SSL INSTALLATION by ZEROSSL

Login account to https://zerossl.com/ and click on [New Certificate].

Enter [domain name] to verify is the domain is exist and allow to install SSL.

Select [90 day certificate] and keep [Next Step] until [Finalize Your Order].

Select the suitable package and continue [Next Step].

Select [HTTP File Upload] and download Auth File.

Upload the Auth File downloaded at the HTTP server path under /.well-known/pki-validation/. You may create the directory with FTP Server or create in the server control panel instead. Below is the sample if you are create directory and upload Auth File with FTP Server.

Make sure your file is available under the domain link etc: http://domain-name/.well-known/pki-validation/Auth-File.txt. Then continue [Next Step] and [Verify Domain].

Select server type, and download zip file and click [Next Step].

At the end,refer to Install SSL Certificate. For example, if your server is cPanel:

• Scroll down to the "Security" page of the cPanel homepage and select "SSL/TLS" to access the SSL/TLS Manager, which allows you to manage the configuration of SSL & TLS certificates.

• Click "Manage SSL Sites".

• Use the "Domain" dropdown menu to select the domain you would like to install your SSL certificate for.

• Now enter (copy & paste) your certificate files (certificate.crt, ca_bundle.crt & private.key) into the respective fields.

• Finally, click on "Install Certificate".

If you server is Aliyun, refer SSL Installation at 阿里云SSL.