Jeff Duntemann's Drive-By Wi-Fi Guide

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Format: Paperback
Pub. Date: 2003-04-01
Publisher(s): Oreilly & Associates Inc
List Price: $31.49

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Summary

Provides everything Wi-Fi users need to know to design, build, protect, and extend a Wi-Fi wireless network! In this book, legendary tech teacher, wireless expert, and best-selling author Jeff Duntemann explains how to make Wi-Fi really work. Easy and economical hands-on projects allow readers to boost power with a variety of common household items, which make this book a true standout.

Table of Contents

Part I Making Connections by Cutting the Cables
Wi--Fi: What, Why, Where, Who, and How?
3(18)
What I'm Up To
4(1)
A Drive-By Wi-Fi Overview
5(6)
Why ``Wi-Fi?''
7(1)
IEEE 802.11: How It Came About
7(1)
The Magic of (IEEE) Numbers
8(1)
The 802 Standard
9(1)
Apple Pioneers Consumer Wi-Fi
10(1)
Internet Connection Sharing
11(1)
Sharing Printers and Other Wi-Fi Gadgetry
12(1)
How Fast? Bit Rate vs. Throughput
13(2)
Roaming
15(1)
Is Wi-Fi Effective on PDA's?
16(1)
The 2.4 GHz ISM (Industrial, Scientific, & Medical) Band
16(3)
How Products Become Wi-Fi Certified
19(1)
Wi-Fi5 and Logo Confusion
19(1)
It's About Connections
20(1)
Networking, Ethernet-Style
21(20)
Networking from Square One
22(1)
The Ether Vibrates
22(6)
Better Wires: Category 5
24(2)
A Change in Topology
26(2)
Bogging Down on Bandwidth: Switching to Switched
28(2)
Switches, Ports, and Addresses
30(3)
Media Access Control (MAC) Addresses
31(2)
Switches vs. Routers
33(3)
Mixing Switches and Hubs
34(2)
From Wires to Wireless
36(3)
Just Like Ol' Grand-Dad: Ad-Hoc Mode
37(2)
The Missing Ingredient
39(2)
Your Net and the Internet
41(24)
A Network of Networks
42(3)
Backbones and Interstates
43(1)
Networks within Networks
44(1)
Your Place on the Internet
45(1)
IP and TCP/IP
46(11)
IP Addresses
47(2)
IP Addresses and TCP Ports
49(1)
How to Determine Your IP Address
50(1)
Running out of IP Addresses
50(2)
Static vs. Dynamic IP Addresses
52(1)
DHCP and Dynamic IP Addresses
52(1)
Local IP Addresses
53(1)
Network Address Translation (NAT) and Home Office Routers
54(3)
Firewalls
57(2)
Default Gateways
59(1)
Subnet Masks
60(3)
When Routers and Access Points Fight
60(3)
APIPA: IP without DHCP
63(1)
Barely Scratching the Surface
64(1)
Designing Your Wi-Fi Network
65(20)
Getting Started
66(2)
Sketching Network Usage Patterns
67(1)
The 85% Design for Very Simple Home Networks
68(1)
Choosing a Wireless Technology
69(13)
Weighing 802.11 a vs. b
70(3)
What About 802.11b+?
73(2)
One Access Point or Several?
75(1)
Basic Service Set (BSS) vs. Extended Service Set (ESS)
76(3)
ESS Networks and Roaming
79(1)
Positioning Access Points
80(2)
As Design Bleeds Into Implementation
82(3)
Wi-Fi Communities
85(24)
Spontaneous Community: Ad-Hoc Networks
86(4)
An Ad-Hoc Scenario: A Family Genealogy Meeting
87(1)
How to Create an Ad-Hoc Network
87(2)
The Curse of the Ad-Hoc People
89(1)
The Dream of Community Hotspots
90(6)
The ``Last Mile'' Problem
90(1)
ISPs and Connection Sharing
91(2)
Bandwidth Caps
93(1)
The Tragedy of the Commons
94(2)
Captive Portals
96(4)
What a User Sees
97(1)
Creating Your Own Captive Portal
98(2)
SSIDChalking
100(1)
The Dream of Mesh Communities
101(8)
The Brisbane Mesh
102(1)
Challenges Facing Mesh Communities
103(6)
Part II What You Need and What You Need to Do With It
Access Points and Gateways
109(30)
Access Points: Broad Power, Limited Agenda
110(7)
Firmware
110(2)
Computer-Controlled Data Radios
112(2)
Command and Control
