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The Tao of Network Security Monitoring: Beyond Intrusion Detection View Larger Image | Richard Bejtlich
Addison-Wesley, Paperback, Published July 2004, 798 pages, ISBN 0321246772 | List Price: $64.99
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"The book you are about to read will arm you with the knowledge you need
to defend your network from attackers—both the obvious and the not so obvious....If
you are new to network security, don't put this book back on the shelf! This is
a great book for beginners and I wish I had access to it many years ago. If you've
learned the basics of TCP/IP protocols and run an open source or commercial IDS,
you may be asking 'What's next?' If so, this book is for you."
—Ron Gula, founder and CTO, Tenable Network Security, from the Foreword
"Richard Bejtlich has a good perspective on Internet security—one
that is orderly and practical at the same time. He keeps readers grounded and
addresses the fundamentals in an accessible way."
—Marcus Ranum, TruSecure
"This book is not about security or network monitoring: It's about both,
and in reality these are two aspects of the same problem. You can easily find
people who are security experts or network monitors, but this book explains
how to master both topics."
—Luca Deri, ntop.org
"This book will enable security professionals of all skill sets to improve
their understanding of what it takes to set up, maintain, and utilize a successful
network intrusion detection strategy."
—Kirby Kuehl, Cisco Systems
Every network can be compromised. There are too many systems, offering too
many services, running too many flawed applications. No amount of careful coding,
patch management, or access control can keep out every attacker. If prevention
eventually fails, how do you prepare for the intrusions that will eventually
happen?
Network security monitoring (NSM) equips security staff to deal with the inevitable
consequences of too few resources and too many responsibilities. NSM collects
the data needed to generate better assessment, detection, and response processes—resulting
in decreased impact from unauthorized activities.
In The Tao of Network Security Monitoring, Richard Bejtlich explores the products,
people, and processes that implement the NSM model. By focusing on case studies
and the application of open source tools, he helps you gain hands-on knowledge
of how to better defend networks and how to mitigate damage from security incidents.
Inside, you will find in-depth information on the following areas.
- The NSM operational framework and deployment considerations.
-
How to use a variety of open-source tools—including Sguil, Argus, and
Ethereal—to mine network traffic for full content, session, statistical,
and alert data.
-
Best practices for conducting emergency NSM in an incident response scenario,
evaluating monitoring vendors, and deploying an NSM architecture.
-
Developing and applying knowledge of weapons, tactics, telecommunications,
system administration, scripting, and programming for NSM.
-
The best tools for generating arbitrary packets, exploiting flaws, manipulating
traffic, and conducting reconnaissance.
Whether you are new to network intrusion detection and incident response, or
a computer-security veteran, this book will enable you to quickly develop and
apply the skills needed to detect, prevent, and respond to new and emerging
threats.
Table of Contents
About the Author.
Foreword.
Acknowledgements.
Legal Notice.
Dedication.
I. INTRODUCTION TO NSM.
1. The Security Process.
What is Security?
What is Risk?
A Risky Case Study.
Security Principles: Characteristics of the Intruder.
Security Principles: Defensible Networks.
Conclusion.
2. What is Network Security Monitoring?
Indications and Warning.
Collection, Analysis, and Escalation.
Detecting and Responding to Intrusions.
Why Do IDS Deployments Often Fail?
Outsiders vs. Insiders: What is NSM's Focus?
Security Principles: Detection.
Security Principles: Limitations.
What NSM Is Not.
Conclusion.
3. Deployment Considerations.
Threat Models and Monitoring Zones.
Accessing Traffic in Each Zone.
Wireless Monitoring.
The Sensor.
Sensor Management.
Conclusion.
II. NSM PRODUCTS.
4. Reference Intrusion Model.
CHM Plans.
Ardala's Attack.
Conclusion.
5. Full Content Data.
A Note on Software Versions.
Libpcap.
Tcpdump.
Tethereal.
Snort as Packet Logger.
Ethereal.
