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[>_] ROOM · Cybersecurity
Nmap Fundamentals
Master the ultimate network x-ray machine. Go beyond basic port scanning to understand TCP packet mechanics, OS fingerprinting, NSE scripting, and IDS evasion.
Room tasks
1What is Network Scanning
2Nmap Basics
3Host Discovery Techniques
4Port Scanning Basics
5Service & Version Detection
6NSE Scripts for Vulnerability Scanning
7Evasion & Stealth Scanning Techniques
Frequently Asked Questions
What is Nmap?
Nmap is a free network scanner that discovers hosts, open ports, services, and operating systems. It is one of the first tools used in reconnaissance and network security assessments.
How does an Nmap SYN scan work?
It sends a SYN packet and watches the reply. A SYN-ACK means the port is open, a reset means closed. The scan never completes the handshake, which makes it fast and relatively quiet.
What are Nmap NSE scripts?
The Nmap Scripting Engine runs scripts that detect vulnerabilities, grab banners, and enumerate services. This free Codelivly room shows how to use them safely and effectively.