Listening on the wild card address "0.0.0.0" is the same as listening on all interfaces (0.0.0.0 is a standard address known by the operating system). In nearly all cases that is what you want (I know a few exceptions like X, SSH, DNS and SQL-servers).
Ah ok, thank's sago for the info
I didn't think Quake3 was able to use this address, and I was pretty sure that it automatically detected the right address at launching (I can remember GTV doing this, but maybe now with ioquake3 things are different). Anyway this is very useful, in fact this is the only I have found to make an OA server, on a Windows computer, and behind a LAN, being seen on the Internet listing. Very useful.
i am going to try and put all this data together so others may know how to use hamchi or other VPN solutions
Please post it on the wiki if you want!
Just a question guys: why do you use Hamachi when you can use passwords to privatize a server?