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.
I crazy glue the cables into the cameras, but I’m willing to reterminate cables if I replace the cameras. I’d also note that a wired cable outside is susceptible to lightning strike, which can damage any other devices inside directly wired in. I isolate my cameras on a dedicated switch, and connect that via fiber. And use a surge protector. This lightning damage has happened to 2 family members.
I do also use Mac filtering, and for switches for this stuff I buy old Cisco 8 port 2960s off eBay for like 50 bucks.