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I didn't want or need the cloud and I wanted constant recording. They have been working fine with that minimal amount of internet access, but curiously, the firewall logs show frequent blocked connections to Reolink IPs on port I have been using Neolink on my PI4 to send 4 camera streams to Frigate. If the crap security on these cheap cams is a concern, one thing that is pretty easy to do if you buy a "managed switch" or similar is put the crappy cheap IP cams on their own private VLAN with no internet access, firewalled from all the other VLANs on your home LAN, perhaps with a few exceptions for NVRs or devices who view the feed locally at home. I had to open up that port as well as allow them to make DNS lookups on my router.