Hi folks,
Trying to hook up a new endpoint but am having an issue. Kamailio is in front of an Asterisk box.
They send an INVITE, we send 100, then 200 OK. However, when they send their ACK, the RURI is not set to the Contact of the 200, instead it is<number>@<proxy ip>. This causes the ACK to get routed to the proxy itself and the call fails.
82.160.190.100:5060 = Kamailio IP Port
198.201.240.242:5080 = Asterisk IP/Port
182.33.174.10:5060 = Provider endpoint
The far endpoint say they cannot fix the RURI - should I be able to handle this ACK below? My understanding is the ACK's RURI should be the Contact of the 200 OK.
200 OK sent from us to the Provider (Contact shows correct URI)
=========================================================
2025/01/15 17:14:49.470634 82.160.190.100:5060 -> 182.33.174.10:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 182.33.174.10;branch=z9hG4bKefc7.ad07f2d3.0
Via: SIP/2.0/UDP 182.33.174.39:5060;received=182.33.174.39;branch=z9hG4bK5bbf9591;rport=5060
Record-Route: <sip:1800715080@82.160.190.100:5061;r2=on;lr=on;ftag=as0b42eef3;did=f2e.ade2;nat=yes>
Record-Route: <sip:1800715080@82.160.190.100;r2=on;lr=on;ftag=as0b42eef3;did=f2e.ade2;nat=yes>
Record-Route: <sip:182.33.174.10;lr;ftag=as0b42eef3>
From: "0737965510" <sip:0737966610@182.33.174.39>;tag=as0b42eef3
To: <sip:1800715080@82.160.190.100>;tag=as4133584e
Call-ID: 480dc17b3f88516f364778dc4b2528da@182.33.174.39:5060
CSeq: 102 INVITE
Server: Asterisk PBX 18.9.0
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces
Contact: <sip:1800715080@198.201.240.242:5080>
Content-Type: application/sdp
Content-Length: 314 ,
ACK Reply from Provider to Us (RURI points to Kamailio ip:port now
===========================================================
2025/01/15 17:14:49.478119 182.33.174.10:5060 -> 82.160.190.100:5060
ACK sip:1800715080@82.160.190.100:5060 SIP/2.0
Via: SIP/2.0/UDP 182.33.174.10;branch=z9hG4bKefc7.ad07f2d3.2
Via: SIP/2.0/UDP 182.33.174.39:5060;received=182.33.174.39;branch=z9hG4bK55656469;rport=5060
Route: <sip:1800715080@82.160.190.100;r2=on;lr=on;ftag=as0b42eef3;did=f2e.ade2;nat=yes>,sip:1800715080@82.160.190.100:5061;r2=on;lr=on;ftag=as0b42eef3;did=f2e.ade2;nat=yes>
Max-Forwards: 69
From: "0737965510" <sip:0737966610@182.33.174.39>;tag=as0b42eef3
To: <sip:1800715080@82.160.190.100>;tag=as4133584e
Contact: <sip:0737965510@182.33.174.39:5060>
Call-ID: 480dc17b3f88516f364778dc4b2528da@182.33.174.39:5060
CSeq: 102 ACK
Thanks