DAY 4 · MODULE 2

Firewall Security

Understand inbound/outbound rules, ports, protocols and allow/deny decisions.

50 minRule-decision simulationIn Progress
01 · LEARN

Understand the concept

Firewall rules
Inbound traffic
Outbound traffic
Protocol
Port
Allow
Block
Default deny concept
Why this matters

Firewalls reduce unwanted network exposure by controlling which traffic may reach protected systems.

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 firewall flow visualizer.
  2. Review a prepared rule set.
  3. Predict whether sample connections are allowed or blocked.
  4. Later apply rules only inside the isolated training lab.
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

Rule examples:
ALLOW TCP 80
ALLOW TCP 443
BLOCK TCP 23

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 rules allowing 80/443 and blocking 23, predict the result of three connection attempts and justify each result.

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