Firewall

Configuring a firewall in Cisco Packet Tracer (CPT) is a valuable skill for controlling the flow of traffic in a network. Firewalls act like security guards, determining what kind of data can enter or exit a network based on predefined rules.

Here's how to configure a basic firewall in Cisco Packet Tracer, explained in a way that high school students can understand:

Steps:

1. Launch Packet Tracer and Create Your Network:

• Open Cisco Packet Tracer.

• Drag and drop the devices you want in your network. This might include routers, switches, and computers (end devices).

2. Add a Firewall:

• In the device selection pane, you'll find a category for Security Devices or Firewalls. Drag a firewall onto your workspace.

• Connect the firewall to your network. Usually, one side will connect to your internal LAN, and the other will connect to an external device like a router that leads to the Internet.

3. Access the Firewall:

• Click on the firewall to open its configuration window.

4. Go to the CLI (Command Line Interface):

• Open the CLI tab on the firewall device.

5. Enable Configuration Mode:

• Type enable to go into privileged mode.

• Then type configure terminal or conf t to enter global configuration mode.

8. Test the Configuration:

• Finally, use Packet Tracer's simulation features to send packets through the network. See if they're allowed or blocked as you've configured.

9. Save Your Settings:

• Don't forget to save your settings by typing write memory or copy running-config startup-config.

And there you go! You've just set up a basic firewall in Cisco Packet Tracer. Understanding how to configure a firewall is essential for anyone interested in ICT support, digital skills tutoring, and especially cybersecurity. It allows you to set up strong network defenses and control how data moves through your network.