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How do you create a certificate with subject alternative name?

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How do you create a certificate with subject alternative name?

How to create a certificate using OpenSSL with Subject Alternative Name field (SAN)

  1. Download OpenSSL.
  2. Become a self-signing Certifying Authority (CA)
  3. Create a configuration file for the certificate with Subject Alternative Name.
  4. Create a Certificate Signing Request (CSR)
  5. Sign the request.

What is subject alternative name in certificates?

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 you generate CSR with subject alternative name in Linux?

Verification

  1. Open the command prompt as an administrator and change the directory to C:\OpenSSL-WinXX\bin and run: openssl req -noout -text -in server.csr.
  2. Under Subject Alternative Name, the different DNS names must appear for which this CSR is valid. DNS:test.domain.com, DNS:test2.domain.com, DNS:test3.domain.com.

How do I create a SSL certificate with multiple common names?

How To Generate A CSR for Multi-Domain SSL Certificates?

  1. Create a copy of OpenSSL config file.
  2. Edit the config file and enable [ v3_req ]
  3. Enable SubjectAltName under [ v3_req ] section.
  4. Add Alt Name or SAN names in the config file.
  5. Generate the private key.
  6. Generate the CSR for multi-domain or SAN certificate.
  7. Test the CSR.

How do I put multiple SAN names on a certificate?

Add SANs to your multi-domain certificate

  1. Step 1: Generate CSR.
  2. Step 2: Sign in to your account.
  3. Step 3: Fill out the reissue form.
  4. Step 4: Complete domain control validation (DCV)
  5. Step 5: DigiCert reissues the multi-domain SSL/TLS certificate.
  6. Step 6: Install your reissued SSL/TLS certificate.

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

How to add a Subject Alternative Name to a secure LDAP…

  1. Open Internet Explorer.
  2. Click Request a Certificate.
  3. Click Advanced certificate request.
  4. Click Create and submit a request to this CA.
  5. In the Certificate Template list, click Web Server.
  6. Provide identifying information as required.

How do I create a CSR file in OpenSSL?

How to Generate a Certificate Signing Request (CSR) With OpenSSL

  1. Step 1: Log Into Your Server.
  2. Step 2: Create an RSA Private Key and CSR.
  3. Step 3: Enter Your CSR Information.
  4. Step 4: Locate Certificate Signing Request File.
  5. Step 5: Submit the CSR as Part of Your SSL Request.

How do you generate a CSR with multiple Sans?

How do I add a SAN to my certificate?

Can certificates have multiple common names?

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.

Can one SSL certificate have multiple domains?

The simple answer is a resounding Yes! You absolutely can use one SSL certificate for multiple domains — or one SSL certificate for multiple subdomains in addition to domains.

How do you add Subject Alternative Name in DigiCert certificate?

How do I create an INF file certificate request?

Generating the Certificate Signing Request

  1. Log in as an administrator.
  2. Open the MS-DOS cmd windows as an administrator.
  3. Enter notepad .
  4. This will open a simple text editor.
  5. Save your file with the appropriate name and .inf file extension, e.g. crsdetails.inf.
  6. Execute the following command:

How do I create a CSR certificate?

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.

How do I generate CSR with Certutil?

Use certreq & certutil to request and approve a cert request as the same user

  1. Step 1: Create a certreq policy file.
  2. Step 2: Generate the certificate request.
  3. Step 3: Submit the certificate request.
  4. Step 4: Approve the certificate request.
  5. Step 5: Retrieve the CA response.
  6. Step 6: Accept the CA Response.

How do I create a certificate with the subject alternative name?

To create a Certificate using the Subject Alternative Name field you need to create an OpenSSL configuration file that allows creating certificates with this attribute. Create a new folder or use a folder with writing permissions. Create an empty text file. Name it openssl-san.cnf The cnf extention is important.

Can OpenSSL be used to generate the Certificate Signing Request?

After a bit of research I found that OpenSSL can be used to generate the certificate signing request with Subject Alternative Names defined, as well as the private key. synology-1512.cnf (create using the text editor of your choice)

Does OpenSSL generate CSR’s with subject alternative name extensions?

This post details how I’ve been using OpenSSL to generate CSR’s with Subject Alternative Name Extensions. You may have noticed that since Chrome 58, certificates that do not have Subject Alternative name extensions will show as invalid.

How to create a self-signed SSL certificate?

In self-signed certificates the CA authority is yourself, therefore, the steps to create a self-signed certificate is follow these steps: 1. Download Open SSL 2. Create your own authority (become a CA) 3. Create a configuration file for the certificate 4. Create a certificate signing request (CSR) for the server 5. Sign the CSR with your CA key 6.