Free Ebook How Secure is Your Wireless Network? Safeguarding Your Wi-Fi LAN By Lee Barken

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How Secure is Your Wireless Network? Safeguarding Your Wi-Fi LAN By Lee Barken

Free Ebook How Secure is Your Wireless Network? Safeguarding Your Wi-Fi LAN By Lee Barken

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Sales Rank: #4839823 in Books
Published on: 2003-09-05
Original language: English
Number of items: 1
Dimensions: 9.40" h x .60" w x 6.90" l, .98 pounds
Binding: Paperback
224 pages

From the Back Cover

Now you can have the awesome benefits of wireless LANswithout falling victim to their notorious security flaws. Leadingwireless security expert Lee Barken shows you practicalworkarounds and fixes for the vulnerabilities in today'sWLANs, introduces high-security wireless protocols new to themarketplace, and offers step-by-step instructions for protectingall your wireless information, from the home to the enterprise.This is the definitive and easy-to-use WLAN security book you'vebeen searching for--whether you're a network administrator,security specialist, manager, or home user.

Topics covered include--

Why conventional wireless LANs are so insecure--and what you can do about it
"Wardriving" software, equipment, and techniques: knowing your enemy
802.11i, WPA, TKIP, and AES: the new wireless security options
802.1x and EAP: enabling port-based authentication on your WLAN
Safely connecting WLANs to wired networks
Securing home and small office environments, one step at a time
Accessing VPNs from wireless devices
Integrating firewalls and wireless access points
Improving security in public access environments
Securing enterprise environments with 802.1x--a start-to-finish walkthrough

About the Author

LEE BARKEN, CISSP, CCNA, MCP, CPA, has been in the IT industry since 1987. He has worked as anIT consultant and network security specialist for Ernst and Young's Information Technology RiskManagement (ITRM) practice and KPMG's Risk and Advisory Services (RAS) practice. He co-foundedthe San Diego Wireless Users Group and writes and speaks on the topic of wireless LANtechnology and security. He is the technical editor for Mobile Business Advisor Magazine, andteaches Wireless LAN Security and Deployment classes for the University of California at SanDiego (UCSD) extension.

Excerpt. © Reprinted by permission. All rights reserved.
Introduction

How Secure is Your Wireless Network? is a book about taking the next step and securing yourwireless network. Announcements by major companies backing wireless technologies are settingthe stage for wide-scale deployments and the ushering in a new era of wireless freedom.Companies like Intel have announced the Centrino chipset that will integrate 802.11functionality into their products. Dell, Gateway, IBM and others have announced initiatives tointegrate wireless technology into their laptops. T-Mobile, Boingo, Wayport and dozens ofothers have deployed hotspots in Starbucks, Borders, and Kinkos locations as well as hotels,airports and other public venues across the world. Almost every University has deployed somekind of wireless initiatives, with high schools and elementary schools following in theirfootsteps. Millions of home users have discovered the joys of wireless networking. Nowbusinesses everywhere are getting on board as well.

The bottom line is that wireless is here to stay. The integration of 802.11 into almost allnew laptops and handheld devices, coupled with the explosion in availability of public hotspotshas created a virtuous cycle of large-scale wireless proliferation. This invisible, yetinescapable flood of radio waves has landed squarely in our homes and businesses where itpresents a whole new security challenge. How do we embrace the joys of wireless networks whilewe maintain an essential balance with the security needs of our organization?

This book is all about understanding the technology, recognizing the security risks andimplementing a responsible and realistic game plan for safe and secure wireless communication.

