will this work on leapord?
First what you do is Open up Airport Utility, Then click in the menu "File" and go down to "Configure Other"Then this menu will pop upEnter into it your routers LAN IP address (for most it is 10.0.1.1) and your WPA Password (another menu will pop up and you have to enter it again) ^Then Click the Button that says advanced, and another menu will pop upClick Port Mapping and then the "+" symbolAdd what I have here and then add your LAN IP Address (Not WAN)After that click the "Continue" button and let your airport restart, After that is done you should be able to host.Now, don't host horrible servers.this is how to port forward on a mac.
Yes this will work on leopard and to find the IP address just open up network preferences and look at which IP your computer is using.
Enter into it your routers LAN IP address (for most it is 10.0.1.1) and your WPA Password (another menu will pop up and you have to enter it again)