As computer networks grow in size and complexity, there is an increasing role for applications that enable us to interconnect networks and filter network traffic. pfSense is one such application. This book endeavors to enable relative newcomers to the world of computer networking to utilize pfSense in building their own networks. In fact, by the end of this chapter, even a pfSense neophyte should be able to determine where to deploy pfSense within a network, which hardware to select, and how to install pfSense—everything that is needed to get a pfSense firewall/router up and running for the first time.

We assume that most readers of this book will be using pfSense on a home network or a small office/home office (SOHO) network, and we have tailored the content accordingly. Fundamental networking concepts will be described in some detail, as well as the...