←back to thread

Power over Ethernet (PoE) basics and beyond

(www.edn.com)
257 points voxadam | 1 comments | 16 Oct 25 14:09 UTC | HN request time: 0.207s | source
Show context
skopje ◴[22 Oct 25 00:53 UTC] No.45663732[source]▶
PoE is awesome. My custom home security system is all CCTV PoE with a gstreamer backend running on four-core fanless linux box. Way to go. Complete control. No batteries, no wares spying on me, no personal data getting scraped by big guys. (Cloud connectivity sucks because I have segmented mp4s and jogging through them hurts but I only care for events after they happen, not while they happen.)
replies(6): >>45663770 #>>45664711 #>>45664915 #>>45665099 #>>45665193 #>>45667449 #
benhurmarcel ◴[22 Oct 25 11:21 UTC] No.45667449[source]▶
If one of those cameras is outside, did you consider the case of someone plugging in his laptop on that ethernet cable? He'd be on your local network.
replies(6): >>45667551 #>>45667567 #>>45667989 #>>45669412 #>>45671399 #>>45672136 #
1. nucleardog ◴[22 Oct 25 17:10 UTC] No.45672136[source]▶
I did. Implemented a "simple" solution (simple for anyone who is going to be setting up their own IP camera system and NVR):

Cameras are on their own VLAN. Port isolation is enabled so they can't connect to each other. Only connectivity allowed to/from that VLAN is from the cameras to the router for NTP, and from the NVR to the cameras.

So if you plug in you can... check the current time on my router. Maybe see how many other cameras are on that segment? Likely not going to get very far given you're already caught on camera, an alert's been fired, and pretty soon I'm going to be making a call to the police.