Uncomplicated Firewall (UFW) is a program for managing a netfilterfirewall designed to be easy to use. It uses a command-line interface consisting of a small number of simple commands, and uses iptables for configuration. UFW is available by default in all Ubuntu installations after 8.04 LTS.[1]
Gufw is intended to be an easy, intuitive graphical user interface for managing Uncomplicated Firewall. It supports common tasks such as allowing or blocking pre-configured, common P2P, or individual ports. Gufw has been designed for Ubuntu, but is also available in Debian-based distributions and in Arch Linux; anywhere Python, GTK and UFW are available.