Nmap (Network Mapper) is a powerful open-source tool for network discovery and security auditing. It helps users identify hosts, services, and vulnerabilities on a network. This guide covers the basics of using Nmap effectively.

Key Features 🔍

  • Host detection 🧾
    Use nmap -sn 192.168.1.0/24 to discover active devices on a network without port scanning.
  • Port scanning 📡
    Run nmap -p 22,80,443 target.com to check open ports (e.g., SSH, HTTP, HTTPS).
  • OS fingerprinting 🧩
    Add -O to guess the operating system of a target: nmap -O 192.168.1.1.

Practical Examples 📝

  1. Scan a single IP:
    nmap 192.168.1.1
    
  2. Scan a subnet:
    nmap 192.168.1.0/24
    
  3. Scan with version detection:
    nmap -sV target.com
    

⚠️ Important: Always ensure you have explicit authorization before scanning networks. Unauthorized use may violate laws and policies.

For deeper insights into network security, check our Network Security Tutorial.

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