A tutorial for setting up a local DNS resolver with Unbound on Ubuntu Linux 22.04 LTS was made available by Howtoforge.

How to Set Up Local DNS Resolver with Unbound on Ubuntu 22.04

Unbound is free and open-source DNS server software that can be used for validating, recursive, and caching DNS resolvers. It's a feature-rich DNS server that supports DNS-over-TLS (DoT), DNS-over-HTTPS (DoH), Query Name Minimisation, the Aggressive Use of DNSSEC-Validated Cache, and support for authority zones. Unbound is focused on the privacy and security of DNS, but without sacrificing the speed and performance.

How to Set Up Local DNS Resolver with Unbound on Ubuntu 22.04