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From: techlist at (Jeff Schreiner)
Subject: Cisco LEAP exploit tool...

This is true but from my experience with amateur radio an HF rig running at
14 MHz (wavelength of 20 meters) at 1.5 watts will travel to Europe.  A 2
meter (144 - 150 Mhz) mobile rig with 1/2 wave omni directional antenna
running at 50 watt output on a good day when the conditions are right will
cover 25 to 30 miles before the signal degrades to a point that
communication is not possible.

The wavelength of 2.4 GHz is 128mm at 1 watt which is not going to go maybe
a few hundred yards before it attenuates to nothing 1/4 mile at best not to
mention all the other RF interference.

Even a perfectly tuned directional antenna would not be able to pick up that
miniscule of a signal from 7 miles away 1/2 mile maybe with a good preamp to
amplify the incoming signal and you'd still have to dig it out of all the
other RF noise.

Even directional tracking devices used by zoologists will only pick up the
signal from a few miles away and that's when in a helicopter in a pristine
RF environment.

Sorry about the extended discussion on RF broadcasts, the main point wanted
to point out was detecting a 802.11 2.4 GHz transmission from 7 miles away
would be almost impossible.

Jeff Schreiner
FCC call sign KB0WUN

-----Original Message-----
From: Ron DuFresne [] 
Sent: Wednesday, April 14, 2004 8:40 PM
To: Jeff Schreiner
Subject: RE: [Full-Disclosure] Cisco LEAP exploit tool...

On Wed, 14 Apr 2004, Jeff Schreiner wrote:

> 7 miles away is stretching it a bit far considering that all 802.11g
> wireless transmissions range between 2.4 - 2.4835 Ghz 802.11a/h/j range
> between 5.47 - 5.725 Ghz not only are the frequencies prone to
> radio waves bounce off everything.  All wireless routers are limited by
> regulations to a maximum of 1 watt.

The sniffing antenea does not have to have these limitations though.
diretional antenea can reachout much farther and pickuup what might be
thought to be reaching only a short distance.


Ron DuFresne
"Cutting the space budget really restores my faith in humanity.  It
eliminates dreams, goals, and ideals and lets us get straight to the
business of hate, debauchery, and self-annihilation." -- Johnny Hart
	***testing, only testing, and damn good at it too!***

OK, so you're a Ph.D.  Just don't touch anything.

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