[SR-Users] Order of record-route

Dirk Teurlings - Signet B.V. dteurlings at signet.nl
Fri Oct 7 10:37:21 CEST 2016


This was also my understanding. But as you can understand I want to be
certain. Currently this issue only rises with the Cisco hardware in
combination with the Barracuda firewall. Other appliances seem to
respect the order properly.

On 07-10-16 09:30, Daniel-Constantin Mierla wrote:
> I think the Route set as presented in the first email is correct. The
> Client is also having a proxy, so the caller device has to use the Route
> set from bottom up, sending first to its proxy, which should send to
> Kamailio's public IP. If the caller device is sending directly to
> kamailio, then there is something wrong with that device.
> 

To be complete, this is the entire message:

Via: SIP/2.0/UDP 4.3.2.1:5060;rport=5060;branch=z9hG4bK397b.fc14665.0
Via: SIP/2.0/UDP
10.0.1.50:5060;rport=57093;received=10.0.1.50;branch=z9hG4bK60450F49
Record-Route:
<sip:192.168.0.200;r2=on;lr;ftag=12D1120C-1C4;did=4c8.9203;nat=yes>
Record-Route: <sip:1.2.3.4;r2=on;lr;ftag=12D1120C-1C4;did=4c8.9203;nat=yes>
Record-Route: <sip:4.3.2.1;r2=on;lr;did=4c8.3f471377>
Record-Route: <sip:10.0.0.101;r2=on;lr;did=4c8.3f471377>
From: +2233445566 <sip:user at sip.domain.net>;tag=12D1120C-1C4
To: <sip:12345678 at sip.domain.net>;tag=as70bcd8b2
Call-ID: 6A54E603-894E11E6-8784FA54-A855A3EA at 10.0.1.50
CSeq: 102 INVITE
Server: sip.domain.net
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
INFO, PUBLISH
Supported: replaces, timer
Session-Expires: 1800;refresher=uas
Contact: <sip:+2233445566 at 192.168.0.201:5060>
Content-Type: application/sdp
Content-Length: 237

v=0
o=charles 2051523742 2051523742 IN IP4 1.2.3.4
s=sip.domain.net
c=IN IP4 1.2.3.4
t=0 0
m=audio 13772 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=sendrecv


Cheers,
Dirk



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