[Serusers] What's the best solutions ? RTP Proxy or STUN Server ?

[Olle E. Johansson]

Jiri Kuthan wrote:

> At 10:48 PM 12/2/2003, Olle E. Johansson wrote:
> 
>>Jiri Kuthan wrote:
>>
>>
>>>at best both, STUN does not help with all kinds of NATs. Use STUN
>>>if you can, RTP proxy otherwise. -jiri
>>
>>You can't choose between the fruit basket and an apple...
> 
> 
> I'm not good in agronomy so I can't compete in statements about fruits,
> apples and other healthy food.
I didn't involve tofu :-)
> 
> However as for NATs, the strategy "use STUN by default, rtp relay as last resort"
> works pretty well. STUN actually does the magic to let your calls through
> for many NATs. 
Your right, but for documentation I should say "use STUN discovery to make the
client behave correct for your network. If it doesn't work out, use a RTP relay".

Or have I missed something in regards to STUN? STUN, TURN, COMEDIA - I wish
we didn't have NAT's... IPv6 - a glory new world.

/O ;-)

> 
> -jiri
> 
> 
> 
>>STUN checks the NAT situation from a client point of view. STUN does not
>>do magic to let your calls through, it gives the UA an idea on how the
>>world looks and then the UA makes the choice on how to get traffic going
>>or give up and eat up all the fruits in the basket.
>>
>>If you have problems with your NAT, the RTP proxy might be part of the solution to
>>get calls going in combination with SER module Nathelper. The whole idea is
>>to take care of the media stream when the two SIP clients can't handle the
>>media stream across the NAT's. Yes, it shouldn't be necessary.
>>
>>Other solutions involve symmetric RTP, see
>>http://www.voip-info.org/wiki-RTP+Symmetric
>>
>>
>>More info on STUN:
>>http://www.voip-info.org/tiki-index.php?page=Stun
>>
>>Vovida.org have an Open Source STUN server.
>>Pointer here:
>>http://www.voip-info.org/tiki-index.php?page=Open%20Source%20Voip%20software
>>
>>Disclaimer: This is a messy area. I could be all wrong... :-)
>>
>>/Olle
> 
> 
> --
> Jiri Kuthan            http://iptel.org/~jiri/ 
> 


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*** Olle E. Johansson, oej at edvina.net

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