### Stealth Scanning Mechanics
A SYN stealth scan sends a SYN packet. If the target responds with SYN-ACK, the port is OPEN. The scanner immediately replies with RST (Reset), preventing the connection from logging in application-level logs.

Python 3.11

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Interactive Challenge

+75 XP

Challenge Objective

Parse the port response flag and output 'PORT_STATUS: OPEN'.

solution.py

UTF-84 SpacesAuto-saved

cpython3.11:~/workspace

CPython 3.11.8 (WASM)

$python3 -u solution.py

Click "Compile & Run" (or press Ctrl + Enter) to compile AST, verify bytecode, and execute the solution.

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Module 1: Passive OSINT & Active Network Reconnaissance•Lesson 1

1.1 Nmap TCP SYN Stealth Scanning (-sS)