First Upate System:
$ sudo apt update
$ sudo apt upgrade -yInstall Apache:
$ sudo apt install -y apache2Install build-essential:
$ sudo apt install -y build-essentialInstall dependacies:
$ sudo apt install -y libapache2-mod-proxy-html libxml2-devConfigure Apache:
$ sudo a2enmod proxy
$ sudo a2enmod proxy_http
$ sudo a2enmod proxy_ajp
$ sudo a2enmod rewrite
$ sudo a2enmod deflate
$ sudo a2enmod headers
$ sudo a2enmod proxy_balancer
$ sudo a2enmod proxy_connect
$ sudo a2enmod proxy_htmlAdd the local.conf (details) to the correct path:
$ sudo nano /etc/apache2/sites-available/local.confTurn off the default website:
$ sudo a2dissite 000-default.confTurn on the local configurations:
$ sudo a2ensite local.confRestart Apache:
$ sudo service apache2 restartThat is all that is needed, you can add more proxies to the local.conf as needed, and just reload Apache each time.