This book looks at network security in a new and refreshing way. It guides readers step-by-step through the "stack" -- the seven layers of a network. Each chapter focuses on one layer of the stack along with the attacks, vulnerabilities, and exploits that can be found at that layer. The book even includes a chapter on the mythical eighth layer: The people layer. This book is designed to offer readers a deeper understanding of many common vulnerabilities and the ways in which attacker’s exploit, manipulate, misuse, and abuse protocols and applications. The authors guide the readers through this process by using tools such as Ethereal (sniffer) and Snort (IDS). The sniffer is used to help readers understand how the protocols should work and what the various attacks are doing to break them. IDS is used to demonstrate the format of specific signatures and provide the reader with the skills needed to recognize and detect attacks when they occur. What makes this book unique is that it presents the material in a layer by layer approach which offers the readers a way to learn about exploits in a manner similar to which they most likely originally learned networking. This methodology makes this book a useful tool to not only security professionals but also for networking professionals, application programmers, and others. All of the primary protocols such as IP, ICMP, TCP are discussed but each from a security perspective. The authors convey the mindset of the attacker by examining how seemingly small flaws are often the catalyst of potential threats. The book considers the general kinds of things that may be monitored that would have alerted users of an attack.

Key Features

* Remember being a child and wanting to take something apart, like a phone, to see how it worked? This book is for you then as it details how specific hacker tools and techniques accomplish the things they do. * This book will not only give you knowledge of security tools but will provide you the ability to design more robust security solutions * Anyone can tell you what a tool does but this book shows you how the tool works


The book has a broader market than most pure hacking books. While pure hacking books focus exclusively on the security market, this book targets the information needed for IT security professionals, those involved in networking, programmers, and general IT specialists. There are many people in the world of IT that may not be full-time security professionals but have the need to understand security and apply it to their job. Anyone that has a basic understanding of networking and security concepts can gain from this book.

Table of Contents

  • Acknowledgments
  • Lead Author
  • Contributing Authors
  • Technical Editor
  • Foreword
  • Chapter 1: Extending OSI to Network Security
    • Introduction
    • Our Approach to This Book
    • Common Stack Attacks
    • Mapping OSI to TCP/IP
    • The Current State of IT Security
    • Using the Information in This Book
    • Summary
    • Solutions Fast Track
    • Frequently Asked Questions
  • Chapter 2: Layer 1: The Physical Layer
    • Introduction
    • Defending the Physical Layer
    • Attacking the Physical Layer
    • Layer 1 Security Project
    • Summary
    • Solutions Fast Track
    • Frequently Asked Questions
  • Chapter 3: Layer 2: The Data Link Layer
    • Introduction
    • Ethernet and the Data Link Layer
    • Understanding PPP and SLIP
    • Working with a Protocol Analyzer
    • Understanding How ARP Works
    • Attacking the Data Link Layer
    • Defending the Data Link Layer
    • Securing Your Network from Sniffers
    • Employing Detection Techniques
    • Data Link Layer Security Project
    • Using the Auditor Security Collection to Crack WEP
    • Summary
    • Solutions Fast Track
    • Frequently Asked Questions
  • Chapter 4: Layer 3: The Network Layer
    • Introduction
    • The IP Packet Structure
    • The ICMP Packet Structure
    • Attacking the Network Layer
    • Defending the Network Layer
    • Network Layer Security Project
    • Summary
    • Solutions Fast Track
    • Frequently Asked Questions
  • Chapter 5: Layer 4: The Transport Layer
    • Introduction
    • Connection-Oriented versus Connectionless Protocols
    • Protocols at the Transport Layer
    • The Hacker’s Perspective
    • Scanning the Network
    • Operating Syst


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© 2006
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