I know it's been asked hundreds of times, but couldn't find the answer I was looking for.
Well, I CAN host a server, it is connected to the Master Server, beacuse it notifys me of PB's, I can also type /1 .. /2 .. /3 and shows me my won races, 2nd position, etc.

But when someone wants to join, it doesn't allow them .. in "Network Debug" mode, it tells me a player wants to connect, but for the player trying to connect, it just sais "Connect Timed Out". I know it must be a port issue, so if anyone knows the specific port to open, please let me know.

Thanks
Dan

You didn't search very well.
http://www.lfsforum.net/showthread.php?t=9572

that^ helped me with loads of frustration, thanks angry angel

Can't find the problem I had..?

Look at the section on firewalls and port forwarding / home routers.