How do you define “no posability of internet acess at all?”

• Is networked to a central router that has blocked the devices in software fine?
• Is having network ports but being unplugged fine?

Or do really mean you want CCTV to a local recorder with no cat ports and no WiFi cards at all so that you can’t physically connect the cameras to the internet even if you wanted to?

I have several poe reolinks that connect to an NVR which is plugged into my router and blocked from accessing the wider internet. I can use the app just fine at home, but nothing is escaping to the broader web. One could unplug the NVR from the router, thus removing the possibility of leaking to the internet at the expense of needing to use the physical HDMI and USB port when investigating incidents.

Dude literally watched Squid Game and said that shit would be better if it were real then set out and did it.