8 free Wi-Fi security tools
Programs you can use to do Wi-Fi stumbling and surveying
By Eric Geier | Network World US | Published: 14:53, 13 December 11
Even if you have an enterprise-level Wi-Fi spectrum analyser, like Wi-Spy or AirMagnet, free Wi-Fi tools can also come in handy. You might use them during the planning or installation stages of your wireless LAN, while troubleshooting, or when performing maintenance. They could even serve as your primarily tools in smaller and less-complex environments.
Here are several free programs you can use to do Wi-Fi stumbling and surveying on all the popular platforms — Windows, Mac OS X, and Linux. You’ll be able see all the nearby wireless access points (APs) and their details, including channels, signal levels, and MAC address.
Kismet is a free and open Wi-Fi stumbler, packet sniffer, and intrusion detection system for Windows, Mac OS X, Linux, and BSD. It shows the AP details, including the SSID of 'hidden' networks. Plus it reports the noise levels and gives you the signal-to-noise (SNR) values. It can also capture the raw wireless packets to a PCAP file, so you can import into Wireshark, TCPdump, and other tools. Kismet, however, in Windows only works with CACE AirPcap wireless adapters due to the limitation of Windows drivers. It does, however, support a variety of wireless adapters in Mac OS X and Linux.