Date: Mon, 27 Sep 2004 01:17:23 -0400 From: bsdfsse <bsdfsse@optonline.net> To: Tim Aslat <tim@spyderweb.com.au> Cc: "freebsd-questions@FreeBSD.ORG" <freebsd-questions@FreeBSD.ORG> Subject: Re: IP address conflicts Message-ID: <4157A263.7060307@optonline.net> In-Reply-To: <20040927085147.7b2d8575@bofh.spyderweb.com.au> References: <20040927085147.7b2d8575@bofh.spyderweb.com.au>
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Hi, Could you run a packet sniffer (like Etheral), and log the traffic for the specific IP's in question? You would see when the MAC address changed for a given IP. Once you knew their MAC address, you could log all their traffic. Maybe block their traffic. Ban them from your network. thx! Tim Aslat wrote: > Hi All, > > I have an annoying situation in a school I do casual work in their IT > department. There are a number of individuals within the system who > think it's funny to allocate an IP address on a workstation identical to > the network's proxy/web/mail servers. What I'd like to know is, would > there be any way of preventing this short of spending quite a lot of > money on managed switches an the like? > > I'm unable to restrict access to settings on the machines, as they are > notebooks owned by the students/staff and could be legitimately plugged > in anywhere in the network. > > Unfortunately solitary confinement on bread & water, or public > floggings aren't an option. > > Any suggestions? > > Cheers > > Tim > >
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