Module 1: Building Your First Security Tool
The Mission: Real security engineers don't just use tools; they build them. In this first module, we are skipping the boring "Hello World" tutorials and diving straight into the logic behind a Network Port Scanner.
How This Lab Works: The terminal below is running a Python Simulation.
Safety First: This script runs in a browser sandbox. It simulates the behavior of a scanner without actually sending packets across your network (which would get you flagged by your ISP).
The Goal: We are focusing on Structure. You will see how a few lines of code can automate a repetitive task—checking thousands of ports—in seconds.
Key Concepts You Are Using:
Input(): How we capture user data (like the Target IP) and store it in a Variable.Lists []: A way to store multiple targets (Port 21, 22, 80) in one container.Loops (For): The power of automation. Instead of writing code to check each port manually, we write one loop that cycles through our list automatically.
Instructions:
Click the Run ► button in the terminal below.
When prompted, enter a target IP address (e.g.,
10.10.10.5) and hit Enter.Watch how the loop iterates through the ports and uses "Logic" to determine if they are Open or Closed.