David Zientara is a software engineer and IT professional living in northern New Jersey. He has 20 years of experience in IT, and he has been the lead software engineer for Oxberry since the mid-1990s. His interest in pfSense prompted him to create a pfSense website in June 2013, and eventually to author this book.
I wish to thank my editors for helping ensure that the final product is the best that it can be. I also wish to thank my parents for their constant support in my endeavors.