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    • Server name protected by the SSL certificate

      • The Common Name (AKA CN) represents the server name protected by the SSL certificate. The certificate is valid only if the request hostname matches the certificate common name. Most web browsers display a warning message when connecting to an address that does not match the common name in the certificate.
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  1. The common name is the server name protected by the SSL certificate. It must match the host name of the server where the certificate is installed. Learn how to format the common name, the difference with the subject alternative name, and the consequences of a host name mismatch.

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  3. Nov 1, 2023 · Common Name (CN) is the value within a Distinguished Name (DN) that identifies a domain or an organization. Learn how to use CN for SSL certificates, code signing, and wildcard TLS/SSL certificates.

  4. May 23, 2014 · The Common Name is typically composed of Host + Domain Name and will look like www.yoursite.com or yoursite.com. SSL Server Certificates are specific to the Common Name that they have been issued to at the Host level.

  5. Jan 29, 2024 · In this tutorial, we’ll learn about the common name and subject alternative name attributes in the X.509 certificate. Besides that, we’ll demonstrate the method for extracting those fields using the openssl command-line tool.

  6. Sep 5, 2023 · Learn how the common name field in an SSL certificate verifies the domain ownership and protects your website from security threats. Find out how to choose the right common name, configure it, and avoid common mistakes.

  7. Assuming the Subject Alternative Name (SAN) property of an SSL certificate contains two DNS names. domain.example. host.domain.example. but the Common Name (CN) is set to only one of both: CN=domain.example.

  8. When a certificate, or an identity extracted from a certificate, is "shown" to a human user, the Common Name will figure proeminently. For instance, if using smart card logon on a Windows system, then the logon screen will show the Common Name in big letters when the smart card is inserted.

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