It’s an ethernet wire that’s going to be exiting my house and running to a camera in a publicly accessible space. An attacker could disconnect the camera, connect a laptop and access my network. How could I protect against that (other than a physical lock)? I basically want to lock down that cable to the point where nothing works on it unless it’s the intended camera. If this was wireless, I’d just use MAC filtering, but I don’t see an equivalent for wired connections.
It’s actually a DVR connected to 6 cameras, but the DVR physically resides in a neighbor’s garage (long story). I’m concerned someone in the neighbor’s garage could potentially disconnect the cable, plug in an unmanaged switch and put the DVR in the switch, then use my internet connection for potentially illegal activity - so I want to make sure that only the DVR can actually access my network from the wire and absolutely nothing else.