WebServer - Proxy VirtualHost Configuration

An Example:

• FQDN being proxied
  • Test.Domain.Net
• Internal server FQDN
  • Server.LocalDomain.net

#########################
# Test.Domain.Net       #
#########################

# Proxy the local machine name for completeness
<VirtualHost *:80>
    ServerName Server.LocalDomain.net
    Redirect permanent / https://Test.Domain.Net/
</VirtualHost>

# Enforce use of SSL
<VirtualHost *:80>
    ServerName Test.Domain.Net
    Redirect permanent / https://Test.Domain.Net/
</VirtualHost>

# The actual proxy definition
<VirtualHost _default_:443>
    ServerName Test.Domain.Net
    ProxyRequests on
    SSLEngine On
    SSLProxyEngine On
    ProxyPreserveHost Off

    # Redirect HTTPS traffic
    ProxyPass / https://Server.LocalDomain.net/
    ProxyPassReverse / https://Server.LocalDomain.net/

    SSLCertificateFile /etc/letsencrypt/live/Test.Domain.Net/fullchain.pem
    SSLCertificateKeyFile /etc/letsencrypt/live/Test.Domain.Net/privkey.pem
    <Proxy "*">
        Order allow,deny
        Allow from all
    </Proxy>
    ErrorLog /var/log/apache2/Proxy/TDN.log
    CustomLog /var/log/apache2/Proxy/TDN-access.log combined
</VirtualHost>

This can be placed in a file in /etc/apache2/sites-available (And, of course, linked into /etc/apache2/sites-enabled). It could also be simply added to /etc/apache2/apache2.conf If you want to do it that way...