Why I Wrote This Book

Although I had seen many demonstrations of wireless networks, it wasn't until the summer of2001, that I found my true inspiration. At a large security conference, after listening tospeakers talk about community wireless networks, WLAN security and other wireless topics, Icame back home energized and decided it was time to put that spirit to work. A few weeks later,I started the San Diego Wireless Users Group with some friends and found my new passion inwireless technology. With the help of countless dedicated volunteers, including Alan Koebrick,John Eder, Eric Bermel, Michael Mee, and others, we hold monthly meetings with presentations ona variety of topics to share our passion for learning, meet likeminded wireless enthusiasts andhelp one other learn more about this wonderful technology. I've always enjoyed being a "tinkerer," eager to learn how things work.I was the kid who took apart the radio (or telephone, or video game) to check out the parts andunderstand how something operated. Wireless LANs were no different. Fundamentally, if you wantto develop a genuine appreciation for the security risks of wireless networks, you have to rollup your sleeves, get some wireless components together and play.

I wrote this book to go beyond the "WEP is bad" headlines and dig a little deeper tounderstand exactly what was happening under the hood and what to do about it.

Organization

The journey of How Secure is Your Wireless Network? begins with an introduction to wirelesssecurity including a detailed review of the risks and attacks. Next, we move into a tour of thenative 802.11 security solutions. Finally, we explore a variety of hands-on deploymentsolutions.

Here is an overview of each chapter--

Chapter 1 is a review of the general wireless landscape. We begin to ask some of the keyquestions that will lay a foundation for the rest of the book. In particular, we look at howsecurity decisions are affected by factors such as deployment size, mobility needs and othersecurity design requirements. We also review SSID broadcasts, MAC filtering, and Shared KeyAuthentication.

Chapter 2 starts with a stroll down memory lane as we outline some of the history of the802.11 protocol including 802.11 (1997), Direct Sequence Spread Spectrum (DSSS), and FrequencyHopping Spread Spectrum (FHSS). We take a look at 802.11 a, b and g and some of theirperformance characteristics. Next, we dig deeper into the 802.11 protocol with a review ofarchitecture topologies ("Infrastructure" and "Ad-Hoc" modes) as well as CSMA/CA, RTS/CTS andFragmentation.

Chapter 3 is where we jump into a detailed review of WEP and its vulnerabilities. Thisincludes a description and explanation of all known WEP attacks.

Chapter 4 describes "War Driving," including all of the hardware, software, tools and techniques so you can understand how to discover Access Points on your own. We include adiscussion of War Chalking and the ethical considerations of War Driving.

Chapter 5 discusses 802.11i, WPA, TKIP and AES. In this Chapter, we dig a little deeperinto WEP vulnerabilities and ways in which we can mitigate the risk with newer technologies.This includes a description of new encryption methods such as TKIP, AES and other 802.11igoodies.

Chapter 6 follows up on Chapter 5 with a detailed analysis of how 802.1x works, as well asa review of popular EAP types and guidelines to help you choose which one is best for yourparticular situation.

Chapter 7 focuses on transitioning between the "under the hood" theme in the first half ofthe book, into the "hands-on" theme of the second half of the book. In this Chapter we discussthe basic security architecture considerations when connecting the WLAN to the wired networkand moving from theory to application.

Chapter 8 discusses VPNs, a comparison of various technologies and a step-by-stepdescription of how to implement a Microsoft VPN solution.

Chapter 9 talks about securing home environments. It includes a step-by-step guide tobuilding a Linux Embedded Appliance Firewall (LEAF), Sputnik and ReefEdge's Dolphin.

Chapter 10 revisits 802.1x and discusses security in an enterprise environment. Thestep-by-step instructions describe how to deploy 802.1x using Microsoft as a Supplicant andAuthentication Server, with a Cisco AP as the Authenticator.

In Chapter 11 we review 802.11 in a public hotspot environment. For our step-by-stepproject, we describe how to build a Linux based AP using HostAP, NoCat and LEAF.

Appendix A offers an introdcution to RF. Appendix B discusses various 802.11 frame types.Appendix C gives a detailed overview of community wireless networking. And finally, in AppendixD, you'll find detailed instructions, with illustrations, on how to build a working wirelessantenna out of a cylindrical potato-chip can.

Thank you for choosing this book.

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