Home > Store

Defend I.T.: Security by Example

Register your product to gain access to bonus material or receive a coupon.

Defend I.T.: Security by Example


  • Sorry, this book is no longer in print.
Not for Sale


  • Copyright 2004
  • Edition: 1st
  • Book
  • ISBN-10: 0-321-19767-4
  • ISBN-13: 978-0-321-19767-2

"Ajay and Scott take an interesting approach in filling Defend I.T. with case studies and using them to demonstrate important security principles. This approach works well and is particularly valuable in the security space, where companies and consultants are often hesitant to discuss true security incidents for potential embarrassment and confidentiality reasons. Defend I.T. is full of engaging stories and is a good read."

--Fyodor, author of the Nmap Security Scanner and Insecure.Org

"Defend I.T. answers reader demand for scenario-driven examples. Security professionals will be able to look at these case studies and relate them to their own experiences. That sets this book apart."

--Lance Hayden, Cisco Systems

"This is an exciting book! It's like reading several mysteries at once from different viewpoints, with the added benefit of learning forensic procedures along the way. Readers will benefit from the procedures, and the entertaining presentation is a real plus."

--Elizabeth Zinkann, Equilink Consulting

The battle between IT professionals and those who use the Internet for destructive purposes is raging--and there is no end in sight. Reports of computer crime and incidents from the CERT Coordination Center at Carnegie Mellon University more than double each year and are expected to rise. Meanwhile, viruses and worms continue to take down organizations for days.

Defend I.T.: Security by Example draws on detailed war stories to identify what was done right and what was done wrong in actual computer-security attacks, giving you the opportunity to benefit from real experiences. Approaches to securing systems and networks vary widely from industry to industry and organization to organization. By examining a variety of real-life incidents companies are too embarrassed to publicly share, the authors explain what could have been done differently to avoid the losses incurred--whether creating a different process for incident response or having better security countermeasures in place to begin with.

Inside, you'll find in-depth case studies in a variety of categories:

  • Basic Hacking: Blackhat bootcamp, including mapping a network, exploiting vulnerable architecture, and launching denial-of-service attacks
  • Current Methods: The latest in malicious deeds, including attacks on wireless networks, viruses and worms, and compromised Web servers
  • Additional Items on the Plate: Often overlooked security measures such as developing a security policy, intrusion-detection systems, disaster recovery, and government regulations
  • Old School: Classic means of compromising networks--war dialing and social engineering
  • Forensics: How to investigate industrial espionage, financial fraud, and network intrusion

Aimed at both information-security professionals and network administrators, Defend I.T. shows you how to tap the best computer-security practices and industry standards to deter attacks and better defend networks.

Sample Content

Online Sample Chapter

The Role of Computer Forensics in Stopping Executive Fraud

Downloadable Sample Chapter

Download the Sample Chapter related to this title.

Table of Contents


About the Authors.



1. Getting to Know the Enemy: Nmap the Target Network.

Network Architecture.

Port Scans.

OS Identification.

Additional OS Identification Tools.

Partial Picture.


Lessons Learned.

2. Home Architecture.



The Incident.

The Monthly Bill.

The E-mail.

The Investigation.

The Disclosure.

The Investigation at REM.

Incident Reconstruction.


The Hacker.

Aspen's Response.

Lessons Learned.

Access Logs.

Responding to Changing Usage Patterns.

User Names and Passwords.


3. No Service for You!

The Discovery.

The Response.

The Process.

DoS Root Kit.

DDoS IRC Bots.

Lessons Learned.



4. Look, Ma, No Wires!



The Project.

Existing Security.


The End State.

5. Virus Outbreak I.


How Did You Get In?

How Much Have We Lost?

Lessons Learned.

6. Virus Outbreak II: The Worm.



The Worm Infection.


Plan of Attack.

Count Your Losses.

Lessons Learned.

System Backups.

Constant Monitoring.

Contingency Plans.

Corrective Actions.

7. Changing Face.


The Assessment.

Lessons Learned.

And What Did the Consultant Learn?


8. Protecting Borders: Perimeter Defense with an IDS.


The Company.

Developing Requirements.

Market Research.

Pilot Testing.

Test Plans.

Implementation on Production.

Implementation Follow-up.

Lessons Learned.

9. Disaster All Around.


Disaster Strikes.

Analyzing the Incident.

The Negatives.

The Positives.

The Solution.

IT Risk Assessment.

Agency Tasks.

Lessons Learned.

10. Security Is the Best Policy.


The Company.

The Call.

The Interviews.

Evaluating the Interviews.

The Initial Writing.

The Review Stage.

You Have a Policy . . . Now What?

Policy Awareness.

11. HIPAA: Security by Regulation.


The Assessment.

The Client.

The External Review.

The Internal Review.



The Solution.



12. A War-Dialing Attack.

War Dialing.

The Attack.

Lessons Learned.

Restricting Access.

Implementing User Privileges.

Maintaining Logs.

Creating a Demilitarized Zone.

Installing Digital Lines.

Placing Controls on Vendor Accounts.

13. A Low-Tech Path into the High-Tech World.


Doing Your Homework.

The Hack.

The Fallout.

Lessons Learned.


14. Industrial Espionage.

Spies All around Us.

The Investigation.

Acquire Evidence.

Authenticate the Evidence.

Analyze the Evidence.

Archive the Evidence.

Lessons Learned.

Intellectual Asset Protection.

Additional Intellectual Asset Considerations.

Chain of Custody.

Federal Guidelines of Computer Evidence Admissibility.

15. Executive Fraud.

Introduction: The Whistle-Blower.


The Nature and Source of the Allegation.

Evidence Collection and Chain of Custody.

Take Your Hands off That Keyboard and Slowly Back Away.

Drive Imaging.

Review of the Logical File Structure.

Review of Unallocated Space and File Slack.

Smoking Gun.


Lessons Learned.

16. Cyber Extortion.


To Press or Not to Press Charges.

The Investigation.

Acquire Evidence.

Authenticate the Evidence.

Analyze the Evidence.

Archive the Evidence and Results.

Lessons Learned.

What Would Be Done Differently Today?



Recommended Reading.


Download the Index file related to this title.


Submit Errata

More Information

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information

To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.


Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.


If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information

Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.


This site is not directed to children under the age of 13.


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information

If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information

Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents

California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure

Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact

Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice

We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020