How to install an SSL Certificate
To get the green padlock for your website and make it secure, you will need to get an SSL certificate first before moving forward into this guide.
Issuing SSL Certificate
You can order an SSL certificate from different providers. Once you have ordered the SSL certificate, your SSL provider will need the CSR (Certificate Signing Request). To generate CSR for your domain, go to your Control Panel > SSL/TLS > click the Configure button, then Generate Key / CSR.
Copy the generated text from the CSR field and paste it to your certificate provider's SSL page and follow the steps to generate SSL certificate and Private Key.
If you already have an SSL certificate for your domain, you can install it for your website:
To do so, you will need the certificate and the private key of your certificate. Once you find these files, copy them (one at a time, including the BEGIN PRIVATE KEY / CERTIFICATE and END PRIVATE KEY / CERTIFICATE lines)
If you have lost the Certificate and Private Key files/text, you will need to re-issue the cerificate by following Issuing SSL Certificate above.
Once done, go to your Control Panel, click SSL/TLS and then Configure in-front of the domain you want to install the certificate to.
After that, paste the private key you have copied in the Private Key field and click Upload Key.
Upload the Certificate text to Certificate field. Make sure that you include the Begin Certificate and End Certificate text also in this field.
For Comodo Certificates, you need to add text from following files in the following order in the Certificate field:
Check if SSL is Installed Correctly:
Once installed, you need to verify that the SSL is properly installed and working. The easiest and fastest way to do that is to use an online SSL checking servier like: SSL Checker