How to Use Nmap | UpGuard

This document provides a practical overview of Nmap, an open-source network scanning and security auditing tool. It explains core capabilities (host discovery, port and OS detection, traceroute), installation steps for Windows, macOS, and Linux, and demonstrates common commands for ping, port, host, OS, and stealth scans, as well as outputting results and disabling DNS resolution for speed. It also highlights Zenmap for visual mapping and the Nmap Scripting Engine (NSE) for automation, positioning Nmap as a versatile utility for network assessment and ongoing security audits.