Gentoo Archives: gentoo-user

From: Matthias Bethke <matthias@×××××××.de>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] DHCP Jammer
Date: Tue, 17 Jan 2006 11:29:53
Message-Id: 20060117111800.GC18062@huxley
In Reply to: [gentoo-user] DHCP Jammer by Chris Ong
1 Hi Chris,
2 on Tuesday, 2006-01-17 at 17:50:01, you wrote:
3 > Say, I have a DHCP server is distributing 172.30.10.0/24 IP range,
4 > but a joker simply plug in another DHCP server and distributing
5 > 192.168.12.0/24 IP. Is there anyway I can stop the unwanted DHCP broadcast?
6
7 That's a network infrastructure and policy issue. Use port security in
8 your switches, i.e. filter by MAC addresses so everybody who wants to
9 plug in their machine hast to pass by your desk and register their MAC.
10 Set up dhcpcd on every machine to log its actions to syslog so you can
11 determine the MAC address of every fake server that assigned some wrong
12 address. Then get a cat-5-o'nine-tails
13 (http://www.tasigh.org/tuq/whips.html) and wait.
14
15 regards
16 Matthias
17
18 --
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