Why is erroneous to have the contact header with the backend IP? With the record-route on the 200 Ok, the ACK should be directed to the backend IP, but containing a route header pointing to the Kamailio IP. Kamailio will loose_route() this request and send it to the backend server as expected.
Regards, On Wed, Mar 5, 2014 at 3:53 PM, Marc Soda <ms...@coredial.com> wrote: > Thanks Olle. I am calling record_record() on the initial INVITE. In > fact, the OK has a Record-Route header: > > 1.1.1.1 is the endpoint > 2.2.2.2 is the kamailio proxy > 3.3.3.3 is the backend server > > SIP/2.0 200 OK > Via: SIP/2.0/UDP 1.1.1.1:60077 > ;rport=46110;branch=z9hG4bK-d8754z-eb9768c7e3a2d1e7-1---d8754z- > Record-Route: <sip:2.2.2.2;lr=on;ftag=db634167;nat=yes> > From: <sip:sip7878_s...@edge.domain.com;transport=UDP>;tag=db634167 > To: <sip:2155555...@edge.coredial.com;transport=UDP>;tag=as3f9cf263 > Call-ID: MzI5YTA3YmRkNzFiZjhhZTRkNTc2OGE1ZTc5ZjdjMmM. > CSeq: 2 INVITE > User-Agent: CoreDialPBX > Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO > Supported: replaces > Contact: <sip:21555555555@3.3.3.3> > Content-Type: application/sdp > Content-Length: 266 > > v=0 > o=root 13486 13487 IN IP4 3.3.3.3 > s=session > c=IN IP4 3.3.3.3 > t=0 0 > m=audio 29990 RTP/AVP 0 8 101 > a=rtpmap:0 PCMU/8000 > a=rtpmap:8 PCMA/8000 > a=rtpmap:101 telephone-event/8000 > a=fmtp:101 0-16 > a=silenceSupp:off - - - - > a=ptime:20 > a=sendrecv > > I don't think 3.3.3.3 should show up anywhere, it should be rewritten to > 2.2.2.2. > > > On Wed, Mar 5, 2014 at 1:34 PM, Olle E. Johansson <o...@edvina.net> wrote: > >> >> On 05 Mar 2014, at 18:30, Marc Soda <ms...@coredial.com> wrote: >> >> I have Kamailio setup as a proxy in front of a backend server (Asterisk). >> When I make a call through the proxy, the Contact header in the 200 OK >> that is returned to the client has the IP of the backend server in it. >> Thus, the client is sending it's ACK directly to the backend server. >> >> Is there a special method to rewrite the Contact header to be Kamailio's >> IP? >> >> Check record_route() in the default configuration script. You need to add >> a route set by using record_route() in the initial transaction. >> >> Cheers, >> /O >> >> >> Where is a good place in the config to do this? (my config is loosely >> based on this: >> http://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb >> ) >> >> Thanks! >> Marc >> >> _______________________________________________ >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >> sr-users@lists.sip-router.org >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >> >> >> >> _______________________________________________ >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >> sr-users@lists.sip-router.org >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >> >> > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users > > -- Carlos http://caruizdiaz.com http://ngvoice.com +595981146623
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