Using freebsd to analyse ip usage?

Charles Swiger cswiger at
Thu Nov 20 09:02:50 PST 2003

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...


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