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Network Security Focus-IDS
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Re: detecting "intrusion detection"

from [barcajax] Network Security [Permanent Link]
Subject: Re: detecting "intrusion detection"
Date: 6 Oct 2005 02:36:05 -0000 
The monitoring interfaces on IDSs are running promiscuously so pinging or 
scanning them won't work. You have to look for promiscuous interfaces in the 
network but finding the existence of them does not necessarily confirm the 
presence of an IDS. It could be some other device that also has its interface 
in promiscuous mode.
Alternatively, you might want to try discovering the management interface of 
the IDS. This however might be difficult as some deployments have their 
management interfaces in a separate isolated management segment that might not 
have Internet access. Even if you do have access to the management segment, you 
need to know the port numbers used by every single IDS vendor out there in the 
market to correctly guess which IDS product is present.

barcajax

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