Page 176 - DCAP516_COMPUTER_SECURITY

Computer Security Manmohan Sharma, Lovely Professional University

Notes Unit 14: Intrusion Detection System and Secure E-mail

CONTENTS
Objectives
Introduction

14.1 Intruders
14.2 Intrusion Prevention System
14.3 Types of Intrusion Prevention System
14.3.1 Host-based
14.3.2 Network-based
14.3.3 Content-based
14.3.4 Rate-based

14.4 Requirements for Effective Prevention
14.5 Intrusion Detection System
14.5.1 Types of Intrusion Detection Systems
14.6 Electronic Mail (e-mail)
14.6.1 Functions of an e-mail
14.6.2 Architecture and Services
14.6.3 Message Formats
14.6.4 Ensuring Network Security
14.6.5 Mechanisms

14.6.6 Email Gateways
14.7 Summary
14.8 Keywords
14.9 Review Questions
14.10 Further Readings

Objectives

After studying this unit, you will be able to:

Understand what are Intruders and their types
Discuss the need and importance of intrusion prevention system
Describe the need and importance of intrusion detection system

Know about E-mail and security aspects relating to e-mail
Introduction

An organization’s initial response to experiencing the insecurity of internetworking is to place
firewalls on entry to their networks. Firewalls completely block access through which no traffic

170 LOVELY PROFESSIONAL UNIVERSITY