Subject alternative name ssl certificate

What is Subject Alternative Name SSL?

The Subject Alternative Name (SAN) is an extension to the X. 509 specification that allows users to specify additional host names for a single SSL certificate. The use of the SAN extension is standard practice for SSL certificates, and it’s on its way to replacing the use of the common name.

How do I add a Subject Alternative Name to a certificate?

Do the following:

  1. Open the hosts. …
  2. Add the loop back addresses and the host names. …
  3. Verify if the hosts were added, by pinging each host in the Command prompt. …
  4. Create a copy of the pscpki. …
  5. Edit the myssl.cnf to add the following under the x509v3_extensions section:

What is subject in SSL certificate?

The subject of the certificate is the entity its public key is associated with (i.e. the “owner” of the certificate). The subject field identifies the entity associated with the public key stored in the subject public key field. The subject name MAY be carried in the subject field and/or the subjectAltName extension.

How many subject alternative names can a certificate have?

Subject Alternative Name (SAN) Certificates

Depending on the issuing Certificate Authority, SAN certificates can support 100 or more different FQDNs in one certificate. A SAN certificate includes the standard Subject Name field, which supports a single primary web-based service name.

What is the common name in 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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Is subject alternative name mandatory?

2 Answers. Yes, you need to include each of the subject alternate names and the subject/common name in the Subject Alternate Names section of the CSR. Some certificate authorities will allow you to update a certificate to add new SANs to it, but this always requires an updated CSR.

What is alternate name?

An ‘alternate name’ or ‘nickname’ is a name that you go by or give to a friend that is not your own or their own name. An ‘alternate name’ or ‘nickname’ is a name that you go by or give to a friend that is not your own or their own name.

What is DNS name in certificate?

The Subject Alternative Name Field Explained. The Subject Alternative Name field lets you specify additional host names (sites, IP addresses, common names, etc.) to be protected by a single SSL Certificate, such as a Multi-Domain (SAN) or Extend Validation Multi-Domain Certificate.

How do SSL certificates work?

The web server sends the browser/server a copy of its SSL certificate. … If so, it sends a message to the web server. The web server sends back a digitally signed acknowledgement to start an SSL encrypted session. Encrypted data is shared between the browser/server and the web server.

How do I find my CN certificate name?

509 specification is used in SSL certificates which is the same.

  1. Common Name (CN) We can formulate Command Name like below. …
  2. Subject Alternative Name. Check Common Name In Firefox. …
  3. Secure Connection. Click More Information.
  4. Click `More Information` Click View Certificate.
  5. Click `View Certificate` …
  6. Common Name.
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How can I write my name in certificate?

Most commonly, people write out their first name and surname, and use the initial letter of the middle name, as: Donald J. Trump. Some people, however, go by their middle name rather than first name, in which case the middle name is spelled out and the first name is reduced to an initial, as: D.

What is the certificate common name?

The Common Name (CN) is the fully qualified domain name of the Web server that will receive the certificate (e.g. or Do not include the protocol specifier (i.e., http:// or https://) or any port numbers or pathnames in the common name.

How do you generate a CSR?

Article Quick Links

  1. Open Internet Information Services (IIS) Manager.
  2. Select the server where you want to generate the certificate.
  3. Navigate to Server Certificates.
  4. Select Create a New Certificate.
  5. Enter your CSR details.
  6. Select a cryptographic service provider and bit length.
  7. Save the CSR.
  8. Generate the Order.

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