Set up reverse proxy

If we have a customer server that they don't want to expose to the outside world (for http), we can set up a reverse proxy on our external facing web server.

In the customer host

We set up a "regular" website with an arbitrary URL. In this example arbitrary url is "images.burnups.com.au"

/etc/httpd/conf/httpd.conf:

<VirtualHost *:80>
     ServerAdmin support@crecom.com.au
     DocumentRoot /var/www/html/images/
     ServerName images.burnups.com.au

    Alias /printers /var/www/html/printers
    <Directory /var/www/html/printers>
        Options FollowSymLinks MultiViews ExecCGI
        AllowOverride Options
        Order allow,deny
        Allow from all
    </Directory>
     ErrorLog logs/images.burnups.com.au-error_log
     CustomLog logs/images.burnups.com.au-access_log common
</Virtualhost>

In the external facing web server:

/etc/hosts:

192.168.240.139 images.burnups.com.au

/etc/httpd/conf/httpd.conf

<VirtualHost *:80>
        ServerName burnupsimages.crecom.com.au
        ProxyPass / http://images.burnups.com.au/
        ProxyPassReverse / http://images.burnups.com.au/

        ErrorLog logs/burnupsimages-error.log
        CustomLog logs/burnupsimages.log combined
</VirtualHost>

and go to DNS and make sure "burnupsimages.crecom.com.au" resolves to our outward facing server.

Setting up secure https

On the outward facing server, run "letsencrypt" and choose the correct domain from the list. The script will make the appropriate changes to your http config.