Wow, what would you need that for? To open all ports towards that connection? If so, set your computer as DMZ, then all ports are opened...but I have no idea why you should want what you ask for though...? enlighten me?
yea i fail to see why you would ever set something like that up, in addition a wan connection will never act like a lan connection as there will be a gateway involved. At the same time I can't see why you would need a wan to belive it is a lan.
Provide some more information on what your trying to accomplish and we can help you better.
The difference between LAN and WAN in this case is that a LAN is computers in the same subnet segment (192.168.0.* is common for a private LAN) whereas the WAN is connected through a gateway (router) so you can talk to computers outside the subnet (i.e. the rest of the world).
If the IP is not in the subnet range, it's not on the LAN.
Well as has been stated you insert hte CD key when you install the game for 1, and as Zedric and I have stated there is no way to make a wan think it is a lan because you will never be able to control the external subnet.
well, he could have a legit game, which i dont think so, but just wants to play at a lan party or somthing, cuz that will gaurentee speeds across the computers, depends on which game he wants to play, cuz some games have trainers/patches like that (not official, 3rd party)
Well I am sure that there are programs that would allow you to mask/spoof the IP adresses, but you have to have this software setup on both ends. But as this is probley getting to the point of warez and will start violating guidlines for the forum, I am going any futher on this, especially considering it is for the purpose of using illegal copies of a game to begin with.