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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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What is Debian missing to install pihole? (feddit.nl)

submitted 1 month ago by fort_burp@feddit.nl to c/debian@lemmy.ml

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I've installed it on Ubuntu and Raspberry Pi but when I went to my friend's house today to install it on his Debian 12 laptop I couldn't get it to work. It might have just been general networking problems but is Debian shipped without a package that's needed for pihole?

The result of my attempt was strange- dig showed the computer was using 127.0.0.1#53 for DNS resolver, the pihole dashboard in the browser showed the queries, but Firefox kept saying it can't find the page. It was kind of embarrassing since I talked up pihole a lot and couldn't get it to work lol.

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[–] bjoern_tantau@swg-empire.de 5 points 1 month ago (2 children)

Maybe Firefox was configured for DoH. Then it wouldn't use the OSs DNS settings.

[–] fort_burp@feddit.nl 3 points 1 month ago

Oh yea, excellent point. I'll have to check that out next time, thanks.

[–] fort_burp@feddit.nl 2 points 1 month ago

No, it wasn't that :/

The other thing that's strange is that it all queries are coming from the client pihole:

Client:  pi.hole <local IP address>

Query Status:  Forwarded, reply from 127.0.0.1#5335

Reply:  SERVFAIL

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 :/

[–] UnpledgedCatnapTipper@piefed.blahaj.zone 2 points 1 month ago (1 children)

Does the system have a firewall enabled that is blocking the traffic?

Did the dig result actually return an ip address for the dns query you tried?

Are you able to ping things on the internet from the terminal by IP and hostname (i.e. 8.8.8.8 and google.com)?

[–] fort_burp@feddit.nl 2 points 1 month ago

Yes! It has a firewall! :D

Turning it off yielded the same results :(

Ping works only by IP address. Pinging a hostname gives me Temporary failure in name resolution

Dig gives me SERVFAIL but at least it's using the right DNS resolver (the pihole installed on the same computer)

;; SERVER: 192.168.1.102#53(192.168.1.102) (UDP)

and pihole.log is full of

query[A] github.com from 192.168.1.102
2025-08-xxx forwarded github.com to 127.0.0.1#5335
2025-08-xxx forwarded github.com to 127.0.0.1#5335
2025-08-xxx reply error is SERVFAIL

Trying to update gravity on the pihole browser dashboard (which at least works) gives me

try to update gravity

  [✗] DNS resolution is currently unavailable
  [i] Waiting up to 120 seconds for DNS resolution............

But I wonder what it means that all queries are coming from a client named pihole. On other installations it just shows the client as their local IP address.

Client:  pi.hole 192.168.1.102
Query Status:  Forwarded, reply from 127.0.0.1#5335
Reply:  SERVFAIL

Thanks for your help!