Hi Reda A bit late for a reply but I found your post recently and it helped me to solve a similar problem, so I wanted to share one possible solution.
On 21 January 2012 23:19, Reda Aouad <reda.ao...@gmail.com> wrote: > After endless tests, I tried to replace record_route_preset with insert_hf, > writing the complete record route headers. A light started to come out of > the tunnel..... > > Suppose User A is registered to port 53, User B to port 5060. > > In the case of double record route, when A sends an INVITE to B, I write the > following in the SIP header of the INVITE forwarded to B : > Record-Route: <sip:public_ip:5060;r2=on;lr=on> > Record-Route: <sip:public_ip:53;r2=on;lr=on> > > The first transaction, INVITE / 200OK goes well, with Kamailio forwarding > packets correctly from the corresponding socket of each user. > > The problem arises when User B sends BYE to the 5060 port, with both route > headers in the SIP header of the BYE. I get the following error : > WARNING: rr [loose.c:747]: no socket found for match second RR > > after which Kamailio forwards the BYE from the 5060 socket to User A. User A > being registered on port 53, ignores the packet coming with source port > 5060. The BYE is never replied to. > > I guess that means that Kamailio is not able to find the private_ip:53 > socket from the public_ip:53 record-route header. > I hope it was clear. One way to get around this is to populate the RR with a hostname instead of an address. Then you can configure it so that the external clients resolve public_ip but the Kamailio server itself resolves private_ip. This can be done through an entry in /etc/hosts to override the public DNS entry. Not exactly elegant but it works for me. > I think there's a fundamental issue with running Kamailio behind NAT and > listening on multiple port numbers. Am I the only one suffering from this > type of configuration? > > (Part of the problem is also tied to dumb ALG NAT routers which try to > out-smart SIP servers, without which I wouldn't run Kamailio on multiple > ports, and life would be much easier) Regards, Richard _______________________________________________ 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
