You can do what your trying to do but you might have to create some of your
own code. For true directional finding (DF'ing) you would need a reciever and a
doppler DF system that can recieve at 2.4ghz (aka the wireless card for the reciever).
Netstumbler allows you to view client accesses. With the bearing information you
obtain from the doppler DF system, you can then use the GPS coordinates you acquired
while receiving the signal to triangulate the intruder. This would have to be
intergrated into one system (aka linux) if you ask me to be in some sort of real-time
fashion.
Example Doppler http://www.silcom.com/~pelican2/MINI_CIRCUIT.html
Matthew F. Caldwell, CISSP
Chief Security Officer
GuardedNet, Inc
-----Original Message-----
From: Beverstock, David [mailto:[EMAIL PROTECTED]]
Sent: Mon 7/1/2002 9:59 AM
To: 'David Laganière'; [EMAIL PROTECTED]
Cc:
Subject: RE: Wireless LAN question
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]
