Hi,
________________________________ From: Iñaki Baz Castillo ibc@aliax.net Cc: users@lists.kamailio.org Sent: Monday, May 4, 2009 3:32:59 PM Subject: Re: [Kamailio-Users] two UACs behind same NAT
2009/5/4 dubravko caric dubravko_caric@yahoo.com:
Strange thing is that UAC#1 sends Ringing response and OK message with this information in Contact header: Contact: sip:bob@public_ip_address:31479;rinstance=e0f8548cf68b5b6e
Questions:
- Does this router use the painful SIP ALG? http://www.voip-info.org/wiki/view/Routers+SIP+ALG
didn't find anything regarding SIP and ALG in the device specification but I did find this http://www.easyofficephone.com/support/router-compatibility#linksys_wrt54g:
"This router is not recommended for use with voice over ip services using the stock firmware from Linksys. This model router is known to damage and modify SIP packets in such a way that it prevents voice over ip packets from being formatted correctly and can cause a multitude of problems."
i'll check everything once more...
but proxy forwards this Ringing response and OK message to UAC#2 with this information in Contact header: Contact: sip:bob@public_ip_address:0;rinstance=b18efeaa8a0e3f0f
How is possible that the proxy replaces 31479 with 0 ??? You must be doing something wrong with the Contact header.
i'm not doing any manipulation with Contact header, all other scenarios are working fine as long as I don't use two clients behind this specific router.
Thank you very much for your reply
Dubravko
-- Iñaki Baz Castillo ibc@aliax.net
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