Date: Thu, 09 Sep 1999 13:22:43 -0600 From: Warner Losh <imp@village.org> To: James Wyatt <jwyatt@rwsystems.net> Cc: "Lowkrantz, Goran" <Goran.Lowkrantz@infologigruppen.se>, freebsd-security@FreeBSD.ORG Subject: Re: Lisen only NIC Message-ID: <199909091922.NAA30860@harmony.village.org> In-Reply-To: Your message of "Thu, 09 Sep 1999 13:09:40 CDT." <Pine.BSF.4.10.9909091259540.45536-100000@bsdie.rwsystems.net> References: <Pine.BSF.4.10.9909091259540.45536-100000@bsdie.rwsystems.net>
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In message <Pine.BSF.4.10.9909091259540.45536-100000@bsdie.rwsystems.net> James Wyatt writes: : The only *true* way I know of to get a listen-only NIC, is to physically : disconnect the xmit line on the NIC. When I read about this in the : "Repelling the wiley hacker" internet firewall/security book and tried it : on an old 3Com 3c503, I thought it was sufficient and *really* secure. : (The book is so good I've loaned it out so email for ISBN. Great book!) I've seen in other discussions that while you could do this with the AUI based ethernet cards, you can't do this with 10base2 or 10base-t cards. Thinnet is obvious... But the 10-base-t/100-base-t cards need the xmit lines to negotiate speed settings with the hub. Can anybody confirm this? Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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