b9d160c756b6b138ac5<br>&nbsp;&nbsp;&nbsp; a=ice-ufrag:5e5508d3<br>&nbsp;&nbsp;&nbsp; a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics<br>&nbsp;&nbsp;&nbsp; m=audio 5909 RTP/AVP 111 110 0 8 101<br>&nbsp;&nbsp;&nbsp; c=IN IP4 124.193.138.210<br>&nbsp;&nbsp;&nbsp; a=rtpmap:111 speex/16000<br>&nbsp;&nbsp;&nbsp; a=fmtp:111 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:110 speex/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:110 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:101 telephone-event/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:101 0-15<br>&nbsp;&nbsp;&nbsp; a=rtcp:5060<br>&nbsp;&nbsp;&nbsp; a=candidate:1 1 UDP 2130706431 192.168.1.3 7078 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:1 2 UDP 2130706430 192.168.1.3 7079 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:2 2 UDP 1694498814 124.193.138.210 5060 typ srflx raddr 192.168.1.3 rport 7079<br>&nbsp;&nbsp;&nbsp; a=candidate:2 1 UDP 1694498815 124.193.138.210 5909 typ srflx raddr 192.168.1.3 rport 7078<br>&nbsp;&nbsp;&nbsp; <br>22:20:18.692288 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 333)<br>&nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.5758: SIP, length: 305<br>&nbsp;&nbsp;&nbsp; SIP/2.0 100 Giving a try<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 192.168.1.3:5070;received=124.193.138.210;branch=z9hG4bK.FohJ-Pjji;rport=5758<br>&nbsp;&nbsp;&nbsp; From: &lt;sip:test1@103.24.228.158&gt;;tag=OGCx7gRon<br>&nbsp;&nbsp;&nbsp; To: sip:test2@103.24.228.158<br>&nbsp;&nbsp;&nbsp; CSeq: 20 INVITE<br>&nbsp;&nbsp;&nbsp; Call-ID: xHqVFVS-lk<br>&nbsp;&nbsp;&nbsp; Server: OpenSIPS (1.11.2-tls (x86_64/linux))<br>&nbsp;&nbsp;&nbsp; Content-Length: 0<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; <br>22:20:18.692464 IP (tos 0x10, ttl 64, id 55675, offset 0, flags [+], proto UDP (17), length 1500)<br>&nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.6001: SIP, length: 1472<br>&nbsp;&nbsp;&nbsp; INVITE sip:test2@192.168.1.3:5080 SIP/2.0<br>&nbsp;&nbsp;&nbsp; Record-Route: &lt;sip:103.24.228.158;lr;nat=yes&gt;<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 103.24.228.158:5060;branch=z9hG4bK57b9.3415f0e2.0<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 192.168.1.3:5070;received=124.193.138.210;branch=z9hG4bK.FohJ-Pjji;rport=5758<br>&nbsp;&nbsp;&nbsp; From: &lt;sip:test1@103.24.228.158&gt;;tag=OGCx7gRon<br>&nbsp;&nbsp;&nbsp; To: sip:test2@103.24.228.158<br>&nbsp;&nbsp;&nbsp; CSeq: 20 INVITE<br>&nbsp;&nbsp;&nbsp; Call-ID: xHqVFVS-lk<br>&nbsp;&nbsp;&nbsp; Max-Forwards: 69<br>&nbsp;&nbsp;&nbsp; Supported: outbound<br>&nbsp;&nbsp;&nbsp; Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE<br>&nbsp;&nbsp;&nbsp; Content-Type: application/sdp<br>&nbsp;&nbsp;&nbsp; Content-Length: 872<br>&nbsp;&nbsp;&nbsp; Contact: &lt;sip:test1@124.193.138.210:5758&gt;;+sip.instance="&lt;urn:uuid:866598bd-4f5e-47f9-b7fa-8be6c6883a57&gt;"<br>&nbsp;&nbsp;&nbsp; User-Agent: Linphonec/3.7.0 (belle-sip/1.3.2)<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; v=0<br>&nbsp;&nbsp;&nbsp; o=test1 