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Re: Wireless range limiting
From: Joshua Wright <jwright () hasborg com>
Date: Wed, 16 Apr 2008 12:42:17 -0400

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Hi Charles,

Charles Hardin wrote:
| A co-worker of mine was recently telling me of a tool he had seen
| several years ago. A utility where you could upload a floor plan of
| your building and specify where your access points are located. You
| could then walk around your perimeter with a wireless client with an
| agent on it that would allow you to marcate the physical boundries of
| where you want the wireless signal to reach and it would reject
| clients outside this range based on the signal.

This is the Newbury Networks product
(http://www.newburynetworks.com/products-rf-firewall.htm).  I don't know
if I trust such a system, since they do not know the transmit power of
someone inside or outside of your facility (they probably assume
something like 100 mW + 3 dBm antenna).  If an attacker has a
higher-gain antenna, they can appear to be inside your facility with a
stronger signal.

I do not claim to know the full detail of the product, but that is my
skeptical 2 cents for today.

- -Josh
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