There is a way using PDA's to triangulate using multiple Access Points,
where users are located. See this article for more information:
http://www.salon.com/tech/feature/2002/06/11/stalker_tech/index.html?x
http://www.jacobsschool.ucsd.edu/newsletter/winter2002/active_campus.htm
l
http://activecampus.ucsd.edu/

Note this project is based on the PDA doing the triangulation. I would
think that with a few scripts and several Wireless IDS's, you could
identify the location of an intruder connecting to your network.

Now if the intruder in only connected to one Access Point, then they may
either be outside the detection distance of the other Wireless IDS's or
the users is using a high power antenna. In that case, you can at least
determine a sector of where they are located.

Don't forget to get their MAC address.

Joe Klein

-----Original Message-----
From: Johnson, Wayne [mailto:[EMAIL PROTECTED]] 
Sent: Monday, July 01, 2002 10:15 AM
To: [EMAIL PROTECTED]
Subject: RE: Wireless LAN question

I doubt it. A GPS device is a receiver, not a transmitter. Unless he
sends
his GPS data over your network :)

It occurs to me that you could do a little preparation work with a
wireless
laptop. By walking around your wireless coverage area you could identify
public areas that have good signal strength. That might reduce the
number of
places you have to look. While the technique is probably useless in a
large
campus environment, it might be useful in a smaller single building
environment. 
-Wayne

-----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]

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