[Kamailio-Users] Loose Route / Re-Invite

[Alex Balashov]

Handle the request and the reply with far-end NAT traversal detection 
routines in the same way you would handle a non-sequential INVITE.

On 02/03/2010 03:05 PM, Brandon Armstead wrote:

> Hello everyone,
>
>     I'm just curious as to see what some of you guys do in regards to
> handling a Re-Invite that comes back downstream to a NATTED UAC.
>
> For example, call scenario:
>
> UAC -> Kamailio (Fix Nated Contact) -> PSTN
>
> Re-Invite Occurs:
>
> PSTN -> Kamailio -> UAC
>
> UAC (200 OK w/ NAT RFC1918 contact) -> Kamailio (branch flags at this
> point are not notifying of NAT, due to the downstream direction of the
> INVITE, so RFC1918 address exists, but does not fix_nated_contact) -> PSTN
>
> PSTN does not appropriately ACK.
>
>
> So, what are your guys solutions for solving this problem?
>
> Is the best way to add an attribute onto the contact header sent in
> original INVITE?  Are there other ways of handling?  What is the best,
> cleanest method.  Possible to handle with AVP's?
>
> Thanks in advanced for all of your input!
>
> Sincerely,
> Brandon
>
>
>
> _______________________________________________
> Kamailio (OpenSER) - Users mailing list
> Users at lists.kamailio.org
> http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
> http://lists.openser-project.org/cgi-bin/mailman/listinfo/users


-- 
Alex Balashov - Principal
Evariste Systems LLC

Tel    : +1 678-954-0670
Direct : +1 678-954-0671
Web    : http://www.evaristesys.com/