One fairly cheap solution would be to place a few linux boxes around the office and/or areas that people could plug WAPs into. On these boxes you might consider a program called Kismet, the beauty of this program is that it will detect APs that are not broadcasting their essid. It does this by listening for association frames. I would consider this a good place to get started...
-Mike -----Original Message----- From: Boschmann, Armin [mailto:[EMAIL PROTECTED]] Sent: Friday, December 06, 2002 12:45 PM To: '[EMAIL PROTECTED]' Subject: Wireless LAN detection We have a policy of no-wireless at our sites. I want to audit this policy, similar to war-dialing, or more correctly war-driving. My thinking is to find illegal wireless equipment in realtime. My concern is insiders (temporary employees, contractors, 'bad' employees) plugging in a wireless access point, then accessing our network from the street, then disconnecting. So I am envisioning a computer with a wireless receiver that will look for TCP/IP traffic, and tell me if it detects communications to any of our computers. I can see several problems, such as distinguishing between our 192.168.x.x addresses and those on WLANs of our neighbors. Also I would have to harden the wireless detection computer, and ideally not connect it to our network at all yet have some means of notifying me (pager, cell modem). Does anyone know of a product that does this? Or if you think my approach is suspect, suggest another one? Armin Boschmann [EMAIL PROTECTED] Manitoba Hydro