[Serusers] 200 - Cancelling Message Problem

Wed Nov 10 23:20:44 CET 2004

Hello List.
	I have a problem with CANCEL a call behind a NAT enviroment.   When
i made a call from an endpoint registered in my SER SIP Server with a public
IP the CANCEL procces is like behind.  As you can see there is a "200 -
Cancelling" message (third message) that goes from SER to Endpoint in the
port 5060.

U xx.xx.148.235:5060 -> xx.xx.154.35:5060
  CANCEL sip:2408171 at sipproxy.mydomain.com SIP/2.0
Via: SIP/2.0/UDP xx.xx.148.235:5060;branch=z9hG4bKeb416aaba486
From: <sip:5555848111 at sipproxy.mydomain.com>;tag=eb416aaba4
To: <sip:2408171 at sipproxy.mydomain.com>
Call-ID: ebaca041-57eb-6aef-80ab-0002a4004086 at xx.xx.148.235
CSeq: 86 CANCEL
Date: Sun, 21 Nov 2004 14:57:56 GMT
User-Agent: AddPac SIP Gateway
Content-Length: 0
Max-Forwards: 70

#
U xx.xx.154.35:5060 -> xx.xx.148.231:5060
  CANCEL sip:005622408171 at xx.xx.148.231:5060 SIP/2.0
Record-Route: <sip:2408171 at xx.xx.154.35;ftag=eb416aaba4;lr=on>
Via: SIP/2.0/UDP xx.xx.154.35;branch=z9hG4bKe07.c5730461.0
Via: SIP/2.0/UDP xx.xx.148.235:5060;branch=z9hG4bKeb416aaba486
From: <sip:5555848111 at sipproxy.mydomain.com>;tag=eb416aaba4
To: <sip:2408171 at sipproxy.mydomain.com>
Call-ID: ebaca041-57eb-6aef-80ab-0002a4004086 at xx.xx.148.235
CSeq: 86 CANCEL
Date: Sun, 21 Nov 2004 14:57:56 GMT
User-Agent: AddPac SIP Gateway
Content-Length: 0
Max-Forwards: 69
P-hint: H323-Side

#
U xx.xx.154.35:5060 -> xx.xx.148.235:5060
  SIP/2.0 200 cancelling
Via: SIP/2.0/UDP xx.xx.148.235:5060;branch=z9hG4bKeb416aaba486
From: <sip:5555848111 at sipproxy.mydomain.com>;tag=eb416aaba4
To:
<sip:2408171 at sipproxy.mydomain.com>;tag=8acf748d21b6bc66e44e951325ba3f1c-4ce
1
Call-ID: ebaca041-57eb-6aef-80ab-0002a4004086 at xx.xx.148.235
CSeq: 86 CANCEL
Server: Sip EXpress router (0.8.14-3 (i386/linux))
Content-Length: 0
Warning: 392 xx.xx.154.35:5060 "Noisy feedback tells:  pid=23760
req_src_ip=xx.xx.148.235 req_src_port=5060
in_uri=sip:2408171 at sipproxy.mydomain.com
out_uri=sip:005622408171 at xx.xx.148.231:5060 via_cnt==1"

#
U xx.xx.154.35:5060 -> xx.xx.148.235:5060
  SIP/2.0 487 Request cancelled
Via: SIP/2.0/UDP xx.xx.148.235:5060;branch=z9hG4bKeb416aaba486
From: <sip:5555848111 at sipproxy.mydomain.com>;tag=eb416aaba4
To:
<sip:2408171 at sipproxy.mydomain.com>;tag=8acf748d21b6bc66e44e951325ba3f1c-4ce
1
Call-ID: ebaca041-57eb-6aef-80ab-0002a4004086 at xx.xx.148.235
CSeq: 86 INVITE
Server: Sip EXpress router (0.8.14-3 (i386/linux))
Content-Length: 0
Warning: 392 xx.xx.154.35:5060 "Noisy feedback tells:  pid=23760
req_src_ip=xx.xx.148.235 req_src_port=5060
in_uri=sip:2408171 at sipproxy.mydomain.com
out_uri=sip:005622408171 at xx.xx.148.231:5060 via_cnt==1"

#
U xx.xx.148.231:5060 -> xx.xx.154.35:5060
  SIP/2.0 200 OK
Via: SIP/2.0/UDP xx.xx.154.35;branch=z9hG4bKe07.c5730461.0
Via: SIP/2.0/UDP xx.xx.148.235:5060;branch=z9hG4bKeb416aaba486
From: <sip:5555848111 at sipproxy.mydomain.com>;tag=eb416aaba4
To: <sip:2408171 at sipproxy.mydomain.com>
Call-ID: ebaca041-57eb-6aef-80ab-0002a4004086 at xx.xx.148.235
CSeq: 86 CANCEL
User-Agent: AddPac SIP Gateway
Content-Length: 0
Record-Route: <sip:2408171 at xx.xx.154.35;ftag=eb416aaba4;lr=on>

