this post was submitted on 21 Jul 2026
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You can have local control over such things, and IOT devices should be locked down to only ever access via LAN anyways.
That still needs wifi access though. Internet access is a different story, I can't think of almost anything that needs internet access. Maybe security camera.
Is it easy to isolate a device to LAN only via router? I never figured out how to do it.
It can be “easy” depending on your definition of easy. For the average person, no, not easy. For a tech person, maybe, depending on their interests and proficiencies. Easiest is likely using a firewall on the router blocking all outbound and inbound WAN connections (for the MAC address associated with the device, assuming it doesn’t try to rotate MAC addresses or hop on any open WiFi networks around you). Some devices will straight refuse to work if you do this, however. So you have to do research and be careful about which products you buy.
If you want a vacuum, see the valetudo link I posted in another comment. It has some options for this that you can load local only custom firmware (and integrate it with home assistant).
That's the one you want to keep off the Internet the MOST!
The easiest thing is to have the InternetOfTrash devices with no configured route; just broadcast and that's it.