Hi Everyone,
I figured it out. I needed to add fix_nated_contact() on the reply route for
the notify messages. The 200 OK messages were overwriting the contact from the
corrected SUBSCRIBE request. After doing this, OpenSIPS now sends the NOTIFY
messages to the correct address.
if (has_totag()) {
if (topology_hiding_match()) {
xlog("Successfully matched this request to a topology
hiding dialog. \n");
xlog("Calller side callid is $ci \n");
xlog("Callee side callid is $TH_callee_callid \n");
if (is_method("NOTIFY")){
fix_nated_contact();
t_on_reply("NOTIFYReply");
}
t_relay();
exit;
}
onreply_route[NOTIFYReply] {
#NAT for 200 OK replys
if (t_check_status("(200)")) {
fix_nated_contact();
}
}
Thank you,
-Sam Anderson
-----Original Message-----
From: Samuel Anderson
Sent: Thursday, June 25, 2020 5:29 PM
To: '[email protected]' <[email protected]>
Subject: SUBSCRIBE & NOTIFY - NAT Problems
Hi Everyone,
I use OpenSIPS as an SBC for an Asterisk server. The OpenSIPS server is
multi-homed and has an interface on the WAN and DMZ. I'm able to make calls and
send sequential requests in a dialog, such as INVITEs and BYEs, from endpoints
behind NAT without any issues. My problem is when the endpoints try to
SUBSCRIBE, and Asterisk sends a NOTIFY message back. OpenSIPS is sending the
NOTIFY to the original contact header specified in the SUBSCRIBE request. It is
not sending the NOTIFY to the address it received it from. It does rewrite the
contact header when the SUBSCRIBE message is sent to Asterisk, and OpenSIPS
also sends the 200 OK reply to the correct address.
How can I configure OpenSIPS to send the additional NOTIFY messages within the
dialog to the address it received it from? I've tried to create a dialog for
SUBSCRIBE requests, but it looks like that only works for INVITEs. Any help
would be appreciated. It currently works fine with INVITEs and BYEs.
I use double record routes, topology hiding, and the dialog module. I also set
"fix_nated_contact" when the SUBSCRIBE is received.
Thank you for your assistance.
-Sam
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