From owner-freebsd-net Tue Jan 11 5:55:40 2000 Delivered-To: freebsd-net@freebsd.org Received: from madcap.apk.net (madcap.apk.net [207.54.158.16]) by hub.freebsd.org (Postfix) with ESMTP id 813DA1545C for ; Tue, 11 Jan 2000 05:55:38 -0800 (PST) (envelope-from stuart@apk.net) Received: from junior.apk.net (stuart@junior.apk.net [207.54.158.20]) by madcap.apk.net (8.9.3/8.9.3/apk.990812+rchk1.22+bspm1.13.1.5) with ESMTP id IAA02518; Tue, 11 Jan 2000 08:35:47 -0500 (EST) Received: from localhost (stuart@localhost) by junior.apk.net (8.9.3/8.9.3) with ESMTP id IAA00308; Tue, 11 Jan 2000 08:35:47 -0500 (EST) Date: Tue, 11 Jan 2000 08:35:46 -0500 (EST) From: Stuart Krivis To: Frank Bonnet Cc: freebsd-net@FreeBSD.ORG Subject: Re: IP address abuse ... In-Reply-To: <200001111057.LAA17219@bart.esiee.fr> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Tue, 11 Jan 2000, Frank Bonnet wrote: > Hi > > Our primary DNS runs FreeBSD and we are facing > a boring problem , some stupid student has > put the same IP address than the DNS on a Linux (mandrake) > machine , then our FreeBSD said "someone has taken my IP address" > and stop to serve our LAN ... > > Is it possible with FreeBSD to avoid such trouble ? > ( arpwatch is running on this machine ) Is the Linux machine on the same network segment as your nameserver? If not, you may be able to setup a static route in your router config and disable the Linux machine. Another option would be to simply unplug the Linux machine. :-) The student is disrupting network services. Don't you have a policy to deal with this? (Perhaps expulsion from school if he won't change the IP.) -- Stuart Krivis stuart@krivis.com Fourth law of programming: Anything that can go wrong wi sendmail: segmentation violation - core dumped To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message