bugtraq - RE: Tool for Identifying Rogue Linksys Routers

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Date: Thu, 25 Aug 2005 15:42:29 -0600
From: "Matt Mercer" <MattM@...amidcorporation.com>
To: <bugtraq@...urityfocus.com>
Cc: "Martin Mkrtchian" <dotsecure@...il.com>
Subject: RE: Tool for Identifying Rogue Linksys Routers

Hi Martin,

>We are migrating from Lucent QIP to MetaIP for DHCP services and so
>far we have had two issues when MetaIP has been implemented for  VLAN
>that has an unauthorized Linksys router giving out IP addresses.

If you have an IDS such as Snort configured on your network, it would be
fairly straightforward to build a configuration watching for DHCP
traffic on specific VLANs not originating from legitimate servers (as
defined by you, The Administrator).

Find a helpful article here describing such a scenario:

http://security.itworld.com/4363/ITW3542/page_1.html

HTH,

Matt