this post was submitted on 12 Mar 2025
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How do you host your DNS sinkhole/resolver? (sh.itjust.works)
submitted 1 year ago* (last edited 1 year ago) by ohshit604@sh.itjust.works to c/selfhosted@lemmy.world
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Currently have nice long docker compose file that hosts my PiHole V6 container (along with a bunch of other containers) however, reason i ask this question is because whenever I go to pull an updated image and recreate the container I experience about 20 minutes of no DNS resolution which to my knowledge is due to the NTP clock being out of sync.

What’s the best way to host a DNS sinkhole/resolver that can mitigate this issue?

Was thinking of utilizing Proxmox & LXC but I suspect I’ll get the same experience.

~~Update: Turns out PiHole doesn’t support two instances, I got both of them on separate devices also set the 2nd DNS server in my routers WAN & LAN DNS settings which did in fact split DNS between both instances however, I lost access to my routers web-ui, my Traefik instance & reverse proxies died and I lost all internet access.~~

~~So, don’t do what I did.~~

Update 2: So everything I said in my first update let’s disregard that, turns out I had my router forcing all DNS to PiHole server 1 which caused my issues mentioned above.

Two servers appears to work!

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[–] AtariDump@lemmy.world 1 points 1 year ago (1 children)

When it comes to a “secondary”DNS... [there is nothing like a primary and secondary DNS server. These indications are quite misleading but many systems adopted it this way. Pihole only list the DNS servers as primary and secondary, because this is what the providers write on their pages. The bad phrasing is supported especially by how Windows handles it.](https://discourse.pi-hole.net/t/primary-vs-secondary-dns/1536/2)

[Most operating systems implement DNS servers as alternatives, not as fallbacks, i.e. they will query any of both servers from time to time, so it is quite likely that you will loose your Pi-hole filtering capabilities (at least partially) [if you specify a secondary DNS server on your network].](https://discourse.pi-hole.net/t/secondary-dns-server-for-dhcp/1874)

The **ONLY** DNS server you should have set on your network is a/the PiHole(s).

[–] tofu@lemmy.nocturnal.garden 3 points 1 year ago (1 children)

That's what I thought. Btw, your formatting seems to be broken.

[–] AtariDump@lemmy.world 2 points 1 year ago

Thanks for that; the formatting is broken.

I’ll try and figure out how to fix it (it was formatted for the “site that shall not be named”)