DNS resolution failure after power outage

Help
1

I pi.hole running as a service on a raspberry pi. I worked fine for years (5?)

I have 3 VLANs all using the same pi.hole for DNS resolution.
All clients get the DNS server address together with their IP address from the DHCP server.

Expected Behaviour:

Since pihole 6, I have to enable “permit all origins” for DNS to work.
I can live with that, but I would prefer a list of network ranges if that were available.

Settings > DNS > “Interface settings“ option should stay on “Permit all origins”!

Actual Behaviour:

after power fail the “Interface settings“ option changes to “Bind only to interface”!
I had this already twice…

Is this a bug?

Debug Token:

Your debug token is: https://tricorder.pi-hole.net/VLuJTg84/

2

With Pi's, always check for power brownouts in the systemd journals with below:

sudo journalctl --full --no-hostname --pager-end --grep voltage

Or if it says --grep isnt compiled:

sudo journalctl --full --no-hostname | grep -i voltage

If above returns voltage messages, have a read below:

https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#power-supply-warnings

3

I executed the journalctl command.
No “voltage” found…

Still, how can a setting change?