Free SSL certificates: use Let’s Encrypt with ISPConfig 3

View of the Chrome Certificate info pane for tomlankhorst.nlAs you might have noticed this site uses HTTPS. Obtaining SSL certificates was always a bit of a hassle. Finding a certificate authority, doing regular payment, renewals and installing the certificate on your server. Let’s Encrypt is an initiative to provide a better way of enabling encryption on websites. It is open, automated and above all: it offers free SSL certificates. Learn to use Let’s Encrypt on an ISPConfig 3.0 server.

I assume you already have an ISPConfig server up and running. You might have a number of sites that use plain HTTP of HTTPS that you want to secure with free SSL certificates. That’s good, we’re going to do the following:

  1. Obtaining certbot
  2. Requesting free SSL certificates
  3. Configuring SSL in ISPConfig
  4. Enabling automatic periodical renewal

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