Domain Name Service Response Policy Zones ( DNS RPZ ) is a method that allows a nameserver administrator to overlay custom information on top of the global DNS to provide alternate responses to queries. It is currently implemented in the ISC BIND nameserver (9.8 or later). Another generic name for the DNS RPZ functionality is "DNS firewall".
The prime motivation for creating this feature was to protect users from badness on the Internet related to known-malicious global identifiers such as host names, domain names, IP addresses, or nameservers. Criminals tend to keep using the same identifiers until they are taken away from them. Unfortunately, the Internet security industry's ability to take down criminal infrastructure at domain registries, hosting providers or ISPs is not timely enough to be effective. Using RPZ, a network or DNS administrator can implement their own protection policies base based on reputation feeds from security service providers on a near-real-time basis.
If one knows a bad host name or domain name, one can block clients from accessing it or redirect them to a walled garden.
If one know a bad IP address or sub net, one can block clients from accessing host names that reference it.
If one knows a name server that doesn't host anything except bad domains, one can block clients from accessing DNS information hosted by those nameservers.
content from https://dnsrpz.info/