root@brainsware:~# nmap 32.23.23.23

Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2006-03-20 15:01 CET
Note: Host seems down. If it is really up, but blocking our ping probes, try -P0
Nmap finished: 1 IP address (0 hosts up) scanned in 2.025 seconds
root@brainsware:~# nmap 32.23.23.23 -P0

Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2006-03-20 15:02 CET
All 1663 scanned ports on 32.23.23.23 are: filtered

Nmap finished: 1 IP address (1 host up) scanned in 335.783 seconds