Securing a Web site using a Free LetsEncrypt Certificate in Plesk Onyx

Since we've upgraded your VPS to Plesk Onyx it's really easy, here is how to do it if you want to do that yourself:

• Click on Subscriptions on the left-side Menu
• Select the domain’s subscription in the list , click to Open the Management page.

Step 1: Generate the Secure Certificate

• Under the domain Website&Domain-> More:

• Scroll down to the bottom and click on LetsEncrypt.

• Fill-in the required fields:
  -- Make sure the correct email address is listed- by default it is the subscription’s owner’s.
  -- If needed, check to include the www as the alternative domain name for the SSL certificate if this is the preferred domain you are using for the web site.

• Make sure it matches the choice you’ve made as “Preferred domain” under Website&Domains->Hosting Settings

• Click Install.

When the certificate is generated, you will see a banner on top of the page saying “Information: Let's Encrypt SSL certificate was successfully installed on the domain.com.

Step 2: Configure the Domain to use the Secure Certificate

This part should already be done. Review the Hosting settings:

• Under Website&Domain click on "Hosting Settings”
• Scroll down to the Security part.
• Make sure the “SSL support” is checked and shows the Lets Encrypt certificate for the domain in the Certificate field.
  If this is not the case:
  Check “SSL support” and select the correct certificate if needed and scroll down to click OK.

Important: At this point you can test your web site pages and make sure they work in https.
If you are using Wordpress, see this article: Switching a WordPress site to HTTPS

Step3: Redirect all web traffic for the domain to HTTPS

• Under Hosting Settings > Under Security section click on Permanent SEO-safe 301 redirect from HTTP to HTTPS.
• Click OK to apply any changes to the domain Hosting & SSL settings.