Re: [GD-General] NAT Negotiation

[Brett B. <res...@ga...>]

> This post seems like you are making the topic more complex than it =
really=20
> should be.=20

Sadly, no :-)

> So, if you have a simple protocol in which all connections originate =
from=20
> _behind_ the NAT device, destined for the server, you won't have any =
issues.=20

The problem is with peer-to-peer. The NAT opened a hole for the server, =
but not for another client who is also behind a NAT. Even if both =
clients send each other packets on the same port, there is no guarantee =
that the specified port may open up. It could be random, incremented one =
or some other algorithm.

Check out http://www.mindcontrol.org/~hplus/nat-punch.html for a nicer =
explanation of the issues.