I am the network adminustrator for a school lab (not physically monitored 24/24). What we have seen in the past is that users come in, unplugged the lab systems, and plug in their own system (usually a laptop), enter a valid IP address, and start P2P applications, which we do not authorize.
I want to implement a simple mechanical locking/secure device that would prohibit the CAT5 patch cable to be unplugged from our system's NIC card and/or from the wall plate. In other terms, it would be impossible for an intruder to physically connect a CAT5 patch cable to his/her laptop.
Please provide name or links to manufacturer of such locking devices.