Re: Using freebsd to analyse ip usage?

[Charles Swiger]

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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Re: Using freebsd to analyse ip usage?

[Simon Gray]

> 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 192.168.0.0/24

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

Hope this helps,

Simon

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