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| Extrusion Detection: Security Monitoring for Internal Intrusions | 
| Author: Richard Bejtlich
Publisher: Addison-Wesley Professional
Category: Book
List Price: $54.99
Buy New: $5.69
You Save: $49.30 (90%)
Buy New/Used from $4.84
Avg. Customer Rating:  (8 reviews)
Sales Rank: 237492
Media: Paperback
Number Of Items: 1
Pages: 416
Shipping Weight (lbs): 1.6
Dimensions (in): 9.1 x 6.9 x 1.1
ISBN: 0321349962
Dewey Decimal Number: 005.8
EAN: 9780321349965
ASIN: 0321349962
Publication Date: November 18, 2005
Availability: Usually ships in 1-2 business days
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| Editorial Reviews:
Product Description
Overcome Your Fastest-Growing Security Problem: Internal, Client-Based Attacks Today's most devastating security attacks are launched from within the company, by intruders who have compromised your users' Web browsers, e-mail and chat clients, and other Internet-connected software. Hardening your network perimeter won't solve this problem. You must systematically protect client software and monitor the traffic it generates. Extrusion Detection is a comprehensive guide to preventing, detecting, and mitigating security breaches from the inside out. Top security consultant Richard Bejtlich offers clear, easy-to-understand explanations of today's client-based threats and effective, step-by-step solutions, demonstrated against real traffic and data. You will learn how to assess threats from internal clients, instrument networks to detect anomalies in outgoing traffic, architect networks to resist internal attacks, and respond effectively when attacks occur. Bejtlich's The Tao of Network Security Monitoring earned acclaim as the definitive guide to overcoming external threats.Now, in Extrusion Detection, he brings the same level of insight to defending against today's rapidly emerging internal threats. Whether you're an architect, analyst, engineer, administrator, or IT manager, you face a new generation of security risks. Get this book and protect yourself. Coverage includes *Architecting defensible networks with pervasive awareness: theory, techniques, and tools *Defending against malicious sites, Internet Explorer exploitations, bots, Trojans, worms, and more *Dissecting session and full-content data to reveal unauthorized activity *Implementing effective Layer 3 network access control *Responding to internal attacks, including step-by-step network forensics *Assessing your network's current ability to resist internal attacks *Setting reasonable corporate access policies *Detailed case studies, including the discovery of internal and IRC-based bot nets *Advanced extrusion detection: from data collection to host and vulnerability enumeration About the Web Site Get book updates and network security news at Richard Bejtlich's popular blog, taosecurity.blogspot.com, and his Web site, www.bejtlich.net.
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| Customer Reviews: Read 3 more reviews...
 super March 8, 2007
Thanks a lot, we are very happy to have this book in our library!
 I learned a lot November 15, 2006
0 out of 1 found this review helpful
This is a solid book and a detailed read. I was on the fence about giving it 4 or 5 stars; if I could I'd give it 4.5. While it didn't blow my socks off, I would suggest it to anybody interested in security monitoring in general. In terms of monitoring internal threats specifically it also has some useful information.
Excellent Book July 20, 2006
0 out of 1 found this review helpful
Richard Bejtlich done great job again. Tao of Network security and this one are best companion. Well written. Extrusion topic is mostly companies preferred to spend budget or time and ignore. Although NSM methodologies are repeated but fun to read again. Traffic threat assessment, designing defensive network, and incident response are well written,
Excellent Book! July 15, 2006
1 out of 1 found this review helpful
I have had the pleasure of reading Extrusion Detection: Security Monitoring for Internal Intrusions by Richard Bejtlich. Richard Bejtlich picks up where he last left off with his first book Tao of Network Security Monitor: Beyond Intrusion Detection. His new book deals with a subject that many businesses don't wish to think about, and what over 50% of attacks come from, Security breaches that come from the inside an organization. It is very unfortunate that this fact was not taken into consideration in Microsoft's XP SP2 firewall.
Richard starts with a short review of network definitions. One concept I really like is the Defensible Network which he states is not necessarily a secure network, "quite accurate".
Richard includes a listing networking monitoring tools with where you can go to obtain them; Full Content Data, Session Data, and Statistical.
This book includes good illustrations, explained pieces of code (more toward the second half of the book), and includes pictures of familiar hardware.
A new definition for me was "the sink hole", that redirects unknown traffic away from the customers.
This book is a good read and a very good book to keep in one's reference library. I will be obtaining Richard Bejtlich's Tao of Network Security Monitor: Beyond Intrusion Detection and I suspect this will be just as good.
nice usages of a sink hole April 5, 2006
5 out of 5 found this review helpful
This book is a fine complement to Bejtlich's Tao of Network Security Monitoring. At first, one might think there would be considerable overlap between the two. After all, both concern crackers attacking a company's network that sits on the Internet. Yet the author takes pains to point out key differences. Tao was about an external attacker going at your servers, where these might be web or database [or other types of] servers.
The current text describes a qualitatively different game. Where a typical scenario might be one of your users, at her machine which is inside your network, surfing the Web. An attacker might try to target bugs in her browser, in order to install malware on her machine. This malware might then surveil that machine and others on the network, and hence ring home to the attacker's website. So extrusion detection involves at the very least defending your client machines, instead of your servers.
Bejtlich gives detailed examples of how to use various tools, typically open source, to monitor your internal traffic, looking for tell tale signs of extrusion.
Along the way, there is a nice description of two ways to use a sink hole. One is by an ISP, who is facing a Denial of Service attack against one of its customer's addresses. For this, a sink hole can be configured to divert those incoming packets, and protect the ISP's other customers. In a recent book, "Internet Denial of Service" by Mirkovic et al, various anti-DoS methods were cited, and this usage of a sink hole is an excellent example of another such method. While DoS is not an internal attack, it is still a very serious problem, and it is helpful to see a clear description of how to use a sink hole against it.
The other method of using a sink hole involves configuring it to attract traffic from internal machines that have been subverted. Here, this is entirely in keeping with the book's remit.
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