Kismet

Kismet is also a wireless network sniffer and intrusion detection system. It normally sniffs through 802.11 layer 2 traffic, which includes 802.11b, 802.11a, and 802.11g. The tool works with any wireless card available on the machine that it runs on in order to sniff.

Unlike other tools that use a command-line interface, Kismet is operated using a graphical user interface that pops up after a user opens the program. The interface has three sections that users use to make requests or view the status of an attack. When the tool scans a Wi-Fi network, it will detect whether it is secured or unsecured. If it is secured, it detects whether the encryption used is weak. Using a number of commands, the user can instruct the tools to crack into the identified Wi-Fi networks. Figure 9 shows a screenshot of the Kismet GUI. The graphical user interface is well laid and a user interacts with the program using well-defined menus, as shown in the screenshot: