[Serusers] Nat Helper + Media Proxy

[Brett N]

Look, think of it this way..

When a NATTED phone makes a sip call, it places it's NATTED address in the
header information of the call.. Making the far end phone send audio to
this UNREACHABLE ip address.. Nathelper will assist you in REWRITING the
SIP message such that you REMOVE the private addresses your NATTED phone
has put in the SIP message and instead places the actual IP/port your
phone uses to talk to SER with into the message. This in itself for most
people will allow a natted phone to make phone calls..

Now if you are going from nat to nat or having trouble  with one way calls
or the like, or if you just want more control over the audio path, you can
try mediaproxy. Chances are that you'll either need something like
nathelper to fix the SIP messaging OR  your proxy will need to be able to
ping and be ping the proxy. OR your media proxy module will need to be
able to do this rewriting for you.

Hope that helps.
-Brett

On Mon, March 13, 2006 10:44 am, Darren Sessions wrote:
> I've been reading the docs on nathelper and mediaproxy and am curious
> about the possibility of implementing both modules/functionalities on
> the same proxy (with the dispatcher and media proxy scripts running
> on separate boxes).
>
> The scenario would be to use either nathelper functionality or
> mediaproxy functionality based on results from something like
> client_nat_test, nat_uac_test, or another function like these. This
> would prevent unnecessary local bandwidth consumption by providing
> the correct nat transversal mechanism.
>
> After extensive googling, I still haven't been able to find a working/
> semi-working example on this type of combination.
>
> Does anyone have any good pointers, example configs / basic configs,
> or ideas?
>
> Thanks in advance,
>
>   - Darren
>
> CALL
>     |
>     |->  Analysis
> 		|
> 		|-> NATHELPER
>                 or
>                  |-> MEDIAPROXY
>
>
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