this post was submitted on 04 Feb 2024
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I have an asus router with a pi-hole on the network.

I was doing some work on my server and noticed that when pi-hole was down, I couldn't access the internet. I was looking for some ideas online how to deal with this, but they said to have a second pihole on the network in case one is offline. Is that the only way to do it? Is there any way to have the network go back to normal if the pihole is offline?

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[–] elDalvini@discuss.tchncs.de 5 points 5 months ago (4 children)

I have my pi-hole setup as the upstream DNS in my router, with cloudflare as a secondary DNS. That way, all my devices always use the router for DNS (since that's what is advertised in my DHCP) and the router then uses pi-hole if it's available, or cloudflare if it isn't. But the individual device doesn't get to choose between different servers.

[–] taladar@sh.itjust.works 8 points 5 months ago (2 children)

The vast majority of devices that allow setting multiple DNS servers do not strictly prioritise one over the other even if they label it as primary and secondary.

[–] elDalvini@discuss.tchncs.de 2 points 5 months ago (1 children)

That's why I don't let every device decide individually. I know my router (FritzBox) prioritizes the pi-hole (it's even called "preferred" and "alternative" DNS-Server in the UI)

[–] taladar@sh.itjust.works 1 points 5 months ago

Those labels are quite common too with systems that do not prioritize one over the other.

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