What This Book Covers
The book is intended to be a stand-alone document to enable you to work on your machines with only short forays into man pages and occasional reference to the online and printed resources listed in Appendix A.
Your system probably comes with a prewritten pf.conf file containing some commented-out suggestions for useful configurations, as well as a few examples in the documentation directories such as /usr/share/pf/. These examples are useful as a reference, but we won’t use them directly in this book. Instead, you’ll learn how to construct a pf.conf from scratch, step by step.
Here is a brief rundown of what you will find in this book:
Chapter 1, walks through basic networking concepts, gives a short overview of PF’s history, ...
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