nmap

What is nmap#

nmap is a commandline tool used to discover hosts and services on a computer network by sending packets and analyzing the responses.

nmap can be used for:

• IP scanning,
• ports scanning,
• obtaining the remote machine availability status,
• detecting the remote machine OS,
• fingerprinting the services available via ports,
• creating network maps,
• detection of network devices.

zenmap is nmap with GUI.

nmap usage examples#

nmap -sS -O IP

• -sS SYN scan, using only SYN packages,
• -O get information about which OS is being used,