wireless hacking projects for wifi enthusiasts phần 1 pot

[...]... 2.472 14 2.484 Spain France Israel China Japan Page 6 2. 412 2. 417 2.422 2.427 2.432 2.437 2.442 2.447 2.452 2.457 2.462 2.467 Europe 10 :05 AM 1 2 3 4 5 6 7 8 9 10 11 12 13 USA 9/30/04 Center Frequency (in GHz) Hack_ 01. qxd Channel Number Chapter 1 • A Brief Overview of the Wireless World ww.syngress.com Table 1. 1 802 .11 b Channels A Brief Overview of the Wireless World • Chapter 1 The top speed for 802 .11 b... 802 .11 offers 11 non-overlapping channels See Table 1. 2 for a list of 802 .11 a channels.The pros and cons of 802 .11 a are as follows: I Upside: Relatively fast speed; more non-overlapping channels than 802 .11 b/g; 5 GHz spectrum is less crowded I Downside: More expensive; shorter range Table 1. 2 802 .11 a Channels Channel Number Center Frequency (in GHz) USA 36 40 44 48 52 56 60 64 14 9 15 3 15 7 16 1 5 .18 0... to use Channels 1, 6, and 11 That’s why you sometimes hear people say that 802 .11 b only has three “real” channels 802 .11 a Although 802 .11 a was released around the same time as 802 .11 b, it never achieved the same critical mass or wide scale acceptance.This was despite 802 .11 a’s superior 54-Mbps speed (Before 802 .11 g was released, 802 .11 a was the fastest Wi-Fi protocol available.) 802 .11 a operates in... Preparing for the Hack 11 7 11 8 12 0 12 1 xv xvi Contents m0n0wall on a Standard PC 12 1 m0n0wall on a Single Board Computer (SBC) 12 1 Performing the Hack 12 2 Downloading a Recent Version 12 3 Creating a CD-ROM from Windows 12 3 Creating a Compact Flash (CF) Card from Windows 12 5 Starting... the history of 802 .11 , as it never achieved any notable commercial success due to its limited range and line of sight requirements In 19 99, the higher speed 802 .11 a and 802 .11 b protocols were ratified 802 .11 b added 5.5 and 11 Mbps support using DSSS in 2.4 GHz, making it backwards-compatible with existing 1 and 2 Mbps DSSS gear (but not compatible with FHSS or IR equipment) 802 .11 a added Orthogonal... confusion about the differences between 802 .11 a, b, and g Using this information as a guide, you will be ready to make informed and educated choices regarding the protocol best suited for your particular deployment 802 .11 b For many years, 802 .11 b was widely regarded as the most popular form of Wi-Fi It utilizes frequencies in the 2.4 GHz range (2.400–2.485GHz) and has 11 channels However, only three of these... 16 4 Enabling SNMP 16 5 Preparing for the Hack 16 5 Performing the Hack 16 5 Under the Hood: How the Hack Works 16 7 Getif and SNMP Exploration for Microsoft Windows 16 8 Preparing for the Hack 16 8 Performing the Hack 16 8 Retrieving Device... 10 6 Preparing for the Hack 10 6 Required Equipment 10 7 WarDriving Software 10 7 Optional Equipment 10 8 WarDriving Ethics 11 2 Other Resources 11 3 Part III Software Projects 11 5 Chapter 6 Wireless Operating Systems... 2003, 802 .11 g was ratified, which provided higher speeds (up to 54 Mbps) 802 .11 g works by applying OFDM modulation techniques in the 2.4 GHz unlicensed www.syngress.com A Brief Overview of the Wireless World • Chapter 1 spectrum It remains backwards-compatible with 802 .11 b by integrating DSSS modulation (at 11 , 5.5, 2, and 1 Mbps) NOTE…WHAT IS THE WI-FI ALLIANCE? If the IEEE publishes the 802 .11 standards... the first building to the hotspot in the second building is typically referred to as the “backhaul.” www.syngress.com A Brief Overview of the Wireless World • Chapter 1 802 .11 g To keep up with the 54-Mbps speed claims of 802 .11 a, the 802 .11 g protocol was ratified in 2003 This protocol took the OFDM modulation technique of 802 .11 a and applied it to the 2.4 GHz spectrum of 802 .11 b Because it operated in 2.4 . Matthew Fanady Michael Mee, Marc Palumbo, Alan Koebrick WIRELESS HACKING Projects for Wi-Fi Enthusiasts 308 _WiFi_ Hack_FM.qxd 10 /1/ 04 10 :37 AM Page iii Syngress Publishing, Inc., the author(s),. Global Publishing for his help and support with distribution of Syngress books in the Philippines. 308 _WiFi_ Hack_FM.qxd 10 /1/ 04 10 :37 AM Page v 308 _WiFi_ Hack_FM.qxd 10 /1/ 04 10 :37 AM Page vi vii Technical. easier. Register for Free Membership to 308 _WiFi_ Hack_FM.qxd 10 /1/ 04 10 :37 AM Page i 308 _WiFi_ Hack_FM.qxd 10 /1/ 04 10 :37 AM Page ii By the SoCalFreeNet.org Wireless Users Group Lee Barken with Eric Bermel,