[OpenSER-Users] cancel going to 127.0.0.1

Hi, I seem to remember reading about this problem before, but couldn't find any pointers by searching... On the following setup with Openser 1.1: UA -> Openser/Mediaproxy -> PSTN-Gateway most calls pass just fine and cancel fine, but some don't stop properly. If the UA cancels the call the cancel goes: gateway ip= 1.2.3.204 proxy ip= 1.2.3.201 ua ip = 81.1.2.223 U 81.1.2.223:5071 -> 1.2.3.201:5060 CANCEL sip:0475711111@sipc.example.com SIP/2.0. Via: SIP/2.0/UDP 192.168.1.11:5071;branch=z9hG4bK-2f6ae216. From: 002 <sip:101211111@sipc.example.com>;tag=a27b4fe18ca60f4ao0. To: <sip:0475711111@sipc.example.com>. U 1.2.3.201:5060 -> 127.0.0.1:5060 CANCEL sip:0475711111@sipc.example.com SIP/2.0. Record-Route: <sip:1.2.3.201;lr=on;ftag=a27b4fe18ca60f4ao0>. Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bK7f9f.b68d8185.0. Via: SIP/2.0/UDP 192.168.1.11:5071;received=81.1.2.223;branch=z9hG4bK-2f6ae216. From: 002 <sip:101211111@sipc.example.com>;tag=a27b4fe18ca60f4ao0. To: <sip:0475711111@sipc.example.com>. I 127.0.0.1 -> 1.2.3.201 3:3 ....E..o..@.@...Y............[h.CANCEL sip:0475711111@sipc.example.com SIP/2.0. Record-Route: <sip:1.2.3.201;lr=on;ftag=a27b4fe18ca60f4ao0>. Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bK7f9f.b68d8185.0. Via: SIP/2.0/UDP 192.168.1.11:5071;received=81.1.2.223;branch=z9hG4bK-2f6ae216. From: 002 <sip:101211111@sipc.example.com>;tag=a27b4fe18ca60f4ao0. To: <sip:0475711111@sipc.example.com>. And then it keeps looping between 127.0.0.1 and 1.2.3.201. For some reason openser sends the CANCEL to the loopback interface instead of on to the gateway. Is this a recognizable problem or should I post a full trace and config file? Thanks for looking, Richard.