I work for a very large company that has many contractors that come in and out of the building. We are looking for a way to allow the contractors to come in with their laptops but to prevent them from plugging their laptop into any availible ethernet port. One of the suggestions was to find out if anyone out there makes a lock that you can slide into the Ethernet port on the laptop and lock it so that they can not plug a cable into it. Does anyone know if something like this does exist or not. Please help if possible.