Knowing the port numbers will help you with nothing. If your port is blocked then you will have no connection at all. Game server remote port 7581. The local port varies , is a random selected free port on your computer. Like I said though, a port can either be open or closed, meaning connection or no connection at all. Ports have nothing to do with lag. @Messiah
Port have a lot to do with lag.. I'm not gonna explain all of it now but to put it simple, the flow of data is more clear when a port is open.. when a port is not open your modem / router "thinks" for a very short bit if to accept that packet or not, but when its open the packet flow is smooth with no stops. Nonetheless I've opened ports of PServers before and checked the delay using two laptops, and there was a very major decrease in delay (Jumped on one laptop, and seeing the character jump on the other screen too) Thanks for the port though!
go ahead and download cports then (or another port monitoring tool). It will show you what port your computer is connected to, and which ports are being used locally.