Varnish

A reverse proxy server that is used as a cache mechanism for Apache page requests. Varnish listens on port 80, but it can be bypassed by directly accessing Apache on port 8080.

The Varnish secret key for the box is 04788b22-e179-4579-aac7-f3541fb40391, you will need this when using the Varnish modules in Drupal. Also you will need to select 3.x as your Varnish version and set the Varnish Control Terminal to be 127.0.0.1:6082.

This module can be found at https://www.drupal.org/project/varnish/.