Nmap

Summary

Nmap (short for "Network Mapper") is a powerful open-source tool used for network discovery and security auditing. It is widely utilized by network administrators, cybersecurity professionals, and penetration testers to gather information about networked devices and diagnose network issues. Nmap is available for multiple platforms, including Windows, macOS, and Linux.

Basic

Scan 100 most common ports (fast)

nmap -F [ip|hostname]

Scan a single port

Add `-sV` to detect what service is running on the specified port.

UDP

nmap -sU -p [port#] [ip|hostname]

TCP

nmap -sT -p [port#] [ip|hostname]

Scan a range of ports

nmap -p 80-81 [ip|hostname]

Advanced

OS and version detection, script scanning, and traceroute

 Warning:  This will likely be detected by an IDS/IPS

nmap -A -T4 [ip|hostname]

Firewall Audit (from another machine)

2020-06-07 - I don't think this is right...need to find a better command

nmap –v –sA –n [ip|hostname] –oA [output-filename]