I wish to limit my office PCs to within the local LAN I set up. So, I've set the router to restrict internet access from these PCs.
Basically, the idea is to prevent users from uploading confidential company information to the internet.
Since it's possible for a user to plug in his own 3G router into the office PC's ethernet port, the security could be compromised.
So, is it possible to bind an ethernet port (or network adapter) to connect only to specific routers? Or even just a specific MAC address (which should be enough)?
Assume that the office PC is running Windows 7.