DAY 1 · MODULE 6

Build a Port Scanner – Concepts

Understand how a scanner tests whether approved target ports accept connections.

60 minSafe scan simulationIn Progress
01 · LEARN

Understand the concept

Target host
Port range
Connection attempt
Timeout
Open and closed state
Service mapping
Why this matters

Students should understand what a scan result means before they later use professional tools such as Nmap in the isolated lab.

02 · VISUALIZE

See what happens internally

Interactive visualization loads here.
Stage 2 Interactive Lab

Operate this concept in a larger realtime simulation and save your practical score.

Open Interactive Lab
03 · PRACTICAL

Perform the activity

  1. Use the port visualizer to simulate a scan.
  2. Compare open and closed ports.
  3. Review Python socket logic for a lab-only scanner.
  4. Record findings in a port/service table.
Workshop safety: Activities involving scanning, web vulnerabilities or security testing must be performed only on the assigned training target or intentionally vulnerable lab.
04 · CODE / COMMANDS

Read and understand the working example

Lab-only concept:
for port in approved_ports:
    try_connect(approved_target, port)
    record_result(port)

This example is shown for guided learning. Real host/network execution is reserved for the isolated cyber-range stage.

05 · CHALLENGE

Prove your understanding

Given the simulated target, list its open ports, associated services and one defensive recommendation.

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