Home Network Security Simplified
| Home Network Security Simplified Jim Doherty Neil Anderson Illustrations by Nathan Clement Copyright© 2007 Cisco Systems, Inc. Published by: Cisco Press 800 East 96th Street Indianapolis, IN 46240 USA All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written permission from the publisher, except for the inclusion of brief quotations in a review. Printed in the United States of America 1 2 3 4 5 6 7 8 9 0 First Printing July 2006 Library of Congress Cataloging-in-Publication Data Doherty, Jim, CCNA. Home network security simplified / Jim Doherty and Neil Anderson. p. cm. Includes index. ISBN 1-58720-163-1 (pbk.) 1. Home computer networks--Security measures. I. Anderson, Neil, 1965- II. Title. TK5105.75.D638 2007 005.8--dc22 2006019633 Warning and Disclaimer
This book is designed to provide information about home network security. Every effort has been made to make this book as complete and as accurate as possible, but no warranty or fitness is implied. The information is provided on an "as is" basis. The authors, Cisco Press, and Cisco Systems, Inc. shall have neither liability nor responsibility to any person or entity with respect to any loss or damages arising from the information contained in this book or from the use of the discs or programs that may accompany it. The opinions expressed in this book belong to the author and are not necessarily those of Cisco Systems, Inc. Feedback Information
At Cisco Press, our goal is to create in-depth technical books of the highest quality and value. Each book is crafted with care and precision, undergoing rigorous development that involves the unique expertise of members from the professional technical community. Readers' feedback is a natural continuation of this process. If you have any comments regarding how we could improve the quality of this book, or otherwise alter it to better suit your needs, you can contact us through email at feedback@ciscopress.com. Please make sure to include the book title and ISBN in your message. We greatly appreciate your assistance. Trademark Acknowledgments
All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized. Cisco Press or Cisco Systems, Inc. cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark.
Corporate HeadquartersCisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA www.cisco.comTel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 European HeadquartersCisco Systems International BV Haarlerbergpark Haarlerbergweg 13-191101 CH Amsterdam The Netherlands www-europe.cisco.com Tel: 31 0 20 357 1000 Fax: 31 0 20 357 1100 Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA www.cisco.com Tel: 408 526-7660Fax: 408 527-0883 Asia Pacific Headquarters Cisco Systems, Inc.Capital Tower168 Robinson Road #22-01 to #29-01Singapore 068912www.cisco.com Tel: +65 6317 7777Fax: +65 6317 7799 Cisco Systems has more than 200 offices in the following countries and regions. Addresses, phone numbers, and fax numbers are listed on the Cisco.com Web site at www.cisco.com/go/offices. Argentina • Australia • Austria • Belgium • Brazil • Bulgaria • Canada • Chile • China PRC • Colombia • Costa Rica • Croatia • Czech Republic • Denmark • Dubai, UAE • Finland • France • Germany • Greece • Hong Kong SAR • Hungary • India • Indonesia • Ireland • Israel • Italy • Japan • Korea • Luxembourg • Malaysia • Mexico • The Netherlands • New Zealand • Norway • Peru • Philippines • Poland • Portugal • Puerto Rico • Romania • Russia • Saudi Arabia • Scotland • Singapore • Slovakia • Slovenia • South Africa • Spain • Sweden • Switzerland • Taiwan • Thailand • Turkey • Ukraine • United Kingdom • United States • Venezuela • Vietnam • Zimbabwe Copyright © 2003 Cisco Systems, Inc. All rights reserved. CCIP, CCSP, the Cisco Arrow logo, the Cisco Powered Network mark, the Cisco Systems Verified logo, Cisco Unity, Follow Me Browsing, FormShare, iQ Net Readiness Scorecard, Networking Academy, and ScriptShare are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, The Fastest Way to Increase Your Internet Quotient, and iQuick Study are service marks of Cisco Systems, Inc.; and Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, the Cisco IOS logo, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherSwitch, Fast Step, GigaStack, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, LightStream, MGX, MICA, the Networkers logo, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, RateMUX, Registrar, SlideCast, SMARTnet, StrataView Plus, Stratm, SwitchProbe, TeleRouter, TransPath, and VCO are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other countries. All other trademarks mentioned in this document or Web site are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0303R) Printed in the USA PublisherPaul Boger Cisco RepresentativeAnthony Wolfenden Cisco Press Program Manager Jeff Brady Senior Editor Elizabeth Peterson Managing EditorPatrick Kanouse Development Editor Andrew Cupp Senior Project Editor San Dee Phillips Project Editor Betsy Harris Copy Editor Keith Cline Technical Editors Doug Foster Bradley Mitchell Editorial AssistantVanessa Evans Cover DesignerLouisa Adair Book Designer and CompositorMark Shirar IndexerTim WrightProofreader Katherin Bidwell DedicationsI would like to dedicate this book to my parents, Jim Doherty and Pierrette Phillips. Dad, thanks for teaching me to be a good kid. Mom, thanks for sticking up for me when I wasn't. Jim I would like to dedicate this book to my parents. I am not exactly sure how, but my dad continues to live in the twenty-first century without touching a computer. That's one way to avoid online identity theft. And to my mom, who despite being the target of several computer viruses, still sees the value in home and business networking. Neil |