Unbound & Pihole

I was browsing around in settings - DNS, and noticed that no DNS servers are defined - only a custom one, I don't believe that I set it to this. Would an update have modified this? I am not familiar with unbound.

No, the only way this can be there is when you either

  • put it in there manually,
  • edited /etc/pihole/setupVars.conf and put in here, or
  • ran some command that did this.

Do you run unbound? What is listening on this port? Maybe you tried something else like DNS-over-HTTPS (DoH), or DNS-over-TLS (DoT) or something else which is at this address.

Please post the token generated by

pihole -d

or do it through the Web interface:

Tools > Generate Debug Log

I see where you appeared to have following a guide to install 'unbound' in the past per a prior discussion here: https://discourse.pi-hole.net/t/flow-of-dns-traffic/12224. That was in 2018. Maybe you just forgot about it.