On Friday 21 May 2004 22:27, Toad wrote:
> > STUN is used to determine whether you are behind NAT. If you are then you
> > need a third party to start connections to others behind NAT. The third
> > party need not be a single server but can be a network of
> > communicating servers (such as all freenet servers not behind NAT). When
> > the connection is started the third party is no longer needed (i.e. data
> > flows directly between the two parties).
>
> How is that possible? Does it involve TCP spoofing?

As i understand it, STUN means you send UDP from port X anywhere outside.
Following UDP replies to port X are routed back to the originating box.
Now, the special point is, when another IP from outside contacts port X, the 
packets are routed aswell. It is said most cheap NATs do this.
So you send UDP outside and voila, others (not only the particular 
destination) may contact you.

mfg The Bishop

p.s. hope i didn't mess reality up :-)
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