[Serusers] doubts about nathelper

[jimmy huang]

Maybe be this is helpful for you
http://www.informatik.uni-bremen.de/~prelle/terena/cookbook/Cookbook_D2/ch04s07.html


----- Original Message ----- 
From: "Lucas Aimaretto" <lucas at cyneric.com>
To: <serusers at lists.iptel.org>
Sent: Wednesday, February 02, 2005 11:56 PM
Subject: [Serusers] doubts about nathelper


> I'm having trouble in using STUN with some UserAgents, which are not nat
> friendly at all.
> So, I've been reading about nathelper, but I did not find how does it
> work or how do I need to configure my ser.cfg to have this solution
> implemented.
>
> I'd like to know what it the function theory of nathelper (not about its
> code, but yes how does it work) and how should I need to touch my
> ser.cfg and also how to configure my UserAgent.
>
> Will nathelper help me with ANY UserAgent behind a NAT, no matter what
> kind of nat am I using and no matter whether my nat preserves or not the
> udp ports for the rtp connection ??
> Does NAThelper impacts in the quality of the communication (QoS) ?
> Is NATHelper an outboundproxy ?
> Is NATHelper a session-border-controller ?
>
> The thing is I'm telling my UserAgent to use some XXX rtp port, but,
> automagically (ufff) my linksys changes the port, and so I get one-way
> audio. I need to solve this urgently. It gets worse if I have many
> UserAgents behind this nat.
> I've also noticed that when broadband router (d-link) does not preserve
> ports, and assigns them randomly, whenever the link to internet goes
> down and up again, my UserAgent needs to talk again with STUN to find
> out its port. Just a mess !!!
>
> Hope you can help me out in getting to know nathelper and configuring
> it.
>
> Thanx in advance
>
> Regards,
>
> Lucas
>
>
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