1433 1939 IN IP4 192.168.1.3<br>&nbsp;&nbsp;&nbsp; s=Talk<br>&nbsp;&nbsp;&nbsp; c=IN IP4 103.24.228.158<br>&nbsp;&nbsp;&nbsp; t=0 0<br>&nbsp;&nbsp;&nbsp; a=ice-pwd:84505b9d160c756b6b138ac5<br>&nbsp;&nbsp;&nbsp; a=ice-ufrag:5e5508d3<br>&nbsp;&nbsp;&nbsp; a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics<br>&nbsp;&nbsp;&nbsp; m=audio 50002 RTP/AVP 111 110 0 8 101<br>&nbsp;&nbsp;&nbsp; c=IN IP4 103.24.228.158<br>&nbsp;&nbsp;&nbsp; a=rtpmap:111 speex/16000<br>&nbsp;&nbsp;&nbsp; a=fmtp:111 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:110 speex/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:110 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:101 telephone-event/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:101 0-15<br>&nbsp;&nbsp;&nbsp; a=rtcp:50003<br>&nbsp;&nbsp;&nbsp; a=candidate:R9ee41867 1 UDP 16777215 103.24.228.158 50002 typ relay<br>&nbsp;&nbsp;&nbsp; a=candidate:R9ee41867 2 UDP 16777214 103.24.228.158 50003 typ relay<br>&nbsp;&nbsp;&nbsp; a=candidate:1 1 UDP 2130706431 192.168.1.3 7078 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:1 2 UDP 2130706430 192.168.1.3 7079 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:2 2 UDP 1694498814 124.193.138.210 5060 typ srflx raddr 192.168[|sip]<br>22:20:18.692499 IP (tos 0x10, ttl 64, id 55676, offset 0, flags [+], proto UDP (17), length 1500)<br>&nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.6001: SIP, length: 1472<br>&nbsp;&nbsp;&nbsp; INVITE sip:test2@124.193.138.210:6001 SIP/2.0<br>&nbsp;&nbsp;&nbsp; Record-Route: &lt;sip:103.24.228.158;lr;nat=yes&gt;<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 103.24.228.158:5060;branch=z9hG4bK57b9.3415f0e2.1<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 192.168.1.3:5070;received=124.193.138.210;branch=z9hG4bK.FohJ-Pjji;rport=5758<br>&nbsp;&nbsp;&nbsp; From: &lt;sip:test1@103.24.228.158&gt;;tag=OGCx7gRon<br>&nbsp;&nbsp;&nbsp; To: sip:test2@103.24.228.158<br>&nbsp;&nbsp;&nbsp; CSeq: 20 INVITE<br>&nbsp;&nbsp;&nbsp; Call-ID: xHqVFVS-lk<br>&nbsp;&nbsp;&nbsp; Max-Forwards: 69<br>&nbsp;&nbsp;&nbsp; Supported: outbound<br>&nbsp;&nbsp;&nbsp; Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE<br>&nbsp;&nbsp;&nbsp; Content-Type: application/sdp<br>&nbsp;&nbsp;&nbsp; Content-Length: 872<br>&nbsp;&nbsp;&nbsp; Contact: &lt;sip:test1@124.193.138.210:5758&gt;;+sip.instance="&lt;urn:uuid:866598bd-4f5e-47f9-b7fa-8be6c6883a57&gt;"<br>&nbsp;&nbsp;&nbsp; User-Agent: Linphonec/3.7.0 (belle-sip/1.3.2)<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; v=0<br>&nbsp;&nbsp;&nbsp; o=test1 1433 1939 IN IP4 192.168.1.3<br>&nbsp;&nbsp;&nbsp; s=Talk<br>&nbsp;&nbsp;&nbsp; c=IN IP4 103.24.228.158<br>&nbsp;&nbsp;&nbsp; t=0 0<br>&nbsp;&nbsp;&nbsp; a=ice-pwd:84505b9d160c756b6b138ac5<br>&nbsp;&nbsp;&nbsp; a=ice-ufrag:5e5508d3<br>&nbsp;&nbsp;&nbsp; a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics<br>&nbsp;&nbsp;&nbsp; m=audio 50002 RTP/AVP 111 110 0 8 101<br>&nbsp;&nbsp;&nbsp; c=IN IP4 103.24.228.158<br>&nbsp;&nbsp;&nbsp; a=rtpmap:111 