router/modem help, PLEASE

[RPNbaritoneOSU]

I have a network set up in my house through a router that is then connected to a DSL modem. My sons would like to play a game over the internet on a particular sever together, but they cannot because they are using the same IP address to connect to the internet. Is there a way to change the way IP addresses are sent out through the router and/or modem so that each individual computer has its own IP address on the internet??

Thanks for all your help you may bring, any suggestions are welcome. Happy Holidays as well!!!

 

[guardgirl]

you need to NAT, you give your router the primary address that you receive from your provider and then use internal IPs for your computers. I know w/my provider you have to also make the router have the MAC address too. I use a linksys router for that.