Live_host

Live host

Example Command	Scan Type
sudo nmap -PR -sn MACHINE_IP/24	ARP Scan
sudo nmap -PE -sn MACHINE_IP/24	ICMP Echo Scan
sudo nmap -PP -sn MACHINE_IP/24	ICMP Timestamp Scan
sudo nmap -PM -sn MACHINE_IP/24	ICMP Address Mask Scan
sudo nmap -PS22,80,443 -sn MACHINE_IP/30	TCP SYN Ping Scan
sudo nmap -PA22,80,443 -sn MACHINE_IP/30	TCP ACK Ping Scan
sudo nmap -PU53,161,162 -sn MACHINE_IP/30	UDP Ping Scan

Remember to add -sn if you are only interested in host discovery without port-scanning. Omitting -sn will let Nmap default to port-scanning the live hosts.

Option	Purpose
-n	no DNS lookup
-R	reverse-DNS lookup for all hosts
-sn	host discovery only