AWS Certificate Manager (ACM)
ACM handles the complexity of creating, storing, and renewing public and private SSL/TLS X.509 certificates and keys that protect your AWS websites and applications.
You can provide certificates for your integrated AWS services either by issuing them directly with ACM or by importing third-party certificates into the ACM management system.
ACM certificates can secure singular domain names, multiple specific domain names, wildcard domains, or combinations of these.
ACM wildcard certificates can protect an unlimited number of subdomains.
You can also export ACM certificates signed by ACM Private CA for use anywhere in your internal PKI.
You can optionally configure a Certification Authority Authorization (CAA) DNS record to specify that ACM is allowed to issue a certificate for your domain or subdomain. After it validates your domain, ACM checks for the presence of CAA records to make sure it can issue a certificate for you. You can choose to not configure a CAA record for your domain or leave the record blank if you do not want to enable CAA checking.
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