Certification Authority Authorization (CAA) Validation for IP Addresses

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Last updated 2018-04-19 (latest revision 2017-09-13)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Certification Authority Authorization (CAA) RFC specifies a method for users to restrict which Certificate Authorities (CAs) are authorized to issue certificates for their DNS domain names. This document extends that specification to provide a method for holders of IP addresses to do the same.


Roland Shoemaker (roland@letsencrypt.org)

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