Do I need to setup Certificate Authority Authorization Rule?

Do I need to setup Certificate Authority Authorization Rule, when we are already using cloudflare https?

That would be a DNS record. I suggest you check DNSChecker.org for CAA records in your domain. If none show, then you don’t need to do anything.

However, I always use them for additional protection. Mostly just a CAA mailto: record, then Cloudflare will add the rest that they use. But you’ll need to make sure that the CA that your web host is shows up in the CAA record list at DNSChecker.

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