this post was submitted on 14 Feb 2026
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Hello

So I set up pihole on my new raspi, and when i set custom dns server (local address, 192.168.x.x) on mullvad, it stops resolving. It resolves for about 10-15 seconds, but then after that, it stops resolving.

The pihole works without mullvad, and mullvad works without custom dns being set up. I have tried on multiple machines (mac)

Anyone experienced this and anyone know of a fix?

I will probably get in contact with mullvad and see if they have any insight.

TIA

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[–] scott@lem.free.as 2 points 3 weeks ago

You will need to be more specific on your configuration for us to provide a more comprehensive response.

I have Pihole configured with Mullvad as the primary upstream DNS provider (albeit with DoH).

Just make sure you're using IP addresses for the upstream Mullvad DNS servers since you won't be able to resolve their names without first having DNS (i.e. chicken-egg).