DNS over HTTPS - Wikipedia
https://en.wikipedia.org/wiki/DNS_over_HTTPSDNS over HTTPS (DoH) is a protocol for performing remote Domain Name System (DNS) resolution via the HTTPS protocol. A goal of the method is to increase user privacy and security by preventing eavesdropping and manipulation of DNS data by man-in-the-middle attacks by using the HTTPS protocol to encrypt the data between the DoH client and the DoH-based DNS resolver.
unbound - Pi-hole documentation
https://docs.pi-hole.net/guides/dns/unbound2 dager siden · Setting up Pi-hole as a recursive DNS server solution¶. We will use unbound, a secure open-source recursive DNS server primarily developed by NLnet Labs, VeriSign Inc., Nominet, and Kirei. The first thing you need to do is to install the recursive DNS resolver: sudo apt install unbound.