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Searching subnets for hardware

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What sort of things must I know or provide to a tool to search netwrok subnets for hardware. I want to be able to search a specific subnet and determine what is on it -- what tiems do I need to specify/know to succesfully perform a search on a subnet

Thank you

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by joseph moore

Well, this type of thing is not foolproof, keep that in mind.
But one way you can accomplish this is by using "OS Fingerprinting", where you run an application that connects to all machines on a subnet, and examines the IP packets they send back.
It turns out that different operating systems (including the os on devices like routers and switches) all reply a little differently. It is possible to tell a Cisco router from a Win2K server in this method.

The tool you will want to use this is NMAP. One of its many features is OS fingerprinting.

www.insecure.org/nmap

hope this helps

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