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submitted 1 day ago by [email protected] to c/[email protected]

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[–] [email protected] 22 points 15 hours ago* (last edited 15 hours ago) (1 children)

Block all port 53 traffic from your network outside of your DNS server/pihole itself.
Block all known DoH servers.

If you want to get REALLY fancy you can write a NAT rule that will force any outgoing request on port 53 to route to your dns/pihole.

I do all of this. It's actually funny to see the requests that were hardcoded to go somewhere. Giant fuck you to those companies.

[–] [email protected] 0 points 1 hour ago (1 children)

Do DoH requests go though 443?

[–] [email protected] 2 points 1 hour ago

Yes. But there are lists of well known IPs that are serving DoH. So you can just block those. Obviously blocking 443 is not a good idea.