From Digital Matrix: AirSnare is an intrusion detection system to help you monitor your wireless network. AirSnare will alert you to unfriendly MAC addresses on your network as well as to DHCP requests. If AirSnare detects an unfriendly MAC address, you have the option of tracking its access to IP addresses and ports or of launching Ethereal. Version 1.5 may include unspecified updates, enhancements, or bug fixes.