I produced and co-authored Inside Network Perimeter Security, which is a practical guide to designing, deploying, and maintaining network defenses. This book is unusual in that it has a consistent phrasing and style, yet it consolidates the experience of more than a dozen information security professionals working together as a team of writers and reviewers.
The first edition of the book was very well received, which motivated us to update and expand its text. As a result of this effort, the second edition of the book became available in stores in March, 2005.
![insidenps-2ed-cover-large](https://cdn.zeltser.com/wp-content/uploads/2015/01/insidenps-2ed-cover-large-233x300.gif)
Inside Network Perimeter Security, 2nd Edition
By Stephen Northcutt, Lenny Zeltser, Scott Winters, Karen Kent, Ronald W. Ritchey
ISBN: 0672327376
Sams Publishing
March, 2005
The second edition is more recent, but the Amazon.com listing for the book's first edition might be useful for a historical perspective:
![insidenps-1ed-cover-large](https://cdn.zeltser.com/wp-content/uploads/2015/01/insidenps-1ed-cover-large-243x300.gif)
Inside Network Perimeter Security, 1st Edition
By Stephen Northcutt, Lenny Zeltser, Scott Winters, Karen Kent, Ronald W. Ritchey
ISBN: 0735712328
New Riders/Sams Publishing
June, 2002