This module covers the fundamentals of Nmap, one of the most essential tools for network reconnaissance and security auditing. Nmap is used to discover hosts and services on a network, thereby mapping the network and identifying potential security vulnerabilities.
Prerequisites: Basic understanding of networks, TCP/IP, and Linux command line
- Understand what Nmap is and its use cases in ethical hacking
- Install and configure Nmap on your system
- Perform basic network scans and interpret the results
- Use various scan techniques (TCP, UDP, SYN, etc.)
- Identify open ports, services, and operating systems
- Implement scanning best practices and avoid detection
- Create custom Nmap commands for specific reconnaissance tasks
- Nmap - Network mapper and port scanner (Download)
- Linux Terminal or Command Prompt
- VPN Connection (for TryHackMe labs)
- Text editor for taking notes
Linux:
sudo apt update
sudo apt install nmapVerify Installation:
nmap --version# Basic host scan
nmap scanme.nmap.org
# OS detection
sudo nmap -O scanme.nmap.org
- Only scan networks you own or have explicit permission to scan
- Unauthorized network scanning is illegal in most jurisdictions
- Always use Nmap responsibly and ethically
- Respect the terms of service of TryHackMe labs
- Document your activities for educational purposes