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.
Whitelist against the mac id? Sounds like a lot of work though, adding new devices etc.
Maybe look into a lockable network cabinet that you could put the DVR in. This would add a layer of physical security instead of diving into network security. For added security, run the network cable in conduit to prevent someone from cutting the cable outside the cabinet.
Right. That’s different, it originally read as if the port was hanging off the side of your house.
What you need is a managed switch, firewall and vlans. Segregate the NVR and Cameras to a separate network, the port to the camera in the garage on the switch gets configured to the secured VLAN. Even if an unmanaged switch connects it’ll be stuck in that vlan. A good switch will also detect that switch connection and shut it down.
And then only allow specific devices on your “internet” vlan contact the NVR. This will stop anyone connecting to that port and accessing other parts of the network.
Thanks, I think I understand now. Any idea of the cheapest kind of switch that will do this?
Switch - look at a second hand Cisco 3560e or x. You could even go one of the C3560CG-8PC 8 port switches if you can’t go a full rack mount option.
Router / firewall you could use a second hand mikrotik 750 or 951