Linux Babe posted a tutorial about setting up your own BIND9 DNS Resolver on CentOS 8 or RHEL 8

Set Up Your Own BIND9 DNS Resolver on CentOS 8/RHEL 8

This tutorial will be showing you how to set up a local DNS resolver on CentOS 8/RHEL 8, with the widely-used BIND9 DNS software. There are many synonyms for DNS resolver, some of which are listed below. They all refer to the same thing.

full resolver (in contrast to stub resolver)
DNS recursor
recursive DNS server
recursive resolver

Also, be aware that A DNS server can also called a name server. Examples of DNS resolver are 8.8.8.8 (Google public DNS server) and 1.1.1.1 (Cloudflare public DNS server). The OS on your PC also has a resolver, although it’s called stub resolver due to its limited capability.

Set Up Your Own BIND9 DNS Resolver on CentOS 8/RHEL 8 - LinuxBabe