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this post was submitted on 27 Oct 2026
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I redirect all out going dns requests to my self hosted DNS server.
Only one I can't block is DoH. DoT is easily blocked and my firewall picks up on it.
Could you block DoH entirely on the network level and cause it to fallback? I guess you'd have to have a list of common DoH IP addresses to block.
You have the destination IP to work with, thats it. Otherwise it just looks like any other HTTPS traffic.
I guess if you uplpaded your own root CA cert tgen you could man-in-the-middle for deeper packet inspection.
Or, i guess, try using eMudhra's compromised private keys and hope the clients havent been updated yet