I followed this guide to install a Comodo SSL to my VPS : https://www.digitalocean.com/community/tutorials/how-to-install-an-ssl-certificate-from-a-commercial-certificate-authority (Apache version)
First, I us...
As per the guide you've linked to, you should have two VirtualHost blocks -- one serving requests on Port 80 and then one similar to the above that handles requests on Port 443 (i.e. SSL).
Your first Virtual...