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Linux System Security: The Administrator's Guide to Open Source Security Tools, Second Edition, by Scott Mann, Ellen L. Mitchell, Mitchell
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As more companies are moving to Linux for mission-critical applications, security becomes a major issue. This guide explains the pros and cons of the most the valuable open source security tools and is complete with implementation details. It gives detailed instructions on the implementation, configuration, and use of publicly available tools and features of Linux as they relate to Linux security. Essential background information is provided in the book's introductory chapters. Administrators will learn to: Prepare Linux systems for a production environment; Identify vulnerabilities, and planning for security administration; Configure Linux-based firewalls, authentication, and encryption; Secure filesystems, email, web servers, and other key applications; Protect mixed Linux/Unix and Windows environments. New to this Edition: Updated for Redhat 7.2 ; One of the first Linux security books to cover Bastille, a hardening program which tightens system security and can even lock down the entire system in cases where the system is seriously compromised; New chapter on network sniffers and port scanners used to detect intruders; Will Cover Open SSH - the new open source version of a popular suite of connectivity tools which allow you to login into remote computers and execute commands on these computers. Open SSH contains encryption capabilities that encrypts all traffic including passwords.
- Sales Rank: #2928916 in Books
- Published on: 2002-09-18
- Original language: English
- Number of items: 1
- Dimensions: 9.50" h x 1.80" w x 7.20" l,
- Binding: Hardcover
- 896 pages
Amazon.com Review
The introduction of Linux System Security acknowledges that there's no magic bullet as far as security is concerned. Security-minded system administration is a process of constant revision. It promises, though, that "[i]f you follow the procedures outlined in this book, you will certainly reduce your level of vulnerability." The book delivers on that promise in spades.
Using Red Hat Linux as the demonstration environment, the authors explain how to use a suite of publicly available tools to analyze, protect, and monitor your machines and networks. They approach the subject from a practical standpoint, emphasizing software and its use while referring the reader (using copious bibliographic notes) to more specialized works for detailed information on cryptography, firewall configuration, and other subjects.
Scott Mann and Ellen Mitchell have done excellent work in combining explanations of the "soft" aspects of security management with the particulars of using software. In a typical section, they explain how to acquire, install, and run Crack, a password breaker. First they show how a bad guy would use Crack to get unauthorized access to a machine over a network; then they explore the "white hat" applications of the program as a security tool for preemptively weeding out weak passwords. More detailed coverage goes to tiger and Tripwire, a pair of powerful auditing and monitoring tools. Along with Maximum Linux Security (which covers more offensive and defensive weapons in less detail), this is one of the two best Linux security books you can own. --David Wall
Topics covered: Linux security practices and tools, as demonstrated under Red Hat Linux 5.2 and 6. Software and commands include Pluggable Authentication Modules (PAM), OPIE, syslog, sudo, xinetd, Secure Shell (SSH), Crack, tiger, Tripwire, The Cryptographic File System (TCFS), and ipchains. The authors discuss administrative policies and procedures along the way.
From the Back Cover
Lock down your Linux system NOW!
- Up-to-the-minute security techniques for your entire Linux environment!
- NEW! In-depth coverage of Bastille, the breakthrough Linux lockdown tool!
- NEW! Intrusion detection with network sniffers and port scanners
- NEW! Complete coverage of the OpenSSH encryption suite
- Firewalls, email, Web services, filesystems, applications, and more
- Completely updated for RedHat 7.2
Now there's an up-to-the-minute, hands-on guide to using open source tools to protect any Linux system! Completely updated for the newest tools and distributions, Linux System Security, Second Edition covers virtually every facet of Linux security, from firewalls and intrusion detection to authentication and secure Web services. You'll master over a dozen crucial open source security tools, including sudo, portmap, xinetd, tiger, tripwire, ipchains, pam, crack, and more. Along the way, three long-time Linux sysadmins will show you the "gotchas," rules of thumb, and undocumented tricks it would take you years to learn on your own!
- Preparing Linux systems for a production environment
- Using Bastille to lock down Linux systems without unnecessarily compromising their functionality
- Combatting Trojan horses, backdoors, password cracking, buffer overflows, spoofing, DoS, and more
- OpenSSH: eliminating eavesdropping, connection hijacking, and other network-level attacks
- Detecting intrusions with network sniffers and port scanners
- Firewalls, email, Web services, filesystems, applications, and much more
- Protecting mixed Linux/UNIX(r) environments
- Includes a concise introduction to security policies
Want the benefits of Linux without the security risks? Get Linux System Security, Second Edition!
