(Sorry for the double post) I trying to debug why Kamailio is dropping certain ACKs. I have debug level set to 4 and cfgtrace on. The last thing I see in the log for my missing ACKs is: Aug 26 12:22:29 eng-reg1 kamailio: ERROR: *** cfgtrace: c=[/etc/kamailio/kamailio.cfg] l=789 a=16 n=if Aug 26 12:22:29 eng-reg1 kamailio: ERROR: *** cfgtrace: c=[/etc/kamailio/kamailio.cfg] l=786 a=25 n=check_route_param Aug 26 12:22:29 eng-reg1 kamailio: DEBUG: rr [loose.c:974]: check_route_param(): params are <;alias=172.16.3.65~5060~1> Aug 26 12:22:29 eng-reg1 kamailio: ERROR: *** cfgtrace: c=[/etc/kamailio/kamailio.cfg] l=795 a=16 n=if Which corresponds to these lines in the config: if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB))) { return; } if (is_request()) { <---------LINE 795 if (!has_totag()) { if(t_is_branch_route()) { add_rr_param(";nat=yes"); } } } Why would that be the last line that is traced? Is Kamailio really not processing past here? -- Marc _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users