"DNS server failure" after v6 update

[letaage]

Expected Behaviour:

No "DNS server failure"
Hardware: Raspberry Pi 3 Model A Plus Rev 1.0
I am running pihole v6 on a Raspberry Pi over a wireless network, just updated OS prior to running pihole -up

$ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
NAME="Debian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
VERSION_CODENAME=bullseye
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

Actual Behaviour:

After updating from pihole v5 to v6 by running pihole -up, the dashboard shows "DNS server failure" in red in the top corner, similar to what is shown in this topic:

Pi-hole v6 "DNS server failure"

I just upgraded to Pi-hole v6, hooray! Alas: [image] The web UI led me to sudo pihole -d, which spit out lots of output, and this: Your debug token is: https://tricorder.pi-hole.net/ubxnGTCf/ Hopefully someone can help me? Edit: Since the error is called "DNS Server failure", I assume it might have something to do with my unbound setup...? But it doesn't look like my configuration is wrong? [image] erik@MinipcLG2:~$ cat /etc/unbound/unbound.conf.d/pi-hole.conf server: …

However unlike the previous topic, I only run pihole on the Raspberry Pi, I have never installed a VM on it.
Running pihole -d does not show anything on port 53

$sudo ss -tulpn sport = 53
Netid  State  Recv-Q  Send-Q   Local Address:Port   Peer Address:Port  Process

I have tried rebooting and sudo pihole repair, but the problem persists and it doesn't seem to be servicing any DNS requests.

nslookup google.com 192.168.0.241
;; connection timed out; no servers could be reached

It is the 2nd pihole on my network (used as a backup), I have yet to update the other primary pihole v5 running in Docker on my NAS, that is still working fine:

nslookup google.com 192.168.0.240
Server:		192.168.0.240
Address:	192.168.0.240#53

google.com	canonical name = forcesafesearch.google.com.
Name:	forcesafesearch.google.com
Address: 216.239.38.120
Name:	forcesafesearch.google.com
Address: 2001:4860:4802:32::78

Debug Token:

https://tricorder.pi-hole.net/ONjlij7G/

[letaage]

I have worked out what the problem was and fixed it after I found the pihole.log file under the tools menu.

dnsmasq was not starting because of bad dhcp-host data imported from my v5 settings.

After I corrected the problems in /etc/pihole/pihole.toml it started working properly.

There were 2 problems lines in the dhcp-hosts:

1. dhcp-host=11:22:33:44:55:66,192.168.0.12,TV--Samsung-The-Frame--32

The log file showed it was complaining that the host name TV--Samsung-The-Frame--32 was invalid. I am not sure what was wrong with it, it didn't cause a problem with my v5 set up, perhaps it is too long?

2. dhcp-host=AA-BB-CC-DD-EE-FF,192.168.0.29,repeaterfront

The log file showed an error on this line, the obvious problem was the use of '-' as a separator in the MAC address rather than ':'. This was also directly copied over from my v5 setup.

Fixing these 2 problems got it working.

Funny that the v5 set up never complained about these problems...