David, GPS is a passive device, it only listens for timing signals from satellites, it doesn't transmit. You are left with the wireless NIC, which does transmit.
I know work has been done to roughly triangulate a cell phone users position based on signal strength received at 3-4 cell towers (I believe to fulfill upcoming 911 legislation). It seems to me you would need 3-4 access points, but could do the same thing with 802.11. But somehow I don't think this model translates well to the real world. I know with the Lucent/Agere Orinoco windows drivers there is a very nice signal strength indicator in the client manager (along with MAC addresses). You could get a directional 2.4 GHz antenna (http://www.andrew.com/catalog38/Results.aspx?SearchType=1&KeyWord=&KeyWordS earchMethod=BEGINWITH&CatalogSectionID=17), and just turn it slowly and watch the signal increase and decrease (similar to what wildlife biologists do to track large mammals), and roughly locate the user that way. http://nocat.net/ might also be a solution for you to look at. Cheers, Dave -----Original Message----- From: David Laganière [mailto:[EMAIL PROTECTED]] Sent: Friday, June 28, 2002 10:05 AM To: [EMAIL PROTECTED] Subject: Wireless LAN question Hi! Say an intruder connect himself to my wireless LAN, is there a way with a GPS and it's signal to know where he is physically? Where can I get more documentation on that? Thanks. -- David Laganière Network/System Administrator www: http://www.securinet.qc.ca/ email: [EMAIL PROTECTED]
