A CSR code (Certificate Signing Request) is a specific code and an essential part of the SSL activation process. It contains information about the website name and the company contact details. For many reasons, the code should be created on the hosting server end. For some servers, it is the obligatory condition. Note: Many hosting providers offer CSR code generation assistance to their clients where possible. Thus, it is worth checking with the web-hosting company whether they provide such a service and whether it is available in your hosting plan.

You can generate a Certificate Signing Request code yourself, e.g. if you manage the hosting server on your own or if this is the best option for your server type/hosting plan. In this case, select your web server from the list below and follow the instructions. Apache OpenSSL/ModSSL/Nginx/Heroku AWS Certreq cPanel CWP 7 Citrix NetScaler VPX DirectAdmin Exchange 2007 (PowerShell) Exchange 2010 Exchange 2013 (EAC) Exchange 2013 (Shell) Glassfish Google Cloud Service IIS 7 IIS 8&10 ISPConfig Mac OS via Keychain Mac OS X Server/Yosemite/El Capitan Namecheap EasyWP App Node.js Plesk 12 Plesk Onyx SonicWall Sun Java System Web Server 7.x Synology NAS Tomcat (using keytool) Unifi Vesta CP Webmin WHM Windows with OpenSSL Zimbra using MMC/Certreq/Powershell on a Windows-based server Note: CSR codes should have no less than 2048-bit key size.