Help Network configuration

Hi to all
I have a little problem. I'm testing a game that should run in multiplayer over the internet. Of course it doesn't run...some bug I though.
On local (with Apache running) the game plays ok, when tested with other human (via internet) their client doesn't connect.
I'm running the server-game on a computer connected to internet via a router. I think the problem is in the firewall/router configuration, but I need an hand.
thanks in advance!!!

sounds like you need to forward the port.

http://www.portforward.com/routers.htm

Ok, thanks, I will check this

Hey, I'm having that exact router bother lately, too!

Yah, you need to forward a port(s) to the right computer.
Then the computers outside the network can be accessing a particular port on the router's IP, which will get them a particular computer on the network.

After that, you may still get some problems...
I have an apache2 test server set up which I have been trying to access from elsewhere for a while now to no avail.
My router cannot be pinged (let alone connected to - it all times out) with any computer that isn't connected to it, and I can't find an option anywhere except disabling the firewall which doesn't change anything. (And, since it's a Linksys WRT54G version 5, my hopes seem pretty slim).

Anyway, to test the setup yourself, you could try setting up a quick web server with Apache and accessing it through a site like http://anonymouse.org/ or www.tiffman.com/bork.cgi

Edit:
Followed ckob's guide and forwarded port 443, too, but still nothing :(