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Network Security Vuln-Dev
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Re: Tool for Identifying Rogue Linksys Routers

Subject: Re: Tool for Identifying Rogue Linksys Routers
Date: Fri, 26 Aug 2005 21:41:12 -0300
Why not arpwatch? It is tiny, simple and passive.

On 8/25/05, Matt Mercer <MattM@pyramidcorporation.com> wrote:
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



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