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RE: Deny client from obtaining IP address
From: "Dubber, Drew B" <drew.dubber () eds com>
Date: Fri, 28 Jul 2006 15:10:39 +0100

Hi
 
The classic way in the past was to use reservations. But its far too
easy to spoof MAC addresses and you need to keep a spare range for your
roaming laptop users (unless you want an admin nightmare), which kind of
defeats its purpose! So in summary its a crock :) I'd look to 802.1x
authentication for this kind of requirement. Alternatively Cisco/MS do
some quarantine type products (haven't looked at them though). You could
also setup a ipsec group policy on your pc's/servers which prevents
rogue computers connecting even though they can get an IP address.
MetaIP also appears to have the kind of functionality you are after
(http://www.metainfo.com)
 
Hope that helps
 
Drew

________________________________

From: rolando_ruiz () jetaviation com [mailto:rolando_ruiz () jetaviation com]
Sent: Thu 27/07/2006 17:24
To: security-basics () securityfocus com
Subject: Deny client from obtaining IP address



Hello all,

Is there a way that in DHCP or so, one can deny a client computer from
obtaining an IP address? We use Microsoft servers ADS environment and
I'd like to allow only those we want to obtain
an IP address. I don't want to make it too restricted where authorized
users are unable to connect. I'm sure there are some 3rd party apps that
can handle this and I welcome suggestions on those also. This is a
solution for denying connectivity to outsiders.

Thank you



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This list is sponsored by: Norwich University

EARN A MASTER OF SCIENCE IN INFORMATION ASSURANCE - ONLINE
The NSA has designated Norwich University a center of Academic Excellence
in Information Security. Our program offers unparalleled Infosec management
education and the case study affords you unmatched consulting experience.
Using interactive e-Learning technology, you can earn this esteemed degree,
without disrupting your career or home life.

http://www.msia.norwich.edu/secfocus
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