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Generating a Certificate Signing Request (CSR)

Server Software Type:

Microsoft IIS 5.x / 6.x


Apache Mod_SSL
Apache OpenSSL

PLEASE NOTE: CSR Key size requirements

As of December 20, 2010 we will no longer issue certificates of less than 2048 bit key length and will not accept Certificate Signing Requests (CSRs) generated with keys of less than 2048 bit.

For more information please click here: CSR Key size requirements

Certificate Signing Request overview

The first part of enrolling for your Complete ssl Certificate is to generate a Certificate Signing Request (CSR). CSR generation is wholly dependent on the software you use on your webserver. Select your webserver software from the list after reading the following general points:

General Points to remember before creating your CSR:

  • The Common Name field should be the Fully Qualified Domain Name (FQDN) or the web address for which you plan to use your Certificate, e.g. the area of your site you wish customers to connect to using SSL. For example, an Complete ssl Certificate issued for will not be valid for If the web address to be used for SSL is, ensure that the common name submitted in the CSR is

InstantSSL Certificates are compatible with almost all popular webserver software. If your webserver software does not appear on the list, please contact with full details of your webserver software and we will contact you with further instructions.

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