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Hacking Wireless Networks FOR A Reference Restof Us!

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LIMIT OF LIABILITY/DISCLAIMER OF WARRANTY : THE PUBLISHER AND THE AUTHOR MAKE NO REP- RESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CON- TENTS OF THIS WORK AND SPECIFICALLY DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE.

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In addition, Kevin's information-security work has been published in Information Security Magazine, Security Focus.com, and

Kevin is an information-security instructor for the Southeast Cybercrime Institute, and frequently speaks on information security at various conferences for CSI, Tech Target, IIA, Secure World Expo, and the Cybercrime Summit.

56 Picking Your Transceiver 57 Determining your chipset 57 Buying a wireless NIC 59 Extending Your Range 59 Using GPS 62 Signal Jamming 63 Part 11: Getting Rolling With Common Wi-Fi Hacks 65 Chapter 5: Human (In)Security 67 What Can Happen 68 Ignoring the Issues 69 Table of Contents tff Social Engineering 70 Passive tests 71 Active tests 73 Unauthorized Equipment 74 Default Settings 76 Weak Passwords 77 Human (In)Security Countermeasures 78 Enforce a wireless security policy 78 Train and educate 79 Keep people in the know 79 Scan for unauthorized equipment 80 Secure your systems from the start 80 Chapter 6: Containing the Airwaves 81 Signal Strength 81 Using Linux Wireless Extension and Wireless Tools 81 Using Wavemon 87 Using Wscan 88 Using Wmap 88 Using XNetwork Strength 88 Using Wimon 88 Other link monitors 88 Network Physical Security Countermeasures 90 Checking for unauthorized users 90 Antenna type 91 Adjusting your signal strength 94 Chapter 7: Hacking Wireless Clients 97 What Can Happen 98 Probing for Pleasure 99 Port scanning 99 Using VPNMonitor 102 Looking for General Client Vulnerabilities 103 Common AP weaknesses 104 Linux application mapping 105 Windows null sessions 106 Ferreting Out WEP Keys 109 Wireless Client Countermeasures Ill Chapter 8: Discovering Default Settings 113 Collecting Information 113 Are you for Ethereal?