Prentice Hall Series on Computer Networking and Distributed Systems, Radia Perlman, Series Advisor
About the Author
SCOTT MANN is a Linux software engineer at LeftHand Networks in Colorado. He has previously specialized in Linux and UNIX systems for both SGI and Sun Microsystems. His previous Prentice Hall PTR books include Linux TCP/IP Network Administration.
ELLEN L. MITCHELL is a security analyst at Texas A&M University, where she is responsible for campus network security, development, and administration. She currently maintains the Tiger UNIX security package.
MITCHELL KRELL, Ph.D., is a former university professor turned consultant. He currently travels around the country teaching classes and consulting for various government agencies on a variety of topics including Linux, IRIX, system administration, networking, web development, and computer security.
Most helpful customer reviews
6 of 9 people found the following review helpful.
An excellent security reference for UNIX systems
By Roger A. Rubio
Anyone involved in securing computers and networks usually has several security texts on their bookshelf. No one text can have all the answers for every security problem out there, and one of the best things going for this book is that it doesn't claim to do so. But it does contain information on some excellent tools and resources you can use to secure not just your Linux system, but systems with a lot of other flavors of UNIX. The book talks about the most common security vulnerabilities and various open source packages which do everything from detecting these problems to blocking them out as completely as possible. The beginning of the book has some very useful lists of Examples, Tables, and Figures which give you easy access to important concepts. Appendixes give excellent Internet resources usually only known to hackers and other security experts along with tools not covered by the book (but pointers to where to find more info). The style the book is typeset in is very similar to the Stevens books on UNIX Programming and TCP/IP, which makes it easy to read. I would say this book makes an excellent companion to Maximum Security, by Anonymous. Maximum Security gives you the information blast, and this book expands on some of the important tools like tiger, xinetd, and Tripwire. All in all, a good one to add to your security library.
9 of 9 people found the following review helpful.
A Wide Breadth of Practical In-Depth Information
By Howard Holm
This is the best of the books I've seen on Linux system security. It focuses almost exclusively on freely available tools, and therefore should appeal to those poorly funded installations that use Linux because of its low cost. The authors cover many tools in the detail needed to obtain, install, and use them in an intelligent way. I was very impressed with the scope of coverage, from system policies to the use and configuration of crack, and everything in between. Although not everything within that scope can be covered in complete detail, the book also includes many useful references for additional information.
Among my few complaints would be that the authors tended to present the tools within the context of a network utilizing firewalls, a DMZ, and limited service servers. In practice many installations will not be so well constructed. In fairness, the utility of the information presented was usually unaffected by the assumed architecture. Although the presentation is relatively distribution neutral, the examples and specifics referred almost exclusively to RPM based RedHat 5 and 6. I would have been interested in seeing parallel details for Debian based distributions, if for nothing else than to gain a sense of the differences that might be encountered based on packaging.
14 of 16 people found the following review helpful.
Probably the best book on open source security tools
By kievite
Actually all tools described are not Linux specific and can be used for any Unix including FreeBSD and Solaris.
The authors seems to know the subject and really used tools that they are writing about. For several popular tools the book provides some useful info that is difficult to find elsewhere. Pretty decent typography, although it's a little bit too academic and does not use icons on margins that IMHO simplify reading.
As for the classic open security tools, the book covers PAM(36 pages), Sudo(20 pages), TCP Wrappers(24 pages), SSH(55 pages), Tripwire(24 pages), CFS and TCFS (30 pages), and ipchains.
From the first reading it looks like the chapters are *not* a rehash of existing online documentation. In addition to the chapters about classic open source security tools I like chapters about logs: a chapter on syslog (Ch.8) and a chapter on log file management (Ch.17).
Now about weaknesses. The chapter on Tiger is rather weak. Moreover regrettably Tiger is a legacy tool, but actually information is not completely useless -- it's not difficult to switch to another tool after one understands how Tiger works. Actually Perl is superior for writing Unix vulnerability scanners in comparison with shell. May be hardening scripts like Bastille would be a better choice for this chapter in the second edition of the book.
Book is incomplete in a sense that neither Snort (or any similar intrusion detection tool), nor open source network scanners (Saint, Sara, etc.) are covered.
Of course there are some typos, but generally not that many. But what is really bad is that the Prentice Hall book page currently is pretty basic with no errata or additional links. The authors do not provide a WEB site for the book.
This book can probably be used for studying Unix security at universities along with somewhat outdated Practical Unix and Internet Security and this combination can somewhat compensate deficiencies of the latter (non tool oriented descriptive approach).
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