full-disclosure - how to bypass rouge machine detection techniques

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Date: Mon Jul 11 12:35:27 2005
From: jlauro at umflint.edu (Lauro, John)
Subject: how to bypass rouge machine detection techniques

Some low-end NAT routers will automatically take over the MAC address
of the first device plugged into it.  (Designed to allow easy
plug-n-play into a cable modem that only supports one MAC address
behind it, without having to reboot the cable modem).  It will fail
detection if such a device is used.  (Not to mention the many ways to
avoid detection if you purposely mask yourself).

> -----Original Message-----
> From: full-disclosure-bounces@...ts.grok.org.uk
[mailto:full-disclosure-
> bounces@...ts.grok.org.uk] On Behalf Of Gaurav Kumar
> Sent: Monday, July 11, 2005 5:59 AM
> To: full-disclosure@...ts.grok.org.uk
> Subject: [Full-disclosure] how to bypass rouge machine detection
> techniques
> 
> Friends,
> 
> There are several techniques available for detecting rouge (not
being
> a member of trusted domain) machines, such as active scanning,
active
> directory querying etc, but I guess most powerful being the one used
> by epolicy orchestrator. Its agents (deployed on each subnet) checks
> for L2 broadcasts like Arp broadcast etc. After detecting a
broadcast,
> it used the mac address and ip address to proceed further to detect
> whether the machine is rouge or not.
> 
>
http://www.networkassociates.com/us/local_content/white_papers/wp_epo3
_5_r
> sdwhitepaper_july2004.pdf
> 
> I was wondering if this approach is foolproof and can be safely
> deployed or if there is a way to bypass it?