<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><br><br><div>Is it because the packet MTU is too big? It can't handle size bigger than 1472 bytes?<br>The last line looks strange to me.<br></div>a=candidate:2 2 UDP 1694498814 124.193.138.210 5060 typ srflx raddr 192.168[|sip]<br><br><br><div></div><div id="divNeteaseMailCard"></div><br>At 2014-10-15 22:50:43, "Bogdan-Andrei Iancu" &lt;bogdan@opensips.org&gt; wrote:<br> <blockquote id="isReplyContent" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
  
    
  
  
    <div class="moz-cite-prefix"><tt>The trace definitely s</tt>hows
      linphone not answering to the INVITE handled via mediaproxy
      (INVITE goes to linphone but nothing back).<br>
      <br>
      Regards,<br>
      <pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
      On 15.10.2014 17:32, george wu wrote:<br>
    </div>
    <blockquote cite="mid:19a5f1b5.11c47.14914396a05.Coremail.aihuawu2012@163.com" type="cite">
      <div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial">
        <div>//part 2<br>
          <br>
          &nbsp;<br>
          &nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.6001: SIP,
          length: 1472<br>
          &nbsp;&nbsp;&nbsp; INVITE <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@192.168.1.3:5080">sip:test2@192.168.1.3:5080</a> 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: <a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@103.24.228.158">&lt;sip:test1@103.24.228.158&gt;</a>;tag=OGCx7gRon<br>
          &nbsp;&nbsp;&nbsp; To: <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@103.24.228.158">sip:test2@103.24.228.158</a><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:
<a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@124.193.138.210:5758">&lt;sip:test1@124.193.138.210:5758&gt;</a>;+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>
          22:20:20.414018 IP (tos 0x10, ttl 64, id 55680, 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 <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@124.193.138.210:6001">sip:test2@124.193.138.210:6001</a> 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: <a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@103.24.228.158">&lt;sip:test1@103.24.228.158&gt;</a>;tag=OGCx7gRon<br>
          &nbsp;&nbsp;&nbsp; To: <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@103.24.228.158">sip:test2@103.24.228.158</a><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:
<a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@124.193.138.210:5758">&lt;sip:test1@124.193.138.210:5758&gt;</a>;+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>
          22:20:21.023735 IP (tos 0x10, ttl 64, id 0, offset 0, flags
          [DF], proto UDP (17), length 32)<br>
          &nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.6001: SIP,
          length: 4<br>
          &nbsp;&nbsp;&nbsp; \0x00\0x00\0x00[|sip]<br>
          22:20:21.023768 IP (tos 0x10, ttl 64, id 0, offset 0, flags
          [DF], proto UDP (17), length 32)<br>
          &nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.6001: SIP,
          length: 4<br>
          &nbsp;&nbsp;&nbsp; \0x00\0x00\0x00[|sip]<br>
          22:20:22.641553 IP (tos 0x10, ttl 64, id 55681, 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 <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@192.168.1.3:5080">sip:test2@192.168.1.3:5080</a> 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: <a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@103.24.228.158">&lt;sip:test1@103.24.228.158&gt;</a>;tag=OGCx7gRon<br>
          &nbsp;&nbsp;&nbsp; To: <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@103.24.228.158">sip:test2@103.24.228.158</a><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:
<a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@124.193.138.210:5758">&lt;sip:test1@124.193.138.210:5758&gt;</a>;+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>
          22:20:22.641606 IP (tos 0x10, ttl 64, id 55682, 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 <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@124.193.138.210:6001">sip:test2@124.193.138.210:6001</a> 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: <a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@103.24.228.158">&lt;sip:test1@103.24.228.158&gt;</a>;tag=OGCx7gRon<br>
          &nbsp;&nbsp;&nbsp; To: <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@103.24.228.158">sip:test2@103.24.228.158</a><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:
<a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@124.193.138.210:5758">&lt;sip:test1@124.193.138.210:5758&gt;</a>;+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>
          22:20:24.969168 IP (tos 0x10, ttl 64, id 0, offset 0, flags
          [DF], proto UDP (17), length 378)<br>
          &nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.5758: SIP,
          length: 350<br>
          &nbsp;&nbsp;&nbsp; SIP/2.0 408 Request Timeout<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: <a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@103.24.228.158">&lt;sip:test1@103.24.228.158&gt;</a>;tag=OGCx7gRon<br>
          &nbsp;&nbsp;&nbsp; To:
          <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@103.24.228.158;tag=d8bd1b57441363f641ce73441337eed0-1628">sip:test2@103.24.228.158;tag=d8bd1b57441363f641ce73441337eed0-1628</a><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>
          22:20:25.033860 IP (tos 0x10, ttl 64, id 0, offset 0, flags
          [DF], proto UDP (17), length 32)<br>
          &nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.5758: SIP,
          length: 4<br>
          &nbsp;&nbsp;&nbsp; \0x00\0x00\0x00[|sip]<br>
          22:20:25.033896 IP (tos 0x10, ttl 64, id 0, offset 0, flags
          [DF], proto UDP (17), length 32)<br>
          &nbsp;&nbsp;&nbsp; 103.24.228.158.5060 &gt; 124.193.138.210.5758: SIP,
          length: 4<br>
          &nbsp;&nbsp;&nbsp; \0x00\0x00\0x00[|sip]<br>
          22:20:25.045036 IP (tos 0x0, ttl 48, id 24523, offset 0, flags
          [DF], proto UDP (17), length 416)<br>
          &nbsp;&nbsp;&nbsp; 124.193.138.210.5758 &gt; 103.24.228.158.5060: SIP,
          length: 388<br>
          &nbsp;&nbsp;&nbsp; ACK <a class="moz-txt-link-abbreviated" href="mailto:sip:test2@103.24.228.158">sip:test2@103.24.228.158</a> 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; Call-ID: xHqVFVS-lk<br>
          &nbsp;&nbsp;&nbsp; From: <a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@103.24.228.158">&lt;sip:test1@103.24.228.158&gt;</a>;tag=OGCx7gRon<br>
          &nbsp;&nbsp;&nbsp; To:
<a class="moz-txt-link-rfc2396E" href="mailto:sip:test2@103.24.228.158">&lt;sip:test2@103.24.228.158&gt;</a>;tag=d8bd1b57441363f641ce73441337eed0-1628<br>
          &nbsp;&nbsp;&nbsp; Contact:
<a class="moz-txt-link-rfc2396E" href="mailto:sip:test1@124.193.138.210:5758">&lt;sip:test1@124.193.138.210:5758&gt;</a>;+sip.instance="&lt;urn:uuid:866598bd-4f5e-47f9-b7fa-8be6c6883a57&gt;"<br>
          &nbsp;&nbsp;&nbsp; Max-Forwards: 70<br>
          &nbsp;&nbsp;&nbsp; CSeq: 20 ACK<br>
          &nbsp;&nbsp;&nbsp; <br>
          &nbsp;&nbsp;&nbsp; <br>
          22:20:26.129568 IP (tos 0x0, ttl 48, id 24524, offset 0, flags
          [DF], proto UDP (17), length 32)<br>
          &nbsp;&nbsp;&nbsp; 124.193.138.210.5758 &gt; 103.24.228.158.5060: SIP,
          length: 4<br>
          &nbsp;&nbsp;&nbsp; <br>
          &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>
  

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