Hi there, I've read about Android 10 using Google DNS if only one DNS is specified with static or dhcp config.

My router is promoting 3 dns servers with dhcp now (2 times pihole and 1 time router, which has pihole as upstream dns set).

My setup worked since using pihole (years) until my new phone updated to Android 10.

No matter what I try, it somehow is able to bypass pihole (seeing ads in apps, etc).

My router sadly has no firewall, so I can't block with iptables :-(

I'm running pihole in docker combined with cloudflared docker to provide DoH. As said all devices work well with this setup and block ads as they should.

I got it manged so that even dnsleaktest.com is giving back cloudflared only on the phone, but I still have ads in apps which weren't there before. It even happened that my phone established a mobile connection while on wifi as it wasn't able to reach dns. So it seems it's trying all it can to resolve dns it likes to resolve.

Anyone with any idea in how to solve this?