[SR-Users] Kamailio as SBC / LB Media-Servers farm

[Klaus Darilion]

Seems like the NAT traversal is just broken.

just some basic rules:

- Call fix_nated_contact only for request from the clients (although it 
shouldn't hurt if you call it for all requests)
- Whenever a message contains a session description call 
force_rtp_proxy(). Make sure to provide proper flags regarding the 
direction of the message. E.g. start rtpproxy listening to internal and 
external IP and provide the flags "ie" for requests from 
internal->external and "ei" for requests from external to internal.

regards
klaus

On 04.11.2011 08:51, Sammy Govind wrote:
> Thanks Alex for actually finding the thread for me- I'm reading these
> thoroughly and let me try these.
>
> Klaus, mhome=1 is a good tip let me try it now: The problem is that when
> I set-up the scenario as I mentioned using Private IPs the end user
> starts sending the media to the private IP of asterisk (which
> is of-course not found anywhere near UAC) - The Asterisk Server on the
> other hand sends media to the Public IP of the Client(fixed by the NAT
> route and RTPproxy route automatically.)
>
> What I've figured out theoretically is that i need to do the NAT address
> fixation in on-reply route from Asterisk servers. By fixing the c=
> header in Kamailio for the 200OK back to the client will make the Client
> software send media to the Kamailio/RTPproxy port and not on some
> private IP.
>
> I hope I made some sense in what I wrote, do let me know if
> any clarification is required.
>
> I'm just this one step away from publishing the setup on blog
> to benefit the community so any help from experts will be much much
> appreciated.
>
> Best Regards,
> Sammy
>
> On Fri, Nov 4, 2011 at 12:27 PM, Alex Balashov
> <abalashov at evaristesys.com <mailto:abalashov at evaristesys.com>> wrote:
>
>     The fundamental complications that often arise in such a setup are
>     summarised in these threads:
>
>     http://lists.sip-router.org/__pipermail/sr-users/2010-__October/065669.html
>     <http://lists.sip-router.org/pipermail/sr-users/2010-October/065669.html>
>
>     http://lists.sip-router.org/__pipermail/sr-users/2011-__September/069975.html
>     <http://lists.sip-router.org/pipermail/sr-users/2011-September/069975.html>
>
>     http://lists.sip-router.org/__pipermail/sr-users/2011-__September/070029.html
>     <http://lists.sip-router.org/pipermail/sr-users/2011-September/070029.html>
>
>     --
>     Alex Balashov - Principal
>     Evariste Systems LLC
>     260 Peachtree Street NW
>     Suite 2200
>     Atlanta, GA 30303
>     Tel: +1-678-954-0670 <tel:%2B1-678-954-0670>
>     Fax: +1-404-961-1892 <tel:%2B1-404-961-1892>
>     Web: http://www.evaristesys.com/
>
>
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