Network Security Fundamentals [Electronic resources] نسخه متنی

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Network Security Fundamentals [Electronic resources] - نسخه متنی

Gert De Laet, Gert Schauwers

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Acknowledgments

Icons Used in This Book

Command Syntax Conventions

Foreword

Introduction

Part I. Introduction

Chapter 1. Network Security Overview

Defining Trust

Weaknesses and Vulnerabilities

Responsibilities for Network Security

Security Objectives

Conclusion

Q&A

Chapter 2. Understanding VulnerabilitiesThe Need for Security

Risk and Vulnerability

TCP/IP Suite Weaknesses

Buffer Overflows

Spoofing Techniques

Social Engineering

Conclusion

Q&A

Chapter 3. Understanding Defenses

Digital IDs

Intrusion Detection System

PC CardBased Solutions

Physical Security

Encrypted Login

Firewalls

Reusable Passwords

Antivirus Software

Encrypted Files

Biometrics

Conclusion

Q&A

Part II. Building Blocks

Chapter 4. Cryptography

Cryptography versus Cryptanalysis

Modern-Day Techniques

Conclusion

Q&A

Chapter 5. Security Policies

Defining a Security Policy?

Importance of a Security Policy

Development Process

Incident Handling Process

Security Wheel

Sample Security Policy

Conclusion

Q&A

Chapter 6. Secure Design

Network DesignPrinciples

Network DesignMethodology

Return on Investment

Physical Security Issues

Switches and Hubs

Conclusion

Q&A

Part III. Tools and Techniques

Chapter 7. Web Security

Hardening

Case Study

Conclusion

Q&A

Chapter 8. Router Security

Basic Router Security

Router Security to Protect the Network

CBAC

Case Study

Conclusion

Q&A

References in This Chapter

Chapter 9. Firewalls

Firewall Basics

Different Types of Firewalls

Enhancements for Firewalls

Case Study: Placing Filtering Routers and Firewalls

Summary

Q&A

Chapter 10. Intrusion Detection System Concepts

Introduction to Intrusion Detection

Host-Based IDSs

Network-Based IDSs

IDS Management CommunicationsMonitoring the Network

Sensor Maintenance

Case Study: Deployment of IDS Sensors in the Organization and Their Typical Placement

Conclusion

Q&A

Chapter 11. Remote Access

AAA Model

AAA Servers

Lock-and-Key Feature

Two-Factor Identification

Case Study: Configuring Secure Remote Access

Summary

Q&A

Chapter 12. Virtual Private Networks

Generic Routing Encapsulation Tunnels

IP Security

VPNs with IPSec

Case Study: Remote Access VPN

Conclusion

Q&A

Chapter 13. Public Key Infrastructure

Public Key Distribution

Trusted Third Party

PKI Topology

Enrollment Procedure

Revocation Procedure

Case Study: Creating Your Own CA

Conclusion

Q&A

Chapter 14. Wireless Security

Different WLAN Configurations

What Is a WLAN?

How Wireless Works

Risks of Open Wireless Ports

War-Driving and War-Chalking

SAFE WLAN Design Techniques and Considerations

Case Study: Adding Wireless Solutions to a Secure Network

Conclusion

Q&A

Chapter 15. Logging and Auditing

Logging

SYSLOG

Simple Network Management Protocol

Remote Monitoring

Service Assurance Agent

Case Study

Conclusion

Q&A

Part IV. Appendixes

Appendix A. SAFE Blueprint

Introduction to the SAFE Blueprint

SAFE Blueprint: Overview of the Architecture

Summary

References in This Appendix

Appendix B. SANS Policies

SANS Overview

SANS Initiatives and Programs

Security Policy Project

Is It a Policy, a Standard, or a Guideline?

References in This Appendix

Appendix C. NSA Guidelines

Security Guides

References in This Appendix

Appendix D. Answers to Chapter Q&A

Chapter 1 Q&A

Chapter 2 Q&A

Chapter 3 Q&A

Chapter 4 Q&A

Chapter 5 Q&A

Chapter 6 Q&A

Chapter 7 Q&A

Chapter 8 Q&A

Chapter 9 Q&A

Chapter 10 Q&A

Chapter 11 Q&A

Chapter 12 Q&A

Chapter 13 Q&A

Chapter 14 Q&A

Chapter 15 Q&A

Bibliography

Books

Website References

Index
توضیحات
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Chapter 10. Intrusion Detection System Concepts


On completing this chapter, you will be able to

  • Explain the main differences between the various IDSs

  • Describe host-based IDSs in detail

  • Describe network-based IDSs in detail

  • Explain how IDS management communication works

  • Describe IDS tuning

  • Explain how IDS maintenance works


This chapter builds on the introductory discussions of intrusion detection systems (IDSs) presented in Chapter 3, "Understanding Defenses." This chapter delves into IDS concepts, uses, applications, and limitations. After the introduction to IDSs, their deployment and analysis are discussed in more detail. The concluding case study is a practical example of how organizations can inspect and monitor overall network activity using IDSs to protect their assets.

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