[OpenSIPS-Users] ACK and NAT problem
Nawfel Oujdi
noujdi at egtelecom.es
Wed Nov 24 13:33:03 CET 2010
Hi!!
I load balancing between 2 asterisk,the load_balancer it s done correctly
but the calls hangs up after 10 second approximately. My setup is (just with
1 asterisk):
Cisco GW ----(NAT)----> Opensips --------> Asterisk
My problem is that opensips never receive the ACK from Cisco GW even if this
last one sent it.
CISCO logs:
ACK sip:911126667@*public ip of asterisk* :5060 SIP/2.0
Route: <sip:*internal ip of opensips*
;lr=on;ftag=F40B44FC-18A6;did=1cd.369d0f26>
I think cisco reply ACK to Asterisk through the internal ip of opensips
cause opensips did not provide Cisco with his public IP (NAT).
Can somebody help me with this??
I heard about fix_nated_contact() but i don't know how and where in my
script¿Somebody send me examples ?
Thank you very much!!
my opensips.cfg:
route{
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","looping");
exit;
}
if ($rU==NULL) {
# request with no Username in RURI
sl_send_reply("484","Address Incomplete");
exit;
}
if (!has_totag()) {
# initial request
record_route();
} else {
# sequential request -> obey Route indication
loose_route();
t_relay();
exit;
}
if ( is_method("CANCEL") ) {
if ( t_check_trans() )
t_relay();
exit;
}
# from now on we have only the initial requests
if (!is_method("INVITE")) {
send_reply("405","Method Not Allowed");
exit;
}
# detect resources and do balancing
if (method=="INVITE") {
load_balance("1","calls");
}
# LB function returns negative if no suitable destination (for
requested resources) is found,
# or if all destinations are full
if ($retcode<0) {
sl_send_reply("500","Service full");
exit;
}
xlog("Selected destination is: $du\n");
# send it out
if (!t_relay()) {
sl_reply_error();
}
}
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