PiHole Docker Ubuntu 22.04 Not Blackholing all ads

[jwmoss]

Expected Behaviour:

I have pi-hole installed on Ubuntu 22.04, which has a static IP address as 192.168.1.9. Setting DNS to only 192.168.1.9 in my DHCP options works great, but when I set it to 192.168.1.9, 1.1.1.1, and 8.8.8.8, pi-hole does not block any ads. DHCP is setup on my Ubuiquiti UDM Pro.

Actual Behavior

No ads are blocked, able to re-produce on iOS 16.5.1, Firefox Desktop (Secure DNS off) on macOS 13.4.1, and others.

Link to docker compose, netplan, and systemd on Ubuntu 22.04 hardware hosting pihole

Debug Token:

tricorder link

[jfb]

@jwmoss

Setting DNS to only 192.168.1.9 in my DHCP options works great, but when I set it to 192.168.1.9, 1.1.1.1, and 8.8.8.8, pi-hole does not block any ads

This is the expected behavior. Pi-hole should be your only DNS server.

If you provide alternate DNS servers to clients, they are free to use any of them at any time, with the result that some of your DNS traffic will bypass Pi-hole.

Why should Pi-hole be my only DNS server?

Reduced Ad Blocking Capability The main reason you should Pi-hole as your only DNS server is that you will see increased performance in the blocking of ads. If you have two DNS servers (Pi-hole and something else), your network clients may not always query Pi-hole for name resolution. If a query happens to be answered from a non-Pi-hole DNS server, your block lists will not apply (since that DNS server doesn't know about them). All Queries Need To Go Through Pi-hole First Since other DNS se…

[jwmoss]

Okay sounds great! I'll setup a 2nd pi-hole server. Thanks for the quick reply.