firewall-basic-setup.md

Lab 1: Basic Firewall Setup

Objective

Set up a basic firewall on a virtual machine or network device to control incoming and outgoing traffic.

Requirements

• Virtual machine (Windows/Linux) or physical device
• Firewall software (e.g., iptables, pfSense, UFW)

Steps

1. Install firewall software (if not built-in).
2. Verify current firewall status:

sudo ufw status

Enable firewall:

sudo ufw enable

Allow essential services (e.g., SSH, HTTP):

sudo ufw allow ssh
sudo ufw allow http

• Deny all other incoming connections by default.

• Test firewall rules by attempting connections from another device.

Expected Outcome

• Only allowed services are accessible.

• Firewall blocks unauthorized connections.

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