Hot answers tagged gaming
Starcraft2 doesn't use real P2P communication between clients - all multiplayer network data gets routed via the Blizzard servers. So you simply need to add rules prioritising traffic to/from the Blizzard servers. Note that the blizzard server used will depend on your geographical region. Alternately you could find out which port SC2 uses to send/receive ...
I'm surprised you care to be honest, it's a game, that might be slower than the students wish - shouldn't they be studying etc? To me this is a policy, not technical, issue.
Similar to what the previous poster said, you could use AutoIT to create an exe that when ran, it pops up a message pox and asks for the path to the exe which then runs it using Run as, the password then wouldn't be stored in plain text it'd be within a complied exe, although i've no idea how easy it is to get out of there, but easier than a vbscript anyway. ...
The solution should be transparent to the user (remember this will be kids using it). I don't think they should need a lesson on how to type out a path for an exe in order to play a game. You may want to look into what JScott suggested. Finding out how to run those games under a limited account will likely be the best way to prevent further installs. ...
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