Date: Tue, 29 Aug 1995 11:29:05 +0200 (MET DST) From: Piero Serini <piero@strider.ibenet.it> To: msmith@atrad.adelaide.edu.au (Michael Smith) Cc: Hackers@FreeBSD.ORG (FreeBSD Hackers' List) Subject: Re: ARP'ing [Summary of responses] Message-ID: <199508290929.LAA02381@strider.ibenet.it> In-Reply-To: <199508290230.MAA24552@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Aug 29, 95 12:00:07 pm
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Hello.
Quoting from Michael Smith (Tue Aug 29 04:30:07 1995):
> Pavlov's Cat stands accused of saying:
> > same address (192.168.254.130) because it's the first free entry in it's
> > dynamic pool. (N.B.: DHCP servers don't have a way to monitor addresses
> > which are "in use" but weren't asssigned by the DHCP server.) The client
> > accepts the offered address and (at least with WinDoze clients) attempts to
> > ARP the wire for "192.168.254.130" since it doesn't explicitly "trust" the server.
> > Whoops! The client "discovers" that the address is already in use!
>
> Pick a DHCP server you have source for, and get it to arp around before
> it allocates the IP number. If it finds it, you have a few options :
...
I'd go another way: shutdown the entire network on a saturday night
for maintenance, set your own machine to ARP each and every address
you don't use, then correct all the IP numbers your abusers are abusing
and turn the network up again. Then stick this note around:
I HAD TO WORK ALL THE NIGHT LONG TO RECOVER THE NETWORK
FROM YOUR ABUSES!!
Please note that assigning IP numbers is *MY* duty, not
yours, so if you need one, just ask.
VIOLATORS WILL BE PROSECUTED AND KILLED ON THE SPOT.
It should work.
Bye,
--
# $Id: .signature,v 1.12 1995/08/14 12:10:54 piero Exp $
Piero Serini Via Giambologna, 1
<Piero@Free.IT> I 20136 Milano - ITALY
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