speex/16000<br>&nbsp;&nbsp;&nbsp; a=fmtp:111 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:110 speex/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:110 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:101 telephone-event/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:101 0-15<br>&nbsp;&nbsp;&nbsp; a=rtcp:50003<br>&nbsp;&nbsp;&nbsp; a=candidate:R9ee41867 1 UDP 16777215 103.24.228.158 50002 typ relay<br>&nbsp;&nbsp;&nbsp; a=candidate:R9ee41867 2 UDP 16777214 103.24.228.158 50003 typ relay<br>&nbsp;&nbsp;&nbsp; a=candidate:1 1 UDP 2130706431 192.168.1.3 7078 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:1 2 UDP 2130706430 192.168.1.3 7079 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:2 2 UDP 1694498814 124.193.138.210 5060 typ srflx raddr 192[|sip]<br>22:20:19.301123 IP (tos 0x10, ttl 64, id 55677, offset 0, flags [+], proto UDP (17), length 1500)<br>&nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.6001: SIP, length: 1472<br>&nbsp;&nbsp;&nbsp; INVITE sip:test2@192.168.1.3:5080 SIP/2.0<br>&nbsp;&nbsp;&nbsp; Record-Route: &lt;sip:103.24.228.158;lr;nat=yes&gt;<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 103.24.228.158:5060;branch=z9hG4bK57b9.3415f0e2.0<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 192.168.1.3:5070;received=124.193.138.210;branch=z9hG4bK.FohJ-Pjji;rport=5758<br>&nbsp;&nbsp;&nbsp; From: &lt;sip:test1@103.24.228.158&gt;;tag=OGCx7gRon<br>&nbsp;&nbsp;&nbsp; To: sip:test2@103.24.228.158<br>&nbsp;&nbsp;&nbsp; CSeq: 20 INVITE<br>&nbsp;&nbsp;&nbsp; Call-ID: xHqVFVS-lk<br>&nbsp;&nbsp;&nbsp; Max-Forwards: 69<br>&nbsp;&nbsp;&nbsp; Supported: outbound<br>&nbsp;&nbsp;&nbsp; Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE<br>&nbsp;&nbsp;&nbsp; Content-Type: application/sdp<br>&nbsp;&nbsp;&nbsp; Content-Length: 872<br>&nbsp;&nbsp;&nbsp; Contact: &lt;sip:test1@124.193.138.210:5758&gt;;+sip.instance="&lt;urn:uuid:866598bd-4f5e-47f9-b7fa-8be6c6883a57&gt;"<br>&nbsp;&nbsp;&nbsp; User-Agent: Linphonec/3.7.0 (belle-sip/1.3.2)<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; v=0<br>&nbsp;&nbsp;&nbsp; o=test1 1433 1939 IN IP4 192.168.1.3<br>&nbsp;&nbsp;&nbsp; s=Talk<br>&nbsp;&nbsp;&nbsp; c=IN IP4 103.24.228.158<br>&nbsp;&nbsp;&nbsp; t=0 0<br>&nbsp;&nbsp;&nbsp; a=ice-pwd:84505b9d160c756b6b138ac5<br>&nbsp;&nbsp;&nbsp; a=ice-ufrag:5e5508d3<br>&nbsp;&nbsp;&nbsp; a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics<br>&nbsp;&nbsp;&nbsp; m=audio 50002 RTP/AVP 111 110 0 8 101<br>&nbsp;&nbsp;&nbsp; c=IN IP4 103.24.228.158<br>&nbsp;&nbsp;&nbsp; a=rtpmap:111 speex/16000<br>&nbsp;&nbsp;&nbsp; a=fmtp:111 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:110 speex/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:110 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:101 telephone-event/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:101 0-15<br>&nbsp;&nbsp;&nbsp; a=rtcp:50003<br>&nbsp;&nbsp;&nbsp; a=candidate:R9ee41867 1 UDP 16777215 103.24.228.158 50002 typ relay<br>&nbsp;&nbsp;&nbsp; a=candidate:R9ee41867 