114(1)
Talking to Your Access Point
115(2)
Wireless Residential Gateways
117(3)
``Dual-Mode'' Access Points and Gateways
120(1)
Diversity Reception and Dual Antennas
121(1)
Common Access Point Configuration Parameters
122(7)
Firmware Updates
126(3)
Power Over Ethernet (PoE)
129(6)
Why PoE?
130(1)
How PoE Works
130(1)
Passive and Active Devices
131(2)
The Voltage Drop Problem
The Power Connector Problem
133(1)
Commercial PoE Products
134(1)
Choosing an Access Point or Gateway
135(4)
What About Used Gear?
136(3)
Client Adapters
139(22)
What's Inside Client Adapters?
139(5)
Chipset Differences
140(1)
Dual Antennas and Diversity Reception
141(1)
``High-Power'' Client Adapters
142(1)
A Note on Ad Hoc Mode
142(1)
Client Profiles
143(1)
The Different Kinds of Client Adapters
144(11)
PCMCIA (PC) Cards
144(2)
The Battle of the Bulge Antennas
146(2)
PCI Cards
148(3)
USB Adapters
151(2)
Ethernet Client Adapters
153(2)
Which Client Adapter to Choose?
155(4)
PCMCIA (PC Card) Client Adapters
155(1)
PCI Client Adapters
156(1)
USB Client Adapters
157(1)
Ethernet Client Adapters
158(1)
My Recommendations
158(1)
Ready to Network
159(2)
Antennas, Cables, and Connectors
161(36)
How Antennas Work
162(5)
The Mythical Isotropic Antenna
162(1)
The Shape of the Field
163(2)
The Threat from the Third Dimension
165(1)
A Quick Word on Frequency and Wavelength
166(1)
The Different Families of Antennas
167(12)
Omnidirectional Vertical Antennas
167(1)
Omnidirectional Vertical Gain Antennas
168(1)
PC Card Integrated ``Bulge'' Antennas
168(1)
Blade Antennas
169(2)
Ceiling Blister Omnidirectional Antennas
171(1)
Waveguide Antennas
171(2)
Parabolic Grid Antennas
173(1)
Picture Frame Antennas
173(2)
Sector Antennas
175(1)
Backfire Antennas
176(1)
Yagi Antennas
177(1)
A Special Case: The Pringle's Can Antenna
178(1)
dB, dBi, dBm: The Decibel Family
179(2)
Eyeballing Gains and Losses
180(1)
Antennas and dBi
181(2)
Watts and dBm
181(2)
Coaxial Cable
183(3)
What Coax Is For
183(1)
Frequency, Power, and Loss
184(1)
Calculating Coaxial Cable Losses
185(1)
Other Loss Effects
186(1)
Pigtails
186(1)
Coaxial Connectors
187(7)
Reverse-Polarity Connectors
187(1)
N Connectors
188(1)
MMCX Connectors
188(1)
RMC Connectors
189(1)
RP-SMA (Reverse Polarity SMA) Connectors
190(1)
RP-TNC (Reverse Polarity TNC) Connectors
191(1)
Coaxial Connector Losses
192(1)
Path Loss
193(1)
Calculating Link Budgets
194(3)
A Link Budget Example
195(2)
Putting It Together and Testing It Out
197(40)
Notes on Platforms
198(1)
Installing a Small Wi-Fi Network: Overview
199(6)
What You'll Need from Your Internet Service Provider
201(1)
Small Things Count!
202(2)
My Three Networks
204(1)
Building the 85% Network
205(6)
Configuring the Wireless Residential Gateway
206(4)
Installing Your Client Adapters
210(1)
Configuring Your Client Adapters
211(7)
Configuring Windows XP
211(3)
Windows Versions Other than XP
214(1)
Auditing the Field
215(3)
Building an Add-On Wi-Fi Network
218(5)
Cabling an Add-On Network
218(1)
Adding Additional Wired Ports through the Uplink Port
219(1)
Configuration Screen Subnet Conflicts
220(2)
Finishing off the Add-On Network
222(1)
Building the Multi-Zone Wi-Fi Network
223(1)
Roaming
223(1)
Load Balancing
224(1)
Cabling a Multi-Zone Network
224(6)
HomePlug Powerline Networking
226(1)
Access Point Configuration
226(2)
Configuring Client Adapters
228(2)
If Things Don't Work
230(2)
Testing Your Throughput
232(2)
Ready To Secure
234(3)
Wi-Fi Warriors on the Road
237(18)
Wireless Wandering
237(7)
Finding Public Hotspots
240(2)
Hotspot Networks and Aggregators
242(1)
