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The Certification Authority Authorization (CAA)

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.

How to check a domain’s CAA record which is identified by a type257 DNS record:

$ dig +short -t TYPE257
\# 19 0005697373756573796D616E7465632E636F6D

For more information:

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