[Cutless]

So I have been playing urban terror for years:
But recently We have restricted the amount of ports from our router, I can no longer play online nor' host LAN servers (or join them)

I am logged in with my auth key and everything

1. What ports are req to play

2. What is making my PC crash?;
Every time I create a LAN server the game freezes on the frame of me hitting the button, and then my PC shits itself.

I am using urban terror 4.3
and i'm on Ubuntu 14.??

I am a huge fan of this game and have been playing since I was like 9ish
and now I can't play

Something else of note, is when I put the files on a thumb drive and used it on a windows laptop, I could host LAN servers, but this laptop could not connect (and yes, I have re-installed UrT)