How To Setup UFW Firewall on Debian 10

Setup UFW Firewall on Debian 10

In this tutorial, we will show you how to setup UFW Firewall on Debian 10. For those of you who didn’t know, UFW (Uncomplicated Firewall) is a user-friendly front-end for managing iptables firewall rules. Its main goal is to make managing iptables easier or, as the name says, uncomplicated.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step to set up UFW Firewall on a Debian 10 (Buster) server.


  • A server running one of the following operating systems: Debian 10 (Buster).
  • It’s recommended that you use a fresh OS install to prevent any potential issues.
  • A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Setup UFW Firewall on Debian 10 Buster

Step 1. Before we install any software, it’s important to make sure your system is up to date by running the following apt commands in the terminal:

sudo apt update
sudo apt upgrade

Step 2. Installing UFW Firewall on Debian 10.

UFW is available right in the Debian repositories, Install UFW by using the following command:

sudo apt install ufw

To check whether ufw is running run:

sudo ufw status verbose

Step 3. Setup UFW.

The first step in setting up any firewall is setting your default behaviors. With UFW you can set these things by using the following commands:

sudo ufw default deny incoming
sudo ufw default allow outgoing
  • How to Allow Ports using UFW, check this out example the command:
sudo ufw allow 22
  • How to Allow Interfaces using UFW, check this out example the command:
sudo ufw allow in on eth0 to any port 22
  • How to Allow Protocol, check this out example the command:
sudo ufw allow in on eth0 to any port 22
  • How to Allow IP Addresses, check this out example the command:
sudo ufw allow from to any port 22

For more usage commands you can use the --help flag:

ufw --help

Congratulations! You have successfully set up UFW Firewall. Thanks for using this tutorial for Setting up UFW Firewall on your Debian 10 Buster system. For additional help or useful information, we recommend you check the official UFW Firewall website.

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r00t is a seasoned Linux system administrator with a wealth of experience in the field. Known for his contributions to, r00t has authored numerous tutorials and guides, helping users navigate the complexities of Linux systems. His expertise spans across various Linux distributions, including Ubuntu, CentOS, and Debian. r00t's work is characterized by his ability to simplify complex concepts, making Linux more accessible to users of all skill levels. His dedication to the Linux community and his commitment to sharing knowledge makes him a respected figure in the field.
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