Host Discovery

Scan Network Range

 sudo nmap 10.129.2.0/24 -sn -oA tnet | grep for | cut -d" " -f5

note: this scanning method works only if the firewalls of the hosts allow it. Otherwise, we can use other scanning techniques to find out if the hosts are active or not.

Scan active hosts from IP List

sudo nmap -sn -oA tnet -iL hosts.lst | grep for | cut -d" " -f5

note: if we are provided with hosts that need to be tested (hosts.lst) use the predefined list to scan them.

Scan Multiple IPs

sudo nmap -sn 10.129.2.18 10.129.2.19 10.129.2.20
sudo nmap -sn 10.129.2.18-20

note: sometimes we wont need to scan the whole network.

Check if host is up

sudo nmap -sn 10.129.2.18

note: if we dont use port scan (-sn) nmap defaultly sends ICMP ping scans () and not ICMP echo requests.