#
U xx.xx.148.231:5060 -> xx.xx.154.35:5060
  SIP/2.0 487 Request Terminated
Via: SIP/2.0/UDP xx.xx.154.35;branch=z9hG4bKe07.c5730461.0
Via: SIP/2.0/UDP xx.xx.148.235:5060;branch=z9hG4bKeb416aaba486
From: <sip:5555848111 at sipproxy.mydomain.com>;tag=eb416aaba4
To: <sip:2408171 at sipproxy.mydomain.com>;tag=b9410d20a4
Call-ID: ebaca041-57eb-6aef-80ab-0002a4004086 at xx.xx.148.235
CSeq: 86 INVITE
User-Agent: AddPac SIP Gateway
Content-Length: 0

#
U xx.xx.154.35:5060 -> xx.xx.148.231:5060
  ACK sip:005622408171 at xx.xx.148.231:5060 SIP/2.0
Via: SIP/2.0/UDP xx.xx.154.35;branch=z9hG4bKe07.c5730461.0
From: <sip:5555848111 at sipproxy.mydomain.com>;tag=eb416aaba4
Call-ID: ebaca041-57eb-6aef-80ab-0002a4004086 at xx.xx.148.235
To: <sip:2408171 at sipproxy.mydomain.com>;tag=b9410d20a4
CSeq: 86 ACK
User-Agent: Sip EXpress router(0.8.14-3 (i386/linux))
Content-Length: 0

#
U xx.xx.148.235:5060 -> xx.xx.154.35:5060
  ACK sip:2408171 at sipproxy.mydomain.com SIP/2.0
Via: SIP/2.0/UDP xx.xx.148.235:5060;branch=z9hG4bKeb416aaba486
From: <sip:5555848111 at sipproxy.mydomain.com>;tag=eb416aaba4
To:
<sip:2408171 at sipproxy.mydomain.com>;tag=8acf748d21b6bc66e44e951325ba3f1c-4ce
1
Call-ID: ebaca041-57eb-6aef-80ab-0002a4004086 at xx.xx.148.235
CSeq: 86 ACK
Content-Length: 0
Max-Forwards: 70

Now when i made the same call and i CANCEL it, the "200-Cancelling" message
goes directly to port 5060 and not the rport (64435).  Why is that?

U xx.xx.148.244:64435 -> xx.xx.154.35:5060
  CANCEL sip:2408196 at sipproxy.mydomain.com SIP/2.0
Via: SIP/2.0/UDP 192.168.0.191:5060;branch=z9hG4bK2542303ca430
From: <sip:5555848110 at sipproxy.mydomain.com>;tag=2542303ca4
To: <sip:2408196 at sipproxy.mydomain.com>
Call-ID: 252eb142-ae30-30f0-803c-0002a400f1e9 at 192.168.0.191
CSeq: 30 CANCEL
Date: Thu, 16 Jun 2005 07:45:57 GMT
User-Agent: AddPac SIP Gateway
Content-Length: 0
Max-Forwards: 70

#
U xx.xx.154.35:5060 -> xx.xx.148.231:5060
  CANCEL sip:7072408196 at xx.xx.148.231:5060 SIP/2.0
Record-Route: <sip:2408196 at xx.xx.154.35;ftag=2542303ca4;lr=on>
Via: SIP/2.0/UDP xx.xx.154.35;branch=z9hG4bKe6c7.e2501f15.0
Via: SIP/2.0/UDP
192.168.0.191:5060;received=xx.xx.148.244;branch=z9hG4bK2542303ca430
From: <sip:5555848110 at sipproxy.mydomain.com>;tag=2542303ca4
To: <sip:2408196 at sipproxy.mydomain.com>
Call-ID: 252eb142-ae30-30f0-803c-0002a400f1e9 at 192.168.0.191
CSeq: 30 CANCEL
Date: Thu, 16 Jun 2005 07:45:57 GMT
User-Agent: AddPac SIP Gateway
Content-Length: 0
Max-Forwards: 69
P-hint: H323-Side

#
U xx.xx.154.35:5060 -> xx.xx.148.244:5060
  SIP/2.0 200 cancelling
Via: SIP/2.0/UDP
192.168.0.191:5060;branch=z9hG4bK2542303ca430;received=xx.xx.148.244
From: <sip:5555848110 at sipproxy.mydomain.com>;tag=2542303ca4
To:
<sip:2408196 at sipproxy.mydomain.com>;tag=8acf748d21b6bc66e44e951325ba3f1c-b28
c
Call-ID: 252eb142-ae30-30f0-803c-0002a400f1e9 at 192.168.0.191
CSeq: 30 CANCEL
Server: Sip EXpress router (0.8.14-3 (i386/linux))
Content-Length: 0
Warning: 392 xx.xx.154.35:5060 "Noisy feedback tells:  pid=23757
req_src_ip=xx.xx.148.244 req_src_port=64435
in_uri=sip:2408196 at sipproxy.mydomain.com
out_uri=sip:7072408196 at xx.xx.148.231:5060 via_cnt==1"

This cause a endless CANCEL message flow coming from my endpoint.

Hope that someone can help me here
Thanks in advance
Best Regards

Ricardo Martinez