[root@pc-mdv ~]# nmap 192.168.1.5

Starting Nmap 4.20 ( http://insecure.org ) at 2007-10-01 00:16 CEST
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 0.238 seconds
[root@pc-mdv ~]# nmap 192.168.1.5

Starting Nmap 4.20 ( http://insecure.org ) at 2007-10-01 00:18 CEST
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 0.246 seconds
[root@pc-mdv ~]# nmap 192.168.1.5