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New Update of Classic Security Reference: O'Reilly Releases "Practical Unix & Internet Security, Third Edition"

March 3, 2003

Sebastopol, CA--When "Practical Unix Security" was first published more than a decade ago, it became an instant classic, saving many a Unix system administrator from disaster. The second edition added much-needed internet security coverage and doubled the size of the original volume. Practical Unix & Internet Security, Third Edition by Simson Garfinkel, Gene Spafford, and Alan Schwartz (O'Reilly, US $54.95) is a comprehensive update of this very popular book--a companion for the Unix/Linux system administrator who needs to secure his or her organization's system, networks, and web presence in an increasingly hostile world.

"This book is a combination of reference material, tutorial, and strategy," explains coauthor Gene Spafford. "It will be useful for years because it teaches the fundamentals of security. It is meant to be a keeper. You'll find other security books written by people who use a 'handle' and whose only claim to fame is that they know how to run hacker tools. 'Practical Unix & Internet Security' was written by security professionals and educators--with more than 40 years' experience among us--to provide fundamental knowledge on this subject."

Focusing on the four most popular Unix variants today--Solaris, Mac OS X, Linux, and FreeBSD--this book contains new information on PAM (Pluggable Authentication Modules), LDAP, SMB/Samba, anti-theft technologies, embedded systems, wireless and laptop issues, forensics, intrusion detection, chroot jails, telephone scanners and firewalls, virtual and cryptographic filesystems, WebNFS, kernel security levels, outsourcing, legal issues, new internet protocols and cryptographic algorithms, and much more.

"Practical Unix & Internet Security" consists of six parts:

  • Computer security basics: introduction to security problems and solutions, Unix history and lineage, and the importance of security policies as a basic element of system security.

  • Security building blocks: fundamentals of Unix passwords, users, groups, the Unix filesystem, cryptography, physical security, and personnel security.

  • Network security: a detailed look at modem and dialup security, TCP/IP, securing individual network services, Sun's RPC, various host and network authentication systems (e.g., NIS, NIS+, and Kerberos), NFS and other filesystems, and the importance of secure programming.

  • Secure operations: keeping up to date in today's changing security world, backups, defending against attacks, performing integrity management, and auditing.

  • Handling security incidents: discovering a break-in, dealing with programmed threats and denial of service attacks, and legal aspects of computer security.

  • Appendixes: a comprehensive security checklist and a detailed bibliography of paper and electronic references for further reading and research.

With nearly 1000 pages of helpful text, scripts, checklists, tips, and warnings, "Practical Unix & Internet Security, Third Edition" remains the definitive reference for Unix administrators and all others who care about protecting their systems and data from today's threats.

Praise for the previous editions:

"If you know nothing about Linux security, and only have time for one book you should start with 'Practical Unix & Internet Security.' It's a fat book, but it's accessible, and it gives you a solid grounding in the basics."
--Charlie Stross, Linux Format, May 2002

"If you're a novice at computer security and want to learn, get this book and set aside time to read some of it every day. The bookmark will move slowly, but keep moving it. If you're already an expert, get this book and keep it at hand as a reference--and read a chapter a month, just to remind yourself of things you've forgotten."
--Jennifer Vesperman, linuxchix.org

"...replete with practical examples, including typescripts of console command sessions, clear and easily understood diagrams...This classic, indispensable volume is the right book to trust."
--Christopher Brown-Syed, "Library and Archival Security, Vol. 17, Number 1," 2001

"Securing Unix systems and networks against crackers and other assorted bad guys is a top priority for most organizations (or at least it should be). In order to properly protect your systems, you need to have the right information at your disposal: without this information you can easily miss holes in your security implementation. The authors of 'Practical Unix & Internet Security,' Simson Garfinkel and Gene Spafford, write in a very down-to-earth, simple fashion that never leaves the reader wondering. Instead, the book is written for both those new to the field and the professionals that need a good reference manual lying on their shelves. 'Practical Unix & Internet Security' is a very popular book, and has reached almost cult status in many circles. The reason behind this is simple: there is a lot of information, the information is easily readable, and topics are grouped logically. What else can a reader ask for?"
--Dustin Puryear, 32bitsonline, December 2000

"To call this highly readable book comprehensive is an understatement. The breadth is vast, from fundamentals (definitions of computer security; the history of Unix) and commonsense but little-observed security basics (making backups; physical and personnel security; buggy software) to modern software (NFS, WWW, firewalls) and the handling of security incidents. The section on users alone is 21 pages long--and worth every pageThe Internet covers too much and moves too quickly for any book to cover every security aspect of every piece of software, but this book comes close. More importantly, it gives you a grounding in the fundamental issues of security and teaches the right questions to ask--something that will stay with you long after today's software is obsolete."

"[A] keeper...the second edition of Garfinkel and Spafford's 1991 security book...has grown immensely, from barely over 500 pages to nearly a thousand, but most of it is both worthwhile and important....Security is a really important topic. Your users don't understand it. Educators don't; nor does the medical profession. This is a fine book on a difficult topic."
--Peter H. Salus, ;login:, August 1996

"Buy this book and save on aspirin."
--Cliff Stoll, author of "The Cuckoo's Egg and Silicon Snake Oil"

"This is exactly the type of practical, easy to follow book that system administrators need to stay one step ahead of the system crackers--if you have time to read only one security book, this should be it."
--Kevin J. Ziese, Captain, United States Air Force; Chief, Countermeasures Development, AF Information Warfare Center

Additional Resources:

Practical Unix & Internet Security, Third Edition
Simson Garfinkel, Gene Spafford, and Alan Schwartz
ISBN 0-596-00323-4, 954 pages, $54.95 (US), $85.95 (CAN), 38.95 (UK)
1-800-998-9938; 1-707-827-7000

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