Nmap Cheatsheet

Scan A Single Host For Common Ports

nmap $IP_ADDRESS

Scan A Single Host For All Ports

nmap -p- $IP_ADDRESS

Scan for a single port on a range of IP addresses.

PORT_NUMBER=22
nmap -p $PORT_NUMBER 192.168.1.*

If you want to scan all IPs from 192.168.0.0 to 192.168.2.255, you could use a - like so:

nmap -p 80 192.168.0-2.*

Check UDP Port

If you need to check if a UDP port is open you need to provide the -sU option like so:

nmap -sU -p $PORT $IP

References

• HackerTarget.com - Nmap Cheat Sheet
• Stationx.net - Nmap Cheat Sheet