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How do you prevent IoT (internet devices/appliances) from connecting to the internet once you've initially configured them? (lemmy.world)

submitted 3 days ago* (last edited 3 days ago) by cheese_greater@lemmy.world to c/nostupidquestions@lemmy.ca

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A lot of devices require internet for st least one time to set them up.

How can I set them up such that as soon as I've programmed them/set their schedule, I can deny them access and prevent them from being chatty back with the mothership?

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[–] TerdFerguson@lemmy.ca 1 points 3 days ago* (last edited 3 days ago) (1 children)

Lots of good suggestions.

The simplest answer assumes you have a router with a firewall that you can configure.

The basic idea is a deny rule targeting the ‘source’ IP address from reaching the ‘destination’ ip addresses.

There are various ways to do this, the best way will be very precise. Some folks have said separate VLAN, very good practice but not required. Some folks suggest pihole, thats really hit or miss unless you know your device relies explicitly on DNS and you also know how to manage that.

It will be easies for you to learn the basic traffic policy before proceeding to other more advanced suggestions, but you will have to probably at least learn that bit of network security to attempt this task. Low difficulty in the grand scheme of things networky.

[–] cheese_greater@lemmy.world 1 points 3 days ago (1 children)

Look, do i need to buy some seperate doohickey or can this sort of business be usually dealt wirh it theu rhe routers portal wheee you type in your IP address in the browser or something?

[–] TerdFerguson@lemmy.ca 1 points 3 days ago

Yeah most routers will allow you to configure the traffic policy through their admin console. Some of the ISPs equipment won't, if that's all you're using.