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Questions tagged [caa]

A Certification Authority Authorization (CAA) is a DNS record that limits what Certificate Authorities that may issue certificates for the domain in question.

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How can I test in my device checks DNS CAA correctly and rejects TLS certificates that are signed by an unauthorized CA?

I would like to know how I can test if my devices, or browsers1 checks and applies DNS Certification Authority Authorization (CAA) correctly. And if it does not, how I can enable it and enforce CAA to ...
Bob Ortiz's user avatar
  • 6,665
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Someone issued fake CAA records for my domain. What is the most important thing to do to resolve it?

First, I can update this with the affected domain, if it's critical, but for obvious reasons I'd like not to be the target of more problems. Someone registered some CAA records for my domain. I have ...
New Alexandria's user avatar
1 vote
1 answer

Are problems expected when a subdomain CNAME target has no CAA record?

Consider the following DNS setup of A # this is for CAA 0 issue "" www CNAME ghs....
bers's user avatar
  • 240
3 votes
1 answer

What is the purpose of the critical flag being enabled (128) on a CAA IODEF record?

CAA, or Certificate Authority Authorization, provides a way to designate which CAs are allowed to create a Certificate for specific domains. This is done accomplished by publishing new caa DNS records,...
Eddie's user avatar
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1 vote
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Detecting a web based MITM attack?

I've been looking into ways to detect a Man In the Middle attack, when the client has "duped" into trusting third party CA. Examples of this are, anti-virus applications and corporate ...
Paul's user avatar
  • 11
2 votes
1 answer

Does a CAA record on a local hostname in a LAN offer additional security?

A CAA DNS record limits the certificate authorities that may issue a certificate for a domain and its subdomains. Do CAA records make sense in a LAN environment? Assume internal hostnames such as ldap....
Sjoerd's user avatar
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