How to generate CSR (Certificate Signing Request)?


Nginx: Generate CSR

  Prior to purchasing a cert, you need to generate a private key, and a CSR file (Certificate Signing Request). You'll be asked for the content of the CSR file when ordering the certificate.

openssl req -new -newkey rsa:2048 -nodes -keyout example_com.key -out example_com.csr

This gives you two files:

  • example_com.key — your Private key. You'll need this later to configure nginx.
  • example_com.csr — Your CSR file.

Now, purchase the certificate. You should soon get an email with your PositiveSSL Certificate.




Apache 2.x: Generate CSR

  Follow these instructions to generate a certificate signing request (CSR) for your Apache Web Server. When you have completed generating your CSR, cut/copy and paste it into the CSR field on the SSL certificate-request page.


1. Log in to your server's terminal (SSH).


2. At the prompt, type the following command:

openssl req -new -newkey rsa:2048 -nodes -keyout yourdomain.key -out yourdomain.csr


Replace yourdomain with the domain name you're securing. For example, if your domain name is, you would type coolexample.key and coolexample.csr.


3. Enter the requested information:

  • Common Name: The fully-qualified domain name, or URL, you're securing. If you are requesting a Wildcard certificate, add an asterisk (*) to the left of the common name where you want the wildcard, for example *
  • Organization: The legally-registered name for your business. If you are enrolling as an individual, enter the certificate requestor's name.
  • Organization Unit: If applicable, enter the DBA (doing business as) name.
  • City or Locality: Name of the city where your organization is registered/located. Do not abbreviate.
  • State or Province: Name of the state or province where your organization is located. Do not abbreviate.
  • Country: The two-letter International Organization for Standardization (ISO) format country code for where your organization is legally registered.


If you do not want to enter a password for this SSL, you can leave the Passphrase field blank. However, please understand there might be additional risks.


4. Open the CSR in a text editor and copy all of the text.


5. Paste the full CSR into the SSL enrollment form in your account.






Was this information helpful?



Perhaps it would also be interesting