I know this is a very old topic, but I spotted this from sandman [on another topic] today :
Regarding the multiplayer-aspect a major problem was, that most of the participiants, including me, werent able to host a mp-game, although we checked port issues and other conditions which are considered vital to conduct MPs
When I was active, 2010 to 2014, I had no problems hosting or joining MP games, but I know other people did have problems, as above.
I never did anything "special" to my PC when hosting games with a 2008 built PC with windows XP and McAfee AV.........I just loaded the game and started a MP game for others to join, no problem at all.
Are people STILL having this "hosting" problem, and if so, what is the cause of it ?....is it to do with OS or AV software ?..........and of course how to resolve it ?.
I might be buying a new desktop PC later this year (with windows
10 installed I assume) and would not be pleased to find I could not host an HW MP game.