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Firewalls For Dummies, 2nd Edition



Firewalls For Dummies, 2nd Edition

Brian Komar, Ronald Beekelaar, Joern Wettern

ISBN: 978-0-764-54428-6 September 2003 428 Pages

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What an amazing world we live in! Almost anything you can imagine can be researched, compared, admired, studied, and in many cases, bought, with the click of a mouse. The Internet has changed our lives, putting a world of opportunity before us. Unfortunately, it has also put a world of opportunity into the hands of those whose motives are less than honorable. A firewall, a piece of software or hardware that erects a barrier between your computer and those who might like to invade it, is one solution.

If you’ve been using the Internet for any length of time, you’ve probably received some unsavory and unsolicited e-mail. If you run a business, you may be worried about the security of your data and your customers’ privacy. At home, you want to protect your personal information from identity thieves and other shady characters. Firewalls For Dummies® will give you the lowdown on firewalls, then guide you through choosing, installing, and configuring one for your personal or bus iness network.

Firewalls For Dummies®  helps you understand what firewalls are, how they operate on different types of networks, what they can and can’t do, and how to pick a good one (it’s easier than identifying that perfect melon in the supermarket.) You’ll find out about

  • Developing security policies
  • Establishing rules for simple protocols
  • Detecting and responding to system intrusions
  • Setting up firewalls for SOHO or personal use
  • Creating demilitarized zones
  • Using Windows or Linux as a firewall
  • Configuring ZoneAlarm, BlackICE, and Norton personal firewalls
  • Installing and using ISA server and FireWall-1

With the handy tips and hints this book provides, you’ll find that firewalls are nothing to fear – that is, unless you’re a cyber-crook! You’ll soon be able to keep your data safer, protect your family’s privacy, and probably sleep better, too.


Part I: Introducing Firewall Basics.

Chapter 1: Why Do You Need a Firewall?

Chapter 2: IP Addressing and Other TCP/IP Basics.

Chapter 3: Understanding Firewall Basics.

Chapter 4: Understanding Firewall Not-So-Basics.

Chapter 5: “The Key Is under the Mat” and Other Common Attacks.

Part II: Establishing Rules.

Chapter 6: Developing Policies.

Chapter 7: Establishing Rules for Simple Protocols.

Chapter 8: Designing Advanced Protocol Rules.

Chapter 9: Configuring “Employees Only” and Other Specific Rules.

Part III: Designing Network Configurations.

Chapter 10: Setting Up Firewalls for SOHO or Personal Use.

Chapter 11: Creating Demilitarized Zones with a Single Firewall.

Chapter 12: Designing Demilitarized Zones with Multiple Firewalls.

Part IV: Deploying Solutions Using Firewall Products.

Chapter 13: Using Windows as a Firewall.

Chapter 14: Configuring Linux as a Firewall.

Chapter 15: Configuring Personal Firewalls: ZoneAlarm, BlackICE, and Norton Personal Firewall.

Chapter 16: Microsoft’s Firewall: Internet Security and Acceleration Server.

Chapter 17: The Champ: Check Point FireWall-1 Next Generation.

Chapter 18: Choosing a Firewall That Meets Your Needs.

Part V: The Part of Tens.

Chapter 19: Ten Tools You Can’t Do Without.

Chapter 20: Ten Web Sites to Visit.

Appendix: Protocol Listings and More.