From owner-freebsd-questions Thu Jan 18 16:39:46 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id QAA16146 for questions-outgoing; Thu, 18 Jan 1996 16:39:46 -0800 (PST) Received: from who.cdrom.com (who.cdrom.com [192.216.222.3]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id QAA16140 for ; Thu, 18 Jan 1996 16:39:43 -0800 (PST) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by who.cdrom.com (8.6.12/8.6.11) with ESMTP id QAA05087 for ; Thu, 18 Jan 1996 16:39:31 -0800 Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) id LAA07921; Fri, 19 Jan 1996 11:06:25 +1030 From: Michael Smith Message-Id: <199601190036.LAA07921@genesis.atrad.adelaide.edu.au> Subject: Re: ethernet packet sniffer. To: chuckr@glue.umd.edu (Chuck Robey) Date: Fri, 19 Jan 1996 11:06:24 +1030 (CST) Cc: msmith@atrad.adelaide.edu.au, ANDRSN@HOOVER.STANFORD.EDU, hsu@freefall.freebsd.org, questions@FreeBSD.org In-Reply-To: from "Chuck Robey" at Jan 18, 96 10:34:33 am MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-questions@FreeBSD.org Precedence: bulk Chuck Robey stands accused of saying: > > > > > 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. That doesn't tell you whether someone is _listening_ on the tap, which was the point of the question. > Chuck Robey chuckr@eng.umd.edu -- I run FreeBSD on n3lxx and Journey2 -- ]] 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." [[