2 UDP 16777214 103.24.228.158 50003 typ relay<br>&nbsp;&nbsp;&nbsp; a=candidate:1 1 UDP 2130706431 192.168.1.3 7078 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:1 2 UDP 2130706430 192.168.1.3 7079 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:2 2 UDP 1694498814 124.193.138.210 5060 typ srflx raddr 192.168[|sip]<br>22:20:19.301208 IP (tos 0x10, ttl 64, id 55678, offset 0, flags [+], proto UDP (17), length 1500)<br>&nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.6001: SIP, length: 1472<br>&nbsp;&nbsp;&nbsp; INVITE sip:test2@124.193.138.210:6001 SIP/2.0<br>&nbsp;&nbsp;&nbsp; Record-Route: &lt;sip:103.24.228.158;lr;nat=yes&gt;<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 103.24.228.158:5060;branch=z9hG4bK57b9.3415f0e2.1<br>&nbsp;&nbsp;&nbsp; Via: SIP/2.0/UDP 192.168.1.3:5070;received=124.193.138.210;branch=z9hG4bK.FohJ-Pjji;rport=5758<br>&nbsp;&nbsp;&nbsp; From: &lt;sip:test1@103.24.228.158&gt;;tag=OGCx7gRon<br>&nbsp;&nbsp;&nbsp; To: sip:test2@103.24.228.158<br>&nbsp;&nbsp;&nbsp; CSeq: 20 INVITE<br>&nbsp;&nbsp;&nbsp; Call-ID: xHqVFVS-lk<br>&nbsp;&nbsp;&nbsp; Max-Forwards: 69<br>&nbsp;&nbsp;&nbsp; Supported: outbound<br>&nbsp;&nbsp;&nbsp; Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE<br>&nbsp;&nbsp;&nbsp; Content-Type: application/sdp<br>&nbsp;&nbsp;&nbsp; Content-Length: 872<br>&nbsp;&nbsp;&nbsp; Contact: &lt;sip:test1@124.193.138.210:5758&gt;;+sip.instance="&lt;urn:uuid:866598bd-4f5e-47f9-b7fa-8be6c6883a57&gt;"<br>&nbsp;&nbsp;&nbsp; User-Agent: Linphonec/3.7.0 (belle-sip/1.3.2)<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; v=0<br>&nbsp;&nbsp;&nbsp; o=test1 1433 1939 IN IP4 192.168.1.3<br>&nbsp;&nbsp;&nbsp; s=Talk<br>&nbsp;&nbsp;&nbsp; c=IN IP4 103.24.228.158<br>&nbsp;&nbsp;&nbsp; t=0 0<br>&nbsp;&nbsp;&nbsp; a=ice-pwd:84505b9d160c756b6b138ac5<br>&nbsp;&nbsp;&nbsp; a=ice-ufrag:5e5508d3<br>&nbsp;&nbsp;&nbsp; a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics<br>&nbsp;&nbsp;&nbsp; m=audio 50002 RTP/AVP 111 110 0 8 101<br>&nbsp;&nbsp;&nbsp; c=IN IP4 103.24.228.158<br>&nbsp;&nbsp;&nbsp; a=rtpmap:111 speex/16000<br>&nbsp;&nbsp;&nbsp; a=fmtp:111 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:110 speex/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:110 vbr=on<br>&nbsp;&nbsp;&nbsp; a=rtpmap:101 telephone-event/8000<br>&nbsp;&nbsp;&nbsp; a=fmtp:101 0-15<br>&nbsp;&nbsp;&nbsp; a=rtcp:50003<br>&nbsp;&nbsp;&nbsp; a=candidate:R9ee41867 1 UDP 16777215 103.24.228.158 50002 typ relay<br>&nbsp;&nbsp;&nbsp; a=candidate:R9ee41867 2 UDP 16777214 103.24.228.158 50003 typ relay<br>&nbsp;&nbsp;&nbsp; a=candidate:1 1 UDP 2130706431 192.168.1.3 7078 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:1 2 UDP 2130706430 192.168.1.3 7079 typ host<br>&nbsp;&nbsp;&nbsp; a=candidate:2 2 UDP 1694498814 124.193.138.210 5060 typ srflx raddr 192[|sip]<br>22:20:20.413939 IP (tos 0x10, ttl 64, id 55679, offset 0, flags [+], proto UDP (17), length 1500)<br>&nbsp;<br>&nbsp;<br></div></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span>