Which are the correct ports to use on the host machine, which is using XP Pro, Zone Alarm Pro and a Linksys Cable Modem/Router (model WRT54G). I have determined the IP address that the outside world sees and that is the address I am attempting to connect to with remote desktop. I don't know which are the correct ports to forward the router to in order to reach the specific machine that is the host on my LAN. I do know that machine's IP Address on the lan behind the router. I have logged in via my LAN an understand how the remote desktop works, but haven't been able to connect once I am remote and logging in from different ISP to my host. Any help would be greatly appreciated. I have been attempting to forward the requests that come to the router from my remote machine to a specific port (using the applications & gaming PORT RANGE FORWARD) feature on the console of the router. What is the correct port to use for remote desktop?