DNS Response Policy Zones (RPZ)

Document Type Replaced Internet-Draft (individual)
Authors Paul Vixie  , Vernon Schryver 
Last updated 2021-07-09 (latest revision 2017-03-09)
Replaces draft-vixie-dns-rpz
Replaced by draft-vixie-dnsop-dns-rpz
Stream (None)
Intended RFC status Informational
Expired & archived
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Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-vixie-dnsop-dns-rpz
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes a method for expressing DNS response policy inside a specially constructed DNS zone, and for recursive name servers to use such policy to return modified results to DNS clients. The modified DNS results can stop access to selected HTTP servers, redirect users to "walled gardens", block objectionable email, and otherwise defend against attack. These "DNS Firewalls" are widely used in fighting Internet crime and abuse.


Paul Vixie (paul@redbarn.org)
Vernon Schryver (vjs@rhyolite.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)