[Serusers] doubts about nathelper

[Lucas Aimaretto]

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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