A Note on Commercial Full Content Collection Options.
Conclusion.
6. Additional Data Analysis.
Editcap and Mergecap.
Tcpslice.
Tcpreplay.
Tcpflow.
Ngrep.
Ipsumdump.
Etherape.
NetDude.
P0f.
Conclusion.
7. Session Data.
Forms of Session Data.
Cisco NetFlow.
Fprobe.
Ng_netflow.
Flow-tools.
SFlow and Sflow Toolkit.
Argus.
Tcptrace.
Conclusion.
8. Statistical Data.
What is Statstical Data?
Cisco Accounting.
Ipcad.
Ifstat.
Bmon.
Trafshow.
Ttt.
Tcpdstat.
MRTG.
Ntop.
Conclusion.
9. Alert Data: Bro and Prelude.
Bro.
Prelude.
Conclusion.
10. Alert Data: NSM Using Sguil.
Why Sguil?
So What is Sguil?
The Basic Sguil Interface.
Sguil's Answer to "Now What?"
Decision-Making with Sguil.
Sguil vs. the Reference Intrusion Model.
Conclusion.
III. NSM PROCESSES.
11. Best Practices.
Assessment.
Protection.
Detection.
Response.
Conclusion.
12. Case Studies for Managers.
Introduction to Hawke Helicopter Supplies.
Case Study 1: Emergency Network Security Monitoring.
Case Study 2: Evaluating Managed Security Monitoring Providers.
Case Study 3: Deploying an In-House NSM Solution.
Conclusion.
IV. NSM PEOPLE.
13. Analyst Training Program.
Weapons and Tactics.
Telecommunications.
System Administration.
Scripting and Programming.
Management and Policy.
Training In Action.
Periodicals and Web Sites.
Case Study: Staying Current with Tools.
Conclusion.
14. Discovering DNS.
Normal Port 53 Traffic.
Suspicious Port 53 Traffic.
Malicious Port 53 Traffic.
Conclusion.
15. The Power of Session Data.
The Session Scenario.
Session Data from the Wireless Segment.
Session Data from the DMZ Segment.
Session Data from the VLANs.
Session Data from the External Segment.
Conclusion.
16. Packet Monkey Heaven.
Truncated TCP Options.
SCAN FIN.
Chained Covert Channels.
Conclusion.
V. THE INTRUDER VS. NSM OPERATIONS.
17. Tools to Attack NSM Operations.
Packit.
IP Sorcery.
Fragroute.
LFT.
Xprobe2.
Cisco IOS Denial of Service.
Solaris Sadmind Exploitation Attempt.
Microsoft RPC Exploitation.
Conclusion.
18. Tactics to Attack NSM Operations.
Promote Anonymity.
Evade Detection.
Appear Normal.
Degrade Or Deny Collection.
Self-Inflicted Problems.
Conclusion.
Epilogue: The Future of NSM.
Remote Packet Capture and Centralized Analysis.
Integration with Vulnerability Analysis Products.
Traffic Modeling and Anomaly Detection.
NSM Beyond the Gateway.
Conclusion.
APPENDICES.
A. Protocol Headers.
Ethernet Frames.
Address Resolution Protocol.
Internet Protocol.
Internet Control Message Protocol.
Transmission Control Protocol.
User Datagram Protocol.
B. NSM Intellectual History.
Foundation.
Sensor Architecture.
Packet Analysis.
Flow-Based Monitoring.
Alert-Centric Intrusion Detection.
Complimentary Technologies.
Researcher Home Pages.
Network Security Monitoring History First-Hand.
C. Protocol Anomaly Detection.
Index.
About the Author
Former military intelligence officer Richard Bejtlich is a security engineer
at ManTech International Corporation?s Computer Forensics and Intrusion Analysis
division. A recognized authority on computer security, he has extensive experience
with network security monitoring, incident response, and digital forensics.
Richard tests and writes documentation for Sguil, an open source GUI for the
Snort intrusion detection engine.
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