Dear list
I am quite new to Kamailio and i have been able to solve some NAT Traversal
issues with symmetric SIP+RTP putting kamailio+rtpproxy behind NAT, i am
also load balancing some asterisk boxes for transcoding and some other
services like voicemail. Also i am using SIPp for load testing
Now the question is that, while everything is working great with NAT (even
when i am using SIPp for testing with low load) when i am about to test it
with more than 150 calls or something i am starting to get the following
error:
*kamailio[34549]: ERROR: rtpproxy [rtpproxy.c:2735]: force_rtp_proxy():
incorrect port 0 in reply from rtp proxy*
I have been trying to look at some SIP packets when the error starts and i
am not seeing anything out of the normal (while being quite difficult to
debug when having so many concurrent calls at SIP level)
My configuration doesnt have anything new, the only thing is that, because
Kamailio is behind NAT i used some ideas from some other users and debates
from this same mailing list:
*# RTPProxy control*
*route[NATMANAGE] {*
*#!ifdef WITH_NAT*
* if(is_request()) {*
* if(has_totag()) {*
* if(check_route_param("nat=yes")) {*
* setbflag(FLB_NATB);*
* }*
* }*
* }*
* if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB)))*
* return;*
* if(!route(FROMASTERISK)){*
* force_send_socket(10.0.1.207);*
* rtpproxy_manage("rw","10.0.1.206");*
* }else{*
* force_send_socket(10.0.1.206);*
* rtpproxy_manage("rw","10.0.5.203");*
* }*
* if (is_request()) {*
* if (!has_totag()) {*
* add_rr_param(";nat=yes");*
* }*
* }*
* if (is_reply()) {*
* if(isbflagset(FLB_NATB)) {*
* fix_nated_contact();*
* }*
*#!endif*
* return;*
*}*
This solution is based of someone's idea from this mailing list:
http://lists.sip-router.org/pipermail/sr-users/2013-January/076254.html
As you can see in my configuration, my "public network" is really private
network so i tweak the NATDETECT route to not include RFC1918 networks as
part of the detection
*# Caller NAT detection route*
*route[NATDETECT] {*
*#!ifdef WITH_NAT*
*if (nat_uac_test("1")) {*
* if (nat_uac_test("18")) {*
* force_rport();*
* if (is_method("REGISTER")) {*
* fix_nated_register();*
* } else {*
* fix_nated_contact();*
* }*
* setflag(FLT_NATS);*
* return;*
* }*
* }*
*#!endif*
* return;*
*}*
Also i would like to know how may i use RTPProxy logs?, i tried to
configure it like this:
/etc/rsyslog.conf
*# Kamailio logging*
*local0.*
-/var/log/kamailio.log*
*#RTPProxy logging*
*local3.*
/var/log/rtpproxy.log*
/etc/sysconfig/rtpproxy
*OPTIONS="-l 10.0.1.206 -A 10.0.5.203 -s udp:127.0.0.1:7722
<http://127.0.0.1:7722> -r /var/lib/rtpproxy/sessions -d DBUG:LOG_LOCAL3 -m
35000 -M 55000 -F"*
I cannot see anyhing in the logs
Thank you very much
Alejandro
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