About CSR Generation Process

To install a digital certificate, you must first generate and submit a Certificate Signing Request (CSR) to the Certification Authority (CA). The CSR contains your certificate application information, and your public key. You can use your Web server software to generate the CSR, which will also create your public/private key pair used for encrypting and decrypting secure transactions.
To generate the CSR you need to select type of the web server that you are using from the list of given web servers.
You will see the below given web servers in list:-

1) lighttpd
2) Nginx
3) Parallels Plesk Panel
4) CPanel/WebHost Manager
5) Microsoft IIS 5 and 6
6) Apache 2.x
7) Microsoft IIS 7
8) Tomcat 4.x/5.x/6.x
9) Microsoft IIS 8
10) Exchange Server 2007
11) Mac OS X Server 10.5
12) Exchange Server 2010
13) Mac OS X Server 10.6
14) Exchange Server 2013
15) F5 BIG-IP Loadbalancer

During the creation of the CSR, you will be prompted to provide certain information about your organization. The Web server software will use this information to create your Web server certificate's distinguished name (DN). Distinguished names uniquely identify individual servers:

The distinguished name contains the following information:
1) Country Code :- Here you have to mention the two-letter International Organization for Standardization format country code for the country in which your organization is legally registered.
2) State/Province :- Here provide the Name of state, province, region, territory where your organization is located.
Note :- Please enter the full name.
3) City/Locality:- Here provide the Name of the city/locality in which your organization is registered/located.
4) Organization :- Please mention the name under which your business is legally registered. The listed organization must be the legal registrant of the domain name in the certificate request.
5) Organizational Unit :- Use this field to differentiate between divisions within an organization.Like:- "Information Technology" or "Accounts"
6) Common name :- The name entered in the CN (common name) field of the CSR Must be the fully-qualified domain name for the website you will be using the certificate for (e.g., "www.yourdomain.com")
Note:-  Please Do not include the "http://" or "https://" prefixes in your common name.

And If you are requesting a wildcard certificate, add an asterisk (*) on the left side of the common name (e.g., "*.yourdomain.com"). This will secure all subdomains of the common name.