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Date:      Thu, 20 Nov 2003 08:55:14 -0000
From:      "Simon Gray" <>
To:        <>
Cc:        Frederick Bowes <>
Subject:   Re: Using freebsd to analyse ip usage?
Message-ID:  <004e01c3af44$5e9eacc0$1100a8c0@dtg17>
References:  <>

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> Hello Everyone,
> At work there are some unused ip addresses but we dont know which ones
> they are (because there are alot of computers) is there a port which could
> be used to ping the subnet over a few days to work out which ip addresses
> are actually coming online? Thanks

You could use nmap

cd /usr/ports/security/nmap && make install

and then do something like

nmap -sP

(that should tell you what ip's are up)

Hope this helps,


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