Debian 8 - SSL Certificate is not working - apache

Question

I have recently moved a website from my old web server with 123-reg.co.uk to a new Linode web server hosted with Linode.
I am running Apache with Debian 8.9.
123-reg provided me with an SSL certificate for my website which, of course, was deactivated when I moved the website to the new server. So I set to work manually reactivating the certificate on my new server.
I was able to get the necessary SSL files (CA Bundle, Key and Certificate) from 123-reg and I followed Linode's instructions to setup the SSL certificate on their servers using the following tutorials:
First tutorial and
second tutorial.
Here is the site's config file:
<VirtualHost *:80>
# All of the files here exist on the server
SSLEngine On
SSLCertificateFile /etc/ssl/certs/zetec-it.com.crt
SSLCertificateKeyFile /etc/ssl/private/zetec-it.com.key
SSLCACertificateFile /etc/ssl/certs/ca-certificates.crt
ServerAdmin webmaster#zetec-it.com
ServerName zetec-it.com
ServerAlias www.zetec-it.com
DirectoryIndex index.html index.php
DocumentRoot /var/www/html/zetec-it.com/public_html
LogLevel warn
ErrorLog /var/www/html/zetec-it.com/log/error.log
CustomLog /var/www/html/zetec-it.com/log/access.log combined
</VirtualHost>
The setup seems legit, but when I attempt to access the website via https the browser states that the connection isn't secure.
I'm fairly new to server admin; does anyone have any suggestions or potential solutions?

Answer 1

You need a VirtualHost which is listening on port 443 in order to have working HTTPS. You configured your VirtualHost to listen on Port 80 while having SSLEngine On.
In order to get https working you would only need to change <VirtualHost *:80> to <VirtualHost *:443>.
Once you did that, you would not have a configuration that handles http connections to (there would not be any VirtualHost waiting for connections for ServerName zetec-it.com).
There are generally to ways to go to serve http connections requesting the same hostname:
You redirect them to https using something like this (uses mod_rewrite in order to redirect to the same path):
<VirtualHost *:80>
ServerName zetec-it.com
ServerAlias www.zetec-it.com
RewriteEngine on
RewriteRule ^ https://zetec-it.com%{REQUEST_URI} [END,NE,R=permanent]
</VirtualHost>
You deliver the same content through http as well
<VirtualHost *:80>
# All of the files here exist on the server
ServerAdmin webmaster#zetec-it.com
ServerName zetec-it.com
ServerAlias www.zetec-it.com
DirectoryIndex index.html index.php
DocumentRoot /var/www/html/zetec-it.com/public_html
LogLevel warn
ErrorLog /var/www/html/zetec-it.com/log/error.log
CustomLog /var/www/html/zetec-it.com/log/access.log combined
</VirtualHost>
Either way you need two config files, the https one (which is basically your example from above, remember to replace 80 with 443) and one for http which I gave you 2 examples for.
You can put them into separate files, remember to activate them in this case.