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Date:      Thu, 20 Nov 2003 12:02:45 -0500
From:      Charles Swiger <cswiger@mac.com>
To:        Frederick Bowes <fred@k1x.org>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Using freebsd to analyse ip usage?
Message-ID:  <5C6BF4BA-1B7B-11D8-B453-003065ABFD92@mac.com>
In-Reply-To: <".128.250.18.41.1069309586.squirrel"@k1x.org>
References:  <".128.250.18.41.1069309586.squirrel"@k1x.org>

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On Nov 20, 2003, at 1:26 AM, Frederick Bowes wrote:
> 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

Running 'arp -a' on your router or some central machine like a 
fileserver will give you a good starting point.  Another poster 
suggested running an nmap ping scan, which will certainly work as well.

You might also look at your DHCP server's leases...

-- 
-Chuck



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