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What

• 802.11 layer2 wireless network detector, sniffer, and intrusion detection system
• 802.11b, 802.11g, 802.11a, 802.11n sniffing
• Standard PCAP file logging (Wireshark, Tcpdump, etc)
• Client/Server modular architecture
• Multi-card and channel hopping support
• Runtime WEP decoding
• Tun/Tap virtual network interface drivers for realtime export of packets
• Hidden SSID decloaking
• Distributed remote sniffing with Kismet drones
• XML logging for integration with other tools
• Linux, OSX, Windows, and BSD support (devices and drivers permitting)

Refs

• http://www.kismetwireless.net/
• http://trac.kismac-ng.org/wiki