113 This is Air Traf control, you are cleared to sniff 114 Let me Airo Peek at your data 114 Another Comm View of your data 115 Gulpit 117 That's Mognet not magnet 119 Other analyzers 119 J^ff Hacking Wireless Networks For Dummies Cracking Passwords 120 Using Cain & Abel 120 Using dsniff 124 Gathering IP Addresses 125 Gathering SSIDs 126 Using essidjack 127 Using SSIDsniff 128 Default-Setting Countermeasures 128 Change SSIDs 128 Don't broadcast SSIDs 129 Using pong 129 Detecting sniffers 129 Chapter 9: Wardriving 131 Introducing Wardriving 131 Installing and Running Net Stumbler 133 Setting Up Net Stumbler 134 Interpreting the Results 141 Mapping Your Stumbling 148 Using Stumb Verter and Map Point 149 Using Microsoft Streets & Trips 150 Using Di GLE 151 Part 111: Advanced Wi-Fi Hacks 153 Chapter 10: Still at War 155 Using Advanced Wardriving Software 155 Installing and using Kismet 156 Installing and using Wellenreiter 167 Using War Linux 168 Installing and using Mini Stumbler 170 Using other wardriving software 173 Organization Wardriving Countermeasures 174 Using Kismet 174 Disabling probe responses 175 Increasing beacon broadcast intervals 175 Fake 'em out with a honeypot 175 Chapter 11: Unauthorized Wireless Devices 177 What Can Happen 178 Wireless System Configurations 179 Characteristics of Unauthorized Systems 181 Wireless Client Software 184 Stumbling Software 186 Table of Contents tff f / Network-Analysis Software 188 Browsing the network 188 Probing further 191 Additional Software Options 193 Online Databases 193 Unauthorized System Countermeasures 193 Chapter 12: Network Attacks 195 What Can Happen 196 MAC-Address Spoofing 197 Changing your MAC in Linux 198 Tweaking your Windows settings 199 SMAC'ing your address 203 A walk down MAC-Spoofing Lane 204 Who's that Man in the Middle?Thanks, appreciation, and lots of love to Mom and Dad for all the values and common sense you instilled in me long ago. Finally, to my dear wife Amy for all her support during this book. and Larry Simon for responding to a request for wireless infor- mation. And a really big shout-out to John Selmys and Danny Roy for their efforts. (Come on guys, the Raptors don't quite fill the void.) A special thanks to Janet and Kelly for allowing Peter to work on the book as they painted the family room. TECHBOOKS Production Services Indexer: TECHBOOKS Production Services Publisher's Acknowledgments We're proud of this book; please send us your comments through our online registration form located at Corder, Editorial Director Publishing for Consumer Dummies Diane Graves Steele, Vice President and Publisher Joyce Pepple, Acquisitions Director Composition Services Gerry Fahey, Vice President of Production Services Debbie Stailey, Director of Composition Services Contents at a Glance Foreword xtfii Introduction / Part 1: Building the Foundation for Testing Wireless Networks 7 Chapter 1: Introduction to Wireless Hacking 9 Chapter 2: The Wireless Hacking Process 19 Chapter 3: Implementing a Testing Methodology 31 Chapter 4: Amassing Your War Chest 43 Part 11: Getting Rolling With Common Wi-Fi Hacks 65 Chapter 5: Human (In)Security 67 Chapter 6: Containing the Airwaves 81 Chapter 7: Hacking Wireless Clients 97 Chapter 8: Discovering Default Settings 113 Chapter 9: Wardriving 131 Part 111: Advanced Wi-Fi Hacks 153 Chapter 10: Still at War 155 Chapter 11: Unauthorized Wireless Devices 177 Chapter 12: Network Attacks 195 Chapter 13: Denial-of-Service Attacks 225 Chapter 14: Cracking Encryption 255 Chapter 15: Authenticating Users 281 Part IV: The Part of Tens 301 Chapter 16: Ten Essential Tools for Hacking Wireless Networks 303 Chapter 17: Ten Wireless Security-Testing Mistakes 307 Chapter 18: Ten Tips for Following Up after Your Testing 321 Part V: Appendixes 325 Appendix A: Wireless Hacking Resources 327 Appendix B: Glossary of Acronyms 341 Index 347 Table of Contents Foreword pfii Introduction 1 Who Should Read This Book?2 About This Book 2 How to Use This Book 2 Foolish Assumptions 3 How This Book Is Organized 3 Part I: Building the Foundation for Testing Wireless Networks 4 Part II: Getting Rolling with Common Wi-Fi Hacks 4 Part III: Advanced Wi-Fi Hacks 4 Part IV: The Part of Tens 5 Part V: Appendixes 5 Icons Used in This Book 5 Where to Go from Here 6 Part 1: Building the Foundation for Testing Wireless Networks 7 Chapter 1: Introduction to Wireless Hacking 9 Why You Need to Test Your Wireless Systems 10 Knowing the dangers your systems face 11 Understanding the enemy 12 Wireless-network complexities 14 Getting Your Ducks in a Row 15 Gathering the Right Tools 16 To Protect, You Must Inspect 17 Non-technical attacks 17 Network attacks 18 Software attacks 18 Chapter 2: The Wireless Hacking Process 19 Obeying the Ten Commandments of Ethical Hacking 19 Thou shalt set thy goals 20 Thou shalt plan thy work, lest thou go off course 21 Thou shalt obtain permission 21 Thou shalt work ethically 22 Thou shalt keep records 22 ^ Hacking Wireless Networks For Dummies Thou shalt respect the privacy of others 23 Thou shalt do no harm 23 Thou shalt use a "scientific" process 24 Thou shalt not covet thy neighbor's tools 24 Thou shalt report all thy findings 25 Understanding Standards 26 Using ISO 17799 26 Using Cobi T 27 Using SSE-CMM 27 Using ISSAF 27 Using OSSTMM 28 Chapter 3: Implementing a Testing Methodology 31 Determining What Others Know 32 What you should look for 32 Footprinting: Gathering what's in the public eye 33 Mapping Your Network 35 Scanning Your Systems 37 Determining More about What's Running 39 Performing a Vulnerability Assessment 39 Manual assessment 40 Automatic assessment 40 Finding more information 41 Penetrating the System 41 Chapter 4: Amassing Your War Chest 43 Choosing Your Hardware 44 The personal digital assistant 44 The portable or laptop 44 Hacking Software 45 Using software emulators 45 Linux distributions on CD 55 Stumbling tools 56 You got the sniffers?Hacking Wireless Networks For Dummies 1 Published by Wiley Publishing, Inc. Requests to the Publisher for permission should be addressed to the Legal Department, Wiley Publishing, Inc., 10475 Crosspoint Blvd., Indianapolis, IN 46256, (317) 572-3447, fax (317) 572-4355, or online at http : // , The Dummies Way, Dummies Daily, The Fun and Easy Way, Dummies.com, and related trade dress are trademarks or registered trademarks of John Wiley & Sons, Inc.and/or its affiliates in the United States and other countries, and may not be used without written permission.Also, many thanks to Devin Akin with Planet3 Wireless for writing the fore- word.

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