How to install Let's Encrypt certificate for domain alias?
Domain alias support was added in Let’s Encrypt version 2.0.0. It is not possible to secure only domain alias with a certificate without securing main domain. But it is possible to create a new Let's Encrypt certificate having specified aliases to secure during the certificate creation.
First, install Let's Encrypt from Extensions catalog if it is not yet installed.
Then create a new certificate:
- Go to Websites & Domains > Let's Encrypt.
- Specify the email address that will be used for urgent notices and lost key recovery. By default, the email address of the subscription owner is used.
- Specify if you want to include an alternative domain name for the domain and each selected alias, for example:
www.example.comfor example.com. We recommend that you select this checkbox.
- Specify if you want to include webmail, for example:
webmail.example.com. We recommend that you select this checkbox.
- If there are domain aliases, select the ones that you want to include in the certificate.
- Click Install to get and install the Let's Encrypt certificate for the subscription.
Finally, secure the main website with its aliases:
- Go to Websites & Domains and click Hosting Settings.
- Select the SSL/TLS support checkbox.
- Select the Let's Encrypt certificate you have just received from the Certificate menu, and click OK.