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Cake day: August 20th, 2023

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  • Unless you are verifying DNSSEC, they could intercept any outgoing DNS queries and replace the response with whatever they want, if you are using DNSSEC they won’t be able to modify the responses since they can’t create the signatures, but they could still send queries to their own server instead of your chosen server. With either of these options they can still see what you query. DNS over TLS or HTTPS is a way to prevent all of these things, since with those you know the endpoint of your HTTPS connection is the actual server with the signed certificate and the connection is encrypted.

    Edit to add: it shouldn’t matter what DNS you use to look up the IP of the DoH/DoT server, because only the real servers should have the correct private key.