Firewall Fundamentals, 1st edition
Published by Cisco Press (June 2nd 2006) - Copyright © 2006
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The essential guide to understanding and using firewalls to protect personal computers and your network
- An easy-to-read introduction to the most commonly deployed network security device
- Understand the threats firewalls are designed to protect against
- Learn basic firewall architectures, practical deployment scenarios, and common management and troubleshooting tasks
- Includes configuration, deployment, and management checklists
Increasing reliance on the Internet in both work and home environments has radically increased the vulnerability of computing systems to attack from a wide variety of threats. Firewall technology continues to be the most prevalent form of protection against existing and new threats to computers and networks. A full understanding of what firewalls can do, how they can be deployed to maximum effect, and the differences among firewall types can make the difference between continued network integrity and complete network or computer failure. Firewall Fundamentals introduces readers to firewall concepts and explores various commercial and open source firewall implementations--including Cisco, Linksys, and Linux--allowing network administrators and small office/home office computer users to effectively choose and configure their devices. Firewall Fundamentals is written in clear and easy-to-understand language and helps novice users understand what firewalls are and how and where they are used. It introduces various types of firewalls, first conceptually and then by explaining how different firewall implementations actually work. It also provides numerous implementation examples, demonstrating the use of firewalls in both personal and business-related scenarios, and explains how a firewall should be installed and configured. Additionally, generic firewall troubleshooting methodologies and common management tasks are clearly defined and explained.
Table of contents
Part 1 Introduction to Firewalls3
Chapter 1 Introduction to Firewalls
What Is a Firewall?
What Can Firewalls Do?
Firewalls Manage and Control Network Traffic
Firewalls Authenticate Access
Firewalls Act as an Intermediary
Firewalls Protect Resources
Firewalls Record and Report on Events
What Are the Threats?
Targeted Versus Untargeted Attacks
Viruses, Worms, and Trojans
Malicious Content and Malware
Denial of Service
Compromise of Personal Information and Spyware
New Attack Vectors
Insecure/Poorly Designed Applications
What Are the Motives?
Examples of Security Policies
Firewalls and Trust
Determining If You Need a Firewall
Chapter 2 Firewall Basics
Open and Closed Source Firewalls
Chapter 3 TCP/IP for Firewalls
Protocols, Services, and Applications
The OSI Model
The Department of Defense (DoD) Model
How Firewalls Use Protocols, Applications, and Services
Internet Protocol (IP)
IP Packet Structure
The IP Packet Header
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