Hello,
for nat trversal, I suggest you use the default kamailio.cfg from later versions 3.3.x or upcoming 4.0. Read the comments at the top of the file -- practically the routing logic for nat traversal is surrounded by WITH_NAT define.
o= line is not used for rtp relaying, but some clients expect to be the same as c=, at that moment it should be rewritten (or better rewrite it always to be sure that is not the reason of some no-audio problem).
Cheers, Daniel
On 3/1/13 12:47 PM, Khoa Pham wrote:
Hi, I mistype. What I want to know is what affects Kamailio decision in rewriting c= in SDP.
In http://kamailio.org/docs/ser-getting-started/SER-GettingStarted.pdf, I see that
if (isflagset(6)) { force_rport(); fix_nated_contact(); force_rtp_proxy(); }
Which means that Kamalio only cares if the caller is behind NAT or not.
Does it care about caller's symmetric NAT, using STUN, callee's nat type ?
On Fri, Mar 1, 2013 at 10:38 AM, Khoa Pham <onmyway133@gmail.com mailto:onmyway133@gmail.com> wrote:
Hi, I read in http://kamailio.org/docs/modules/1.4.x/nathelper.html that Kamailio might rewrite ip address in o= in SDP to facilitate NAT traversal. It may decide to use to original IP or use IP of RTP server. What factors affect its decision ? -- Khoa Pham HCMC University of Science Faculty of Information Technology-- Khoa Pham HCMC University of Science Faculty of Information Technology
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