GameRanger Proxy

[Ultimo]

Hey guys, me and some friends are trying to play LAN games in our Game Programming class, but we are on a locked internet connection that tries to block any gaming activities.
(The only reason we are playing games is because our teacher doesn't know what she's doing; We have this teacher because our old teacher moved to a different room and the current is from a basic-level computer introduction class.)

So, we downloaded GameRanger knowing we could use it for changing Proxy settings and connecting to the LAN, but we can't find any free HTTP or SOCKS proxies to use! Can you help, please?

Thanks!