My company uses a standard laptop with an Orinoco card in a dual-boot fashion. We bought a cheap antenna for the wireless card, although you can make one using a Pringles can (as described at http://www.turnpoint.net/wireless/cantennahowto.html). We have both Windows 2000 and Linux installed on the laptop. On Windows 2000, we run Netstumbler to discover wireless LANs. On Linux, we use Airsnort to sniff and break WEP keys. A $150 GPS receiver with serial-port connection rounds out the set up for recording geographic locations.
For more information on this topic, visit these other SearchSecurity resources:
Executive Security Briefing: Keep hands off your wireless network with this hands-on device
Webcast Archive: Keeping the bad guys out -- defensive strategies revisited, with Ed Skoudis
Featured Topic: Wireless insecurity
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