Hello,

do you use something for nat traversal in kamailio config? Is the re-INVITE handled properly?

There might be a deadlock if the endpoint behind the nat is not sending any RTP packet, then the rtp relay (being it asterisk or rtpproxy) cannot learn the port in the nat router where to send the fax.

Cheers, Daniel

On 03/20/2009 11:43 AM, michel freiha wrote:

Dear All,

I'm trying to send FAX to an endpoint Behind NAT...The scenario i the following:

PSTN_GW-->Asterisk-->kamailio-->Endpoint behind NAT..

The FAX is failed and I got the following error log on asterisk:

Mar 20 09:21:09] WARNING[20388]: chan_sip.c:12409 handle_response_invite: Re-invite to non-existing call leg on other UA. SIP dialog '76c64f8373def68d5088690816c67493@Asterisk_IP'. Giving up

On kamilio everything looks great except the received value in the INVITE message...I guess it should be the Public IP of the endpoint and not asterisk IP address...

Can you please help me in order to find the real issue? the log is under http://pastebin.com/d1e7ba841

Regards