In this tutorial we will show you how to install UFW Firewall on Ubuntu 18.04 LTS. For those of you who didn’t know, The default firewall configuration tool for Ubuntu is ufw. Developed to ease iptables firewall setup, ufw provides a user friendly way to produce an IPv4 or IPv6 host-based antivirus. By default UFW is disabled.
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 through the step by step installation UFW Firewall on an Ubuntu 16.04 Bionic Beaver server.
Setup UFW Firewall on Ubuntu 18.04 LTS Bionic Beaver
Step 1. First make sure that all your system packages are up-to-date by running these following apt-get commands in the terminal.
Step 2. Installing UFW Firewall on Ubuntu 18.04 LTS.
In Ubuntu 18.04, UFW is installed by default. If not, you can easily install it by running the following command:
To check whether ufw is running run:
After installation, UFW is deactivated. If you configure your server via SSH, it is important to release SSH before you enable UFW:
Attention! The following are examples, please use only if you know what you are doing!
Allow Port Ranges:
To see all services that can be allowed or denied in the system check out the /etc/services file:
fsp 21/udp fspd
ssh 22/tcp # SSH Remote Login Protocol
smtp 25/tcp mail
time 37/tcp timserver
time 37/udp timserver
rlp 39/udp resource # resource location
nameserver 42/tcp name # IEN 116
whois 43/tcp nicname
tacacs 49/tcp # Login Host Protocol (TACACS)
re-mail-ck 50/tcp # Remote Mail Checking Protocol
domain 53/tcp # Domain Name Server
For more usage commands you can use the –help flag:
Install gufw package if you wish to manage our UFW firewall via graphical user interface application:
Once installed, start Gufw by searching your start menu:
Congratulation’s! You have successfully install and setup UFW. Thanks for using this tutorial for installing UFW Firewall on your Ubuntu 18.04 Bionic Beaver system. For additional help or useful information, we recommend you to check the official UFW Firewall web site.