With some details left behind, is there some kind of program that will block off wireless internet users on my command? For example, lets say I have two computers, 1 has a connection of Modem>Broadband Router>Computer, all connections through wires. 2nd computer is just connected to the internet through the router.
Are there any programs, like a firewall, that I can disable the access of the internet for the 2nd computer? I tried searching but there was stuff about WPA and things like that which I did not quite understand.
Thanks!