Date: Wed, 14 Apr 2004 13:05:04 -0700 From: Scott Weikart <scott@igc.org> To: richard childers / kg6hac <fscked@pacbell.net>, freebsd-mobile@freebsd.org Subject: Re: Hams Report 85-mile 802.11b File Transfers @ Oregon Message-ID: <04041413050408.02105@sandino.dnsalias.org> In-Reply-To: <407D7323.50001@pacbell.net> References: <407D7323.50001@pacbell.net>
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I would assume the hams used directional antennas on both ends, and carefully pointed the antennas at each other. So, this may have little relevance to monitoring people's mostly-omnidirectional wireless LANs. Well, maybe you could so some math to make the ham's numbers scale, but I would guess there are more direct methods to measure/compute risk. -scott On Wednesday 14 April 2004 10:21 am, richard childers / kg6hac wrote: > Those of you inclined towards worrying about eavesdroppers will find the > following interesting ... QST Magazine (or was it NASA Tech Briefs?) > recently reported that two people successfully achieved connectivity and > exchanged files across a span of 85 miles, using COTS technology and > antennas optimized for operation in the 2.4 gHz frequency. > > People operating 802.11b networks in corporate environments, take note - > your networks can probably be monitored from anywhere within a few > [dozen?] miles of the antenna, depending upon obstructions, and perhaps > from over the horizon, as well. > > Regards, > > -- richard
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