Cod 4 How to conect to a lan From my home
 

My friends play cod4 at a net cafe.How can I conent to the lan from my home?
How can they see lan ip of their server?
(i know how to conect to server with the ip adress)

You want to connect to the LAN of the net cafe from your home? Well, from the net cafe's point of view, that's outisde their LAN so, if they're not out of their mind, they'll protect their LAN with a firewall so you won't get inside. Ask the admin of the net cafe; I'm sure he (or she?) will tell you the same.