Connection Costs and Plans
243(1)
The Shape of Your Work
243(1)
Major Hotspot Networks
244(11)
Boingo
244(3)
Joltage
247(2)
T-Mobile
249(2)
Wayport
251(4)
Part III Un-Wired Security
The Problem of the Speckled Axe
255(12)
A Matter of Trust
256(1)
Understanding Technology
257(2)
A Micrometer Is Not a C-Clamp
258(1)
Crickets and Termites
259(1)
Unplanned Obsolescence
260(1)
The Futility of Secrets
261(1)
Working Dumb
262(2)
Ignorance Is Expensive
263(1)
Don't Forget Original Sin
264(1)
Balancing Risk and Trust in a Complicated World
265(2)
What Hackers Can Do and How You Can Thwart Them
267(12)
The Hacker Pyramid
267(2)
Black Hats and White Hats
268(1)
The Network Mafia
268(1)
What Hackers Can Do
269(5)
Unauthorized Connection
269(1)
Network Traffic Sniffing
270(1)
Hijacking Via Trojan Horse
271(1)
Denial of Service Attacks
272(1)
IP Impersonation
272(2)
What Measures You Should Take
274(4)
The Good News and the Bad News
278(1)
WEP (Wired Equivalent Privacy)
279(1)
What WEP Does---and Does Not Do
280(1)
How WEP Works
281(1)
How WEP Fails
282(6)
Weak Initialization Vector (IV) Values
283(2)
Defeating AirSnort with Key Rotation
285(3)
How Many Bits, and Does It Matter?
288(2)
The Promise of 802.1X
290(2)
Looking Ahead: Wi-Fi Protected Access (WPA)
292
Part IV Practice and Projects
Setting Up Security
279(34)
A Word on Mac Address Filtering
297(3)
Explain Twice, Succeed Once!
300(1)
Setting up Security---General Steps
300(4)
A Real-World Example
304(8)
Setting Up WEP Using Windows XP's Built-In Wi-Fi Support
308(4)
Final Wi-Fi Security Tips
312(1)
The Tin Can Bandwidth Expander Project
313(20)
What Tin Can Antennas Are For
314(4)
Building the Bandwidth Expander
318(10)
Choosing Your Can
318(3)
The Overall Design and a Little More Math
321(2)
Drilling for the Connector
323(2)
Making the Probe Assembly
325(3)
Bad Ideas and Further Research
328(5)
Tetra Brik Antennas
329(2)
PrimeStar TV Dish Antennas
331(2)
Bridging Two Networks
333(20)
A Bridge Too Far?
334(1)
What You're Up Against
335(3)
A Bridging Strategy
338(3)
Switches, Routers, and DHCP
340(1)
A Real Example with Real Hardware
341(4)
What You'll Need
342(1)
Setting It Up
342(2)
Configuring the Farside Network
344(1)
Troubleshooting the Network Setup
345(8)
Aiming Your Antennas
347(6)
The Parabolic Mesh Reflector Project
353(16)
Focused Reflectors
355(1)
Making a Reflector
356(11)
How Parabolic Reflectors Work
359(1)
Mounting the Reflector
360(2)
Mounting the Access Point
362(2)
Adjusting the Mesh Reflector
364(3)
Final Thoughts
367(2)
Going Wardriving
369(24)
Wardriving
369(3)
Taking the Pulse of Wireless Networking
371(1)
Warmemes
371(1)
Warchalking
372(5)
Legality and Ethics
374(3)
What You'll Need for Wardriving
377(13)
NetStumbler
378(1)
The NetStumbler Forums
378(1)
Installing and Configuring NetStumbler
379(1)
Using NetStumbler
379(1)
NetStumbler's Main Display
380(4)
NetStumbler Views and Filters
384(2)
The Signal Strength Display
386(1)
GPS
387(1)
External Antennas
388(2)
Effective Wardriving
390(3)
The Autoconnect Problem
391(2)
NetStumbler's Log Files
393(14)
NetStumbler's Native Data Files
394(1)
Merging NetStumber Log Files
394(9)
Exporting to Text
394(1)
The Text File Field Structure
395(1)
The Flag Bits
396(5)
The Channel Bits
401(2)
Mapping Stumbled Stations with MapPoint and Stumbverter
403(4)
Using Stumbverter
403(4)
Appendix A Directory of Suppliers 407(2)
Appendix B FCC Regulations Governing Wi-Fi 409(8)
Appendix C Configuring Your TCP/IP Configuration Data 417(6)
Encyclopedia of 802.11 Standards 423(16)
Index 439

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