In this tutorial we will show you how to install UFW Firewall on Ubuntu 16.04. We will also install and configure its prerequisites.The UFW (uncomplicated firewall) is a front-end for managing firewall rules and it is easy to utilize for host-based firewalls. The UFW is used through the command line interface and plans to make firewall configuration simple.
I recommend to use a minimal Ubuntu server setup as a basis for the tutorial, that can be a virtual or a root server image with an Ubuntu 16.04 minimal install from a web hosting company or you use our minimal server tutorial to install a server from scratch.
Install UFW Firewall on Ubuntu 16.04
Step 1. First, ensure your system and apt package lists are fully up-to-date by running the following:
apt-get update -y apt-get upgrade -y
Step 2. Installing UFW Firewall.
UFW is installed by default with Ubuntu, if not installed then we will install them using the below command:
sudo apt-get install ufw
Check the install:
And that is it, not much to the install and setup here. Nothing to enable or restart with systemd since UFW is a wrapper for iptables and netfilters:
Once enabled, ufw will be active and will start on system boot. Please note that all the incoming connections will be denied by default while the outgoing connections will be allowed. To check the default configuration, you can use the following command:
sudo ufw show raw
Attention! The following are examples, please use only if you know what you are doing!
Allow connections to SSH:
sudo ufw allow ssh
Enable other services:
sudo ufw allow 80/tcp sudo ufw allow 443/tcp sudo ufw allow 21/tcp
Allow connections from specific IP addresses:
sudo ufw allow from 18.104.22.168
For more usage commands you can use the –help flag:
sudo ufw --help
Most common uwf commands:
enable enables the firewall disable disables the firewall default ARG set default policy logging LEVEL set logging to LEVEL allow ARGS add allow rule deny ARGS add deny rule reject ARGS add reject rule limit ARGS add limit rule delete RULE|NUM delete RULE insert NUM RULE insert RULE at NUM route RULE add route RULE route delete RULE|NUM delete route RULE route insert NUM RULE insert route RULE at NUM reload reload firewall reset reset firewall status show firewall status status numbered show firewall status as numbered list of RULES status verbose show verbose firewall status show ARG show firewall report version display version information Application profile commands: app list list application profiles app info PROFILE show information on PROFILE app update PROFILE update PROFILE app default ARG set default application policy
Congratulation’s! You have successfully install and configured UFW Firewall on your Ubuntu 16.04 server. Thanks for using this tutorial installing UFW Firewall on Ubuntu 16.04 LTS (Xenial Xerus) system.