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How to block a network device from "phoning home"? (alien.top)

submitted 11 months ago by Bluepenguin053@alien.top to c/homelab@selfhosted.forum

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Howdy,

I'm going to apologize in advance if this is a simple question, but my google-fu is not getting me results.

I have a 3D printer. This printer allows me to connect it to my local network so my PC can send it files. I can see it attempting to communicate out to the internet via my PIhole however. How can I block it from attempting to reach out but still allow it to connect to my PC?

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[–] dorsanty@alien.top 1 points 11 months ago (2 children)

Very few services would set themselves up this way. Putting IPs into device firmware/software limit the ability for the companies to change without rolling out updates and tracking adoption, etc.

I’d be curious to know if any common or popular devices are known to use IPs to phone home.

[–] Adenn76@alien.top 1 points 11 months ago

Agreed.

Also, if you are running PiHole, HOPEFULLY you are also running a firewall. You should be able to easily block the IP address and / or domain at that level as well.

Of course the other option, as others have mentioned, is to get rid of the default gateway so it can't access the Internet to begin with.

[–] reddit-MT@alien.top 1 points 11 months ago

MS Windows uses IP addresses for some things, last I checked.