Leaving the access unauthorised surely creates a security hole? Say a laptop from home running an OS like XP Home or Vista Home or any others that GP won't apply to comes into school and is plugged into the network. Its very easy to get your hands on the proxy settings, so a user can access the Internet without any authentication. One proxy site later and you could have a load of sniffers and hacking tools on your network with no accountability or tracking of who was the offender.
I know its all ifs and buts, i'm just looking at possibilities. Can anyone shed any more light on any other security issues regarding unauthorised access to the Internet?
