Please follow the below template, it will help us to help you! Expected Behaviour: Pi-Hole should be "working", seeing and blocking all queries on my network as I set on the router level the Pi's IP address and it has been working great for a year but randomly stopped working in the last couple days…

Your debug log is normal. But, your DHCP server (the router) is not passing the IP of Pi-hole as DNS server. It is providing its own IP. *** [ DIAGNOSING ]: Discovering active DHCP servers (takes 10 seconds) Scanning all your interfaces for DHCP servers Timeout: 10 seconds * Received …

So does that mean that the router is not set to use pi-hole as it's DNS? I have it set to use that IP as my DNS and then 8.8.8.8 as secondary. I did just have some Google ads blocked that then worked as soon as I disabled pi-hole but it did not register anything still.

All of a sudden Pi-Hole is now showing all the data on the dashboard / working normally. Not sure what changed, I didn't make any changes outside of disabling pi-hole a few times to load a couple pages

Ah ok, that's kind of silly. Now I need to figure out a failover, I see I can setup another pi-hole but I don't have another Pi to do that with at the moment

[image] TheReader: Now I need to figure out a failover Why? Are you having reliability problems with the Pi?

No but I don't trust it to work perfectly, I've taken measures to help the reliability of the Pi by moving from an SD Card to a SSD but I just want to be prepared incase it does have an issue.

Note that the Pi isn't the only single failure device on your network. You have one modem, likely one router, etc. You will likely find it quite reliable, particularly if it doesn't lose power. You also have the option of running Pi-hole on devices other than a Pi. You can use a VM or Docker on …

I totally understand, just before I moved to an m.2 I had many SD cards fail so in my mind its the most failure prone device next to my QNAP devices. I removed the additional DNS entry after my last reply and just now for 30 seconds or I could not browse, definitely DNS related. As soon as I signed…

Happened again just now on a computer I just spun up for testing, connected to wifi but wouldn't load any webpages. Opened a new tab, signed into the pi-hole dashboard and the webpage I was trying to access loaded just fine

Pi-Hole shows no queries or clients in dashboard and seeing ads again

Help

jfb December 7, 2021, 7:25pm 5

There is no reliable concept of primary and secondary when it comes to DNS servers. Given multiple DNS servers available, clients are free to use any of them at any time.