SSL Certificates fall into two broad categories: 1) Self-Signed Certificate which is an identity certificate that is signed by the same entity whose identity it certifies-on signed with its own private key, and 2) Certificates that are signed by a CA (Certificate Authority) such as Let’s Encrypt, Comodo and many other companies.
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Self-Signed Certificates are commonly used in test environments for LAN services or applications. They can be generated for free using OpenSSL or any related tool. On the other hand, for sensitive, public-facing production services, applications or websites, it is highly recommended to use a certificate issued and verified by a trusted CA.
The first step towards acquiring an SSL certificate issued and verified by a CA is generating a CSR (short for Certificate Signing Request).
In this article, we will demonstrate how to create a CSR (Certificate Signing Request) on a Linux system.
Creating a CSR – Certificate Signing Request in Linux
Apr 12, 2020 Now to create SAN certificate we must generate a new CSR i.e. Certificate Signing Request which we will use in next step with openssl generate csr with san command line. root@centos8-1 certs# openssl req -new -key server.key.pem -out server.csr You are about to be asked to enter information that will be incorporated into your certificate request. Generating a Certificate Request to Send to a CA Once you have created a key, the next step is to generate a certificate request which you need to send to the CA of your choice. Make sure you are in the /usr/share/ssl/certs/ directory, and type the following command.
To create a CSR, you need the OpenSSL command line utility installed on your system, otherwise, run the following command to install it.
Firebase generate new api key. Then issue the following command to generate a CSR and the key that will protect your certificate.
where:
Create Csr Apache Linux
Answer correctly, the questions you will be asked. Note that your answers should match information in legal documents regarding the registration of your company. This information is critically checked by the CA before issuing your certificate.
After creating your CSR, view the contents of the file using a cat utility, select it and copy it.
Copy CSR Key
Then go back to your CA’s website, log in, go to the page will contain the SSL certificate you purchased, and activate it. Then in a window such as the one below, paste your CSR in the correct input field.
Pre shared key generator tool. In this example, we created a CSR for a multiple domain certificate purchased from Namecheap.
![]() Generate Key Code
Then follow the rest of the instructions to initiate activation of your SSL certificate. For more information about OpenSSL command, see its man page:
Linux Csr RequestUbuntu Generate Csr
That’s all for now! Always remember that the first step to getting your own SSL certificate from a CA is to generate a CSR. Use the feedback form below to ask any questions or share your comments with us.
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