pfSense is a firewall/router computer software distribution based on FreeBSD. The open source pfSense Community Edition and pfSense Plus is installed on a physical computer or a virtual machine to make a dedicated firewall/router for a network. This tutorial teaches you how to install the pfsense firewall on a physical computer using a bootable flash drive / DVD. Tips on where you can purchase hardware appliances that ship with PFSENSE preinstalled are also available here.