Hi,

 

I have a question regarding the below ACK response Kamilaio receives from a carrier. Can  someone please help me understand why the “Route: sip:callmanager@192.168.160.43:5060> sent from Kamailio is missing a “<” as shown in the captures below? Our Internal proxy is treating that as a malformed header and dropping the packet.

 

 

ACK from CARRIER

 

U 2012/08/01 18:32:52.219852 4.55.18.227:5060 -> 192.168.160.47:5060

ACK sip:callmanager@192.168.160.43:5060 SIP/2.0.

Via: SIP/2.0/UDP 4.55.18.227:5060;branch=z9hG4bK04B0eef33040e9b8e70.

From: sip:+14088442721@4.55.18.227:5060;tag=gK043001e3.

To: sip:+19728931740@192.168.160.47:5060;tag=b307370c678f3b44.

Call-ID: 295226_50030734@4.55.18.227.

CSeq: 18079 ACK.

Max-Forwards: 70.

Route: <sip:192.168.160.47:5060;lr=on>.

Route: <sip:2c6c6d1ab58c623912f6b8a6ee526982@192.168.160.44:5060>.

Content-Length: 0.

.

ACK FORWARDED TO SIP PROXY

 

U 2012/08/01 18:32:52.220612 192.168.160.47:5060 -> 192.168.160.44:5060

ACK sip:2c6c6d1ab58c623912f6b8a6ee526982@192.168.160.44:5060 SIP/2.0.

Via: SIP/2.0/UDP 192.168.160.47;branch=z9hG4bKcydzigwkX.

Via: SIP/2.0/UDP 4.55.18.227:5060;branch=z9hG4bK04B0eef33040e9b8e70.

From: sip:+14088442721@4.55.18.227:5060;tag=gK043001e3.

To: sip:+19728931740@192.168.160.47:5060;tag=b307370c678f3b44.

Call-ID: 295226_50030734@4.55.18.227.

CSeq: 18079 ACK.

Max-Forwards: 69.

Content-Length: 0.

Route: sip:callmanager@192.168.160.43:5060>.

I have attached the config file for you reference. Kamailio version is 3.2.3

 

Thank You for your help/input in advance

Varsha