Date: Thu, 18 Jan 1996 10:34:33 -0500 (EST) From: Chuck Robey <chuckr@glue.umd.edu> To: Michael Smith <msmith@atrad.adelaide.edu.au> Cc: Annelise Anderson <ANDRSN@HOOVER.STANFORD.EDU>, hsu@freefall.freebsd.org, questions@FreeBSD.org Subject: Re: ethernet packet sniffer. Message-ID: <Pine.SUN.3.91.960118103037.1500A-100000@mocha.eng.umd.edu> In-Reply-To: <199601180851.TAA06143@genesis.atrad.adelaide.edu.au>
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On Thu, 18 Jan 1996, Michael Smith wrote: > Annelise Anderson stands accused of saying: > > >It's worse than that. Anyone w/ an ethernet connection on your net > > >can read everything going in or out, not just sysadmins or those with > > >root priviledges on your machine. If you're really worried about > > >security, there's encrypted rlogin and pgp encryption for mail. > > > > Anyone with an ethernet connection on "my net" can read everything > > (or log it and read it later, search for key words, send it to > > someone else, etc....) > > > > Question: what's "my net"? How do I find out? Is there anything > > Any portion of the data path between you and whatever you're connected to. > If you're talking to another machine on a local ethernet, that's anywhere > on that ethernet. If you're talking to a machine on the other side of the > planet, that's anywhere along the path from you to the other machine. > > > like, say, a radar detector that determines if anyone else is doing > > this on "my net"? > > Not in any practical sense, no. Mike, I'm not saying it would be practical, but if her networking department happens to have a Time Domain Reflectometer, which is common communications equipment for high speed cables (many cable companies have one) then every tap can be detected. A TDR would spot everything, even unused BNC taps. > > > Annelise > > -- > ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ > ]] Genesis Software genesis@atrad.adelaide.edu.au [[ > ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ > ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ > ]] "Who does BSD?" "We do Chucky, we do." [[ > ============================================================================ Chuck Robey chuckr@eng.umd.edu -- I run FreeBSD on n3lxx and Journey2 --------------------------------------------------------------------------- The Dilbert Zone is Dilbert's new WWW home! The area features never-before-seen original sketches of Dilbert, a photo tour of Scott Adams' studio, Dilbert Trivia and memorabilia, high school photos and much more!: <URL:http://www.unitedmedia.com/comics/dilbert/>;
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