[Asterisk-Users] how to add stun functionality in asterisk

[Jerry Glomph Black]

What about stund?

http://freshmeat.net/projects/stund/

It has a working client, and a 'Freely Distributable' license.

On Tue, 21 Feb 2006, Olle E Johansson wrote:

>
> 21 feb 2006 kl. 21.47 skrev Rich Adamson:
>
>> Stun's primary role in life is to operate as an internet accessible
>> application to determine the outside IP address of your firewall or
>> nat box. Its usually called (by a sip phone as one example) at startup,
>> and the stun server returns the real outside IP address.
>
> Right. And to add to this excellent explanation:
>
> STUN is a discovery protocol. It does not change anything in your network.
> It discovers properties about a NAT between the device and the STUN server 
> and
> thus helps the phone to automatically configure communication parameters that 
> assists NAT traversal.
>
> Outside IP address is one of them, but even more important is the 
> functionality
> of the NAT - how it can handle SIP signalling from one endpoint (sip proxy) 
> and audio from a completely different and unknown endpoint (the phone).
>