I have two Windows 2003 SP1 domain controllers running DNS. They are both setup to forward DNS queries to a Linux box in the DMZ, and then failing that to go direct to our ISPs DNS ...

I'm running PiHole at home for ad-blocking, and I'm using Cloudflare as the upstream server. PiHole have a description here of how to add Unbound to the system as a recursive DNS resolver, with the ...