Date: Wed, 10 Jan 2007 09:51:14 -0800 From: Chuck Swiger <cswiger@mac.com> To: =?WINDOWS-1252?Q?Nejc_=8Akoberne?= <nejc@skoberne.net> Cc: questions@freebsd.org Subject: Re: Simple DoS Message-ID: <528B65CB-C5C5-42E7-9380-6EFA83339268@mac.com> In-Reply-To: <45A4FDDA.8040909@skoberne.net> References: <45A4FDDA.8040909@skoberne.net>
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On Jan 10, 2007, at 6:53 AM, Nejc =8Akoberne wrote: > yesterday one of our clients did something interesting (stupid): they > connected both ends of an UTP cable to the same switch, to which our > FreeBSD server was also connected. [ ... ] > Any ideas how to prevent such situations in the future? (I would like > to do it on the server side, not on the "user side".) This isn't a FreeBSD-specific issue, but a matter of controlling =20 access to the central networking hardware to only those qualified to =20 deal with it. However, if you purchase higher-quality smart =20 switches, they implement the spanning tree protocol to detect and =20 break loops like the one you've described. --=20 -Chuck
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