How do I find ports for an online game?

I am trying to make Ghost Online not lag in PvP...but...I need to know the ports....Is there a program that can help me find ports? Or something...When I try the "Open CMD and type in Netstat" well, when I try that...5 things come up...and there is a column that says IPaddress or something...and then to the right of it there is one that says "Foreign IP's" And I don't know what to forward...or if those are even the right ports...
But, is there a program that can do it? Or maybe you already know the ports of Ghost Online...but I would rather try to figure it out...because I can figure out ports on other games...


I guess...No one has any idea...huh....uhg.