How to block an mmorpg game from internet connection?

There is an mmorpg game, which needs not to be installed. Of course it needs account name and password to play.

But I want to to disconnect this application from internet when someone launches it (I do not want to delete the files).

To play this game, we need a server (from the game server), how about blocking this connection?

Thank u.How to block an mmorpg game from internet connection?
You can use firewall to block this game connectionHow to block an mmorpg game from internet connection?
if you have a firewall or a router than you can go to the manufacturer's website and see what ports are needed inorder to play the game once you find out what ports are needed (all things that go online need to go through a specific port, if you can't find it just call them) than go to your firewall and block those ports