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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a scenario, where I need to register to freeswitch through 2 or more stateless forwarding kamailio proxies.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><User> => <Proxy1> => <Proxy2> => <FreeSWITCH><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Registration packet which comes to freeswitch have 3 VIA Headers (please see below):<o:p></o:p></p>
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<p class="MsoNormal">REGISTER sip:146.148.54.153 SIP/2.0<o:p></o:p></p>
<p class="MsoNormal">Via: SIP/2.0/TCP 159.203.230.115:5060;branch=z9hG4bKea26.3936c0f1c658d2da02a7c46a86186077.0;i=1;rport<o:p></o:p></p>
<p class="MsoNormal">Via: SIP/2.0/TCP 188.166.22.58:5060;received=188.166.22.58;branch=z9hG4bKea26.98aaf5f1397dccdf6f103ae4150d3ce0.0;i=14;rport=36525<o:p></o:p></p>
<p class="MsoNormal">Via: SIP/2.0/TCP 216.72.41.53:63675;branch=z9hG4bK-524287-1---e991c17828928028<o:p></o:p></p>
<p class="MsoNormal">Max-Forwards: 68<o:p></o:p></p>
<p class="MsoNormal">Contact: <sip:219@216.72.41.53:63675;rinstance=e6186ad594e06aa9;transport=tcp><o:p></o:p></p>
<p class="MsoNormal">To: "219"<sip:219@146.148.54.153><o:p></o:p></p>
<p class="MsoNormal">From: "219"<sip:219@146.148.54.153>;tag=8c8fc855<o:p></o:p></p>
<p class="MsoNormal">Call-ID: NTE1OWIwNjYyODg0YTNiNDVkZDZkNjQxMjlhM2IxYzE<o:p></o:p></p>
<p class="MsoNormal">CSeq: 1 REGISTER<o:p></o:p></p>
<p class="MsoNormal">Allow: INVITE, ACK, CANCEL, BYE, REFER, INFO, NOTIFY, OPTIONS, UPDATE, PRACK, MESSAGE, SUBSCRIBE<o:p></o:p></p>
<p class="MsoNormal">User-Agent: Bria iOS release 3.6.5 stamp 34728<o:p></o:p></p>
<p class="MsoNormal">Content-Length: 0<o:p></o:p></p>
<p class="MsoNormal">Expires: 120<o:p></o:p></p>
<p class="MsoNormal">P-hint: outbound<o:p></o:p></p>
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<p class="MsoNormal" style="border:none;padding:0cm">P-hint: outbound<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">User register to freeswitch successfully, however back calling to end-user is impossible bcz it is not going to reach end-phone using VIA haeder from REGISTER.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If I use aggressive-nat: freeswitch send invite calls to end-user to proxy2, which have then no idea where where to send the call (no route haeder in invite from freeswitch)<o:p></o:p></p>
<p class="MsoNormal">If I do not use aggressive-nat – freeswitch sends it’s invite directly to end-user phone(((<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In this example I’m using SIP over TCP, however the same is happened over UDP…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So, the question is how to register correctly to FS and preserve all VIA headers with fs_nat in contact db or some other way, so I could reach the end-user phone in same patch it is registering?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks a lot,<o:p></o:p></p>
<p class="MsoNormal">Dmitry.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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