this post was submitted on 27 Aug 2025
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Debian operating system
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Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian provides more than a pure OS: it comes with over 59000 packages, precompiled software bundled up in a nice format for easy installation on your machine.
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Maybe Firefox was configured for DoH. Then it wouldn't use the OSs DNS settings.
No, it wasn't that :/
The other thing that's strange is that it all queries are coming from the client pihole:
The pihole is installed on the same computer that it's supposed to be the DNS resolver for (no access to router). I followed the instructions to the tee when installing pihole + unbound from the pihole website, but for some reason it's not working. All queries get SERVFAIL :/