27 Sep
2018
27 Sep
'18
5:06 a.m.
Hello guys,
I'm following this guide:
https://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb
And I have the following schema:
Phone A -----> Kamailio -----> Asterisk -----> Phone B
(10.0.8.249) (10.0.6.123) (10.0.3.144) (10.0.13.23)
I think the flow it is like (because when UAC register to Asterisk, the
contact points to Kamailio IP):
1. Phone A --> Kamailio --> Asterisk
2. Asterisk --> Kamailio --> Phone B
In attachment is the pcap of the call, kamailio config.
The problem is that I never receive ACK after 200 OK and call drops after
30 seconds?
Kamailio version 5.1 and Asterisk version 15.1
Phones are grandstreams and also tested with microsip soft client and same
results... Like "Phone A" never sends ACK back
I tried different approaches to change contact header in 200 OK, because
is Asterisk IP. Disable NAT handling. Different "nat_uac_test" flags, but
still without success :(
Also tried with this NAT detection and manage routes (again without any
success) - source
https://github.com/sipwise/kamailio/blob/master/etc/kamailio.cfg
# Caller NAT detection
route[NATDETECT] {
#!ifdef WITH_NAT
force_rport();
if (nat_uac_test("19")) {
if (is_method("REGISTER")) {
fix_nated_register();
} else {
if(is_first_hop()) {
set_contact_alias();
}
}
setflag(FLT_NATS);
}
#!endif
return;
}
# RTPProxy control and signaling updates for NAT traversal
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(nat_uac_test("8")) {
rtpproxy_manage("co");
} else {
rtpproxy_manage("cor");
}
if (is_request()) {
if (!has_totag()) {
if(t_is_branch_route()) {
add_rr_param(";nat=yes");
}
}
}
if (is_reply()) {
if(isbflagset(FLB_NATB)) {
if(is_first_hop())
set_contact_alias();
}
}
#!endif
return;
}
Thanks in advance
Denislav Raychev Tsonev | Integration and Infrastructure Engineer |
Musala Soft JSC
www.musala.com | t: +359 2 969 58 21 | m: +359 878 270 965 | f:
+359 2 969 58 22
World Trade Center, 36 Dragan Tsankov blvd., Sofia 1057, Bulgaria
