From owner-freebsd-mobile@FreeBSD.ORG Wed Apr 14 12:22:32 2004 Return-Path: Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5318E16A4CE for ; Wed, 14 Apr 2004 12:22:32 -0700 (PDT) Received: from andrea.pop4.net (www.pop4.net [216.234.109.11]) by mx1.FreeBSD.org (Postfix) with SMTP id C30E143D5C for ; Wed, 14 Apr 2004 12:22:31 -0700 (PDT) (envelope-from vev@michvhf.com) Received: (qmail 83216 invoked by uid 1008); 14 Apr 2004 19:22:27 -0000 Received: from vev@michvhf.com by www.pop4.net with qmail-scanner-0.96 (uvscan: v4.1.40/v4156. . Clean. Processed in 1.371923 secs); 14 Apr 2004 19:22:27 -0000 Received: from unknown (HELO paprika.michvhf.com) (67.36.71.182) by 0 with SMTP; 14 Apr 2004 19:22:26 -0000 Received: (qmail 85513 invoked by uid 1001); 14 Apr 2004 19:22:29 -0000 Date: Wed, 14 Apr 2004 15:22:29 -0400 (EDT) From: Vince Vielhaber To: richard childers / kg6hac In-Reply-To: <407D7323.50001@pacbell.net> Message-ID: References: <407D7323.50001@pacbell.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-mobile@freebsd.org Subject: Re: Hams Report 85-mile 802.11b File Transfers @ Oregon X-BeenThere: freebsd-mobile@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Mobile computing with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Apr 2004 19:22:32 -0000 On Wed, 14 Apr 2004, 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. There are guys on the wireless equipment list that are getting 60+ miles with off the shelf components. Not just swapping a few files, these are 24/7/365 links. The timing problems are overcome with the software they're using (StarOS, also off the shelf). Vince. -- Fast, inexpensive internet service 56k and beyond! http://www.pop4.net/ http://www.meanstreamradio.com http://www.unknown-artists.com Online radio: It's not file sharing, it's just radio.