Re: [Ekiga-list] Two ekiga logins on the same PC won't work?

[ael <law_ence dev ntlworld com>]

Rob wrote:
> John Feagans wrote on Sat, 5 Dec 2009 07:44:

> If SSH would operate like Ekiga, only one instance of SSH is allowed
> from my home network. However, I've never encountered problems
> with the number of SSH connections (and I have many connections
> simultaneously active!).
>
> I don't think SSH uses a revolutionary protocol; it's rather common
> and standard.

The NAT translation looks after that. The complication with ekiga (and 
other VOIP) is the need for another "unknown" machine to be introduced
which is where the STUN protocol comes in. As long as you have a CONE 
NAT or use port triggering to open up a local small temporary "CONE", 
everything should "just" work.

So sip voip is different from ordinary network applications: the server 
must somehow "introduce" two parties to each other. But NAT firewall 
routers are designed to bounce 3rd party incoming traffic. Hence the 
extra complication.

ael