🔥 UFW Firewall (Extended)

UFW (Uncomplicated Firewall) is a simple interface for managing firewall rules.

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🔧 Basic Commands

sudo ufw allow 22
sudo ufw allow 80
sudo ufw allow 443
sudo ufw enable
sudo ufw status verbose

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🧩 Default Policies

sudo ufw default deny incoming
sudo ufw default allow outgoing

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🧱 Application Profiles

Located in:

/etc/ufw/applications.d/

Example:

[MyApp]
title=My Application
description=Custom app
ports=8080/tcp

Enable:

sudo ufw allow MyApp

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🚨 Troubleshooting

• Docker may bypass UFW
• Check rule order
• Use ufw status numbered to delete rules