[Serusers] Re: [Users] No rtpproxy when clients are behind the same nat

[Ladislav Andel]

I just add, try to look at 
http://www.iptel.org/ser/howtos/optimizing_the_use_of_rtp_proxy

Feel free to give me any feedback about the document. It is based on SER 
Ottendorf.

Lada

Atle Samuelsen wrote:
> Hi rafael,
>
> I might be wrong.. but it's REALLY hard to know if a user is behind the
> same nat.. due to that : 
>
> on sip-proxy you see that user Alice and Bob come from the same IP, and
> that they have the same "ip-range" in say contact. 
>
> you say "Oh, we see he's behind the same nat.."
> but..
>
> you dont really know what other equitment the other user has behind
> his nat. Say a user has 3 routers
> router 1: 
> 192.168.1.1 on "inside"
> 193.212.1.10 on "outside"
>
> router 2: is conected to inside of router 1: 
> 192.168.9.1 on "inside"
> 192.168.1.2 on "outside"
>
> router 3: is concted to router 2's inside:
> 192.168.1.1 on "inside"
> 192.168.9.1 on "outside"
>
> one phone is now connected to router 3, and one to router 1.
>
> on router 3 the phone gets the "internal" ip: 192.168.1.2. 
> on router 1 the phone gets the ip 192.168.1.3
>
> the phone on router 1, can not send rtppackets to the phone on router
> 3.. and router 3, can not send to router 1.. evenwhilethey are "looking"
> to be behind the same nat.
>
> - Atle
>
> ps: if anybody has a working solutio for this, exept ice/turn/stun
> whatever it's now called.. fel free to update me :)
>
> * Rafael J. Risco G.V. <rafael.risco at gmail.com> [070305 22:06]:
>   
>> Hi
>> does anyone has a working example for this escenario?
>>
>> thanks
>> rafael
>>
>> _______________________________________________
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>> Users at openser.org
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>>     
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