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A Certificate Signing Request (CSR) is a standardized method used to send your server’s public key to a Certificate Authority (CA) when applying for an SSL certificate. This request also includes essential information about your organization and domain name, which is crucial for the proper validation and issuance of any SSL certificate.
When generating a CSR, your server software will typically prompt you for the following details:
Organization Name: This is your company’s full legal name.
Common Name (CN): The fully Qualified Domain Name (FQDN) that the SSL certificate will secure.
Location: This includes the country (using the global 2-letter country code) and, optionally, the state or locality.
Organization Unit (OU): If applicable, this specifies a specific department within your organization.
Key Size: The size of the encryption key used for the certificate. The minimum recommended size is 2048 bits.