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Ulrich Berntien edited this page Sep 4, 2020 · 1 revision

TWA-0602

Message

"Domain doesn't specify any valid issuers"

Explanation

The twa script loads and parses the Certificate Authority Authorization (CAA) record from the Domain Name Server (DNS). A domain owner specifies in the CAA record which Certificate Authorities (CAs) are allowed to issue certificates containing the domain name.

Inside the CAA record an issue property specifies a Certificate Authority which is allowed to generate TLS certificates for the domain. More than one issue tag could be in a CAA record.

Here the twa script has not found an issue tag in the CAA record and printed the message TWA-0602.

At least one issue tag is needed to get an TLS certification.

Remediation

Correct the content of the CAA record. Specify the Certificate Authority which have generated the current TLS certification file.

The CAA Record Helper could be used to generate a correct CAA record.

See

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