DNS Certification Authority Authorization (CAA) Resource Record

Document Type Replaced Internet-Draft (lamps WG)
Authors Phillip Hallam-Baker  , Rob Stradling  , Jacob Hoffman-Andrews 
Last updated 2018-03-10 (latest revision 2018-02-23)
Replaced by RFC 8659
Stream Internent Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state Adopted by a WG
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-lamps-rfc6844bis
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Certification Authority Authorization (CAA) DNS Resource Record allows a DNS domain name holder to specify one or more Certification Authorities (CAs) authorized to issue certificates for that domain. CAA Resource Records allow a public Certification Authority to implement additional controls to reduce the risk of unintended certificate mis-issue. This document defines the syntax of the CAA record and rules for processing CAA records by certificate issuers.


Phillip Hallam-Baker (philliph@comodo.com)
Rob Stradling (rob.stradling@comodo.com)
Jacob Hoffman-Andrews (jsha@letsencrypt.org)

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