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RE: Wireless LAN detection
From: "Optrics Engineering - Shaun Sturby, MCSE" <Shaun () Optrics com>
Date: Fri, 6 Dec 2002 16:09:58 -0700

Hello Armin,

Take a look at 'Observer' by Network Instruments (www.networkinstruments.com) It is a realtime packet sniffer that will 
work with
any NDIS5 supported NIC including 802.11a and 802.11b and it has the ability to send alerts from something as simple as 
a local
popup to Dialing a pager or sending an e-mail via a dial-on-demand TCP/IP connection.

-----Original Message-----
From: Boschmann, Armin [mailto:aboschmann () hydro mb ca]
Sent: Friday, December 06, 2002 11:45 AM
To: 'security-basics () lists securityfocus com'
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
aboschmann () hydro mb ca
Manitoba Hydro

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