- Log in to DirectAdmin and open SSL Certificates.
- Choose Let's Encrypt as the certificate type — this is free and renews automatically.
- Select the domain (and any subdomains, such as www) to include on the certificate.
- Click Save; the certificate is usually issued within a minute.
Once issued, your site is accessible over https:// immediately. See Forcing an HTTPS Redirect to make sure visitors are sent to the secure version automatically.