Ping Sweep:
# nmap -sP 10.1.2.0/24
Produces this result:
Starting Nmap 4.60 ( http://insecure.org ) at 2010-02-17 10:01 EST
Host 10.1.2.1 appears to be up.
MAC Address: 00:06:31:7B:48:0C (Cisco Systems)
Host 10.1.2.2 appears to be up.
MAC Address: 00:03:BA:42:DE:49 (Sun Microsystems)
Host 10.1.2.3 appears to be up.
MAC Address: 00:03:BA:55:26:BA (Sun Microsystems)
List Scan:
# nmap -sL 10.1.2.0/24
Produces this result:
Starting Nmap 4.60 ( http://insecure.org ) at 2010-02-17 10:54 EST
Host server1 (10.1.2.1) not scanned
Host 10.1.2.2 not scanned
Host 10.1.2.3 not scanned
Host server4 (10.1.2.4) not scanned
Host server5 (10.1.2.5) not scanned
Host server6 (10.1.2.6) not scanned
Due to the “no impact” nature of these scans, particular the list scan, you needn’t be concerned that your gentle probing of network space is going to register as a problem.