Update: Ok so after trying a whole bunch of things I'm finally able to enter games other people start. However I am unable to start my own games (which I'm more or less ok with). This sadly means that I can't play the tutorial which is unfortunate, …
Ghosthree3: Yea, those were just two slip ups I made for the ports when posting, I used the correct port numbers when opening them and making exceptions in my firewall. Also using those commands gives no results, so the ports being in use already do…
As far as I know I don't have a second version of NS2 running (checked task manager, and looked through applications and processes, found no duplicates). I also have ports 20715 and 20716 …