Gufw

A firewall can be the single most important thing one needs to manage the security of their GNU/Linux machine and network. GNU/Linux has a well known powerful firewall called iptables. iptables is a command-line firewall utility that uses policy chains to allow or block traffic. Setting up iptables firewall can be hard for someone coming from a pure Windows world where you can have a GUI to point and click to do what you need, it can feel almost heart pounding to move around the command line. Plus many distros like Ubuntu have the firewall turned off by default and there is no easy way to start it up. Getting the firewall controlled like any other services requires writing a few scripts, hardly an everyday task for a common user. There are GUI front-ends for iptables. Gufw is a simple one to look at.

Gufw is an open source application that provides users with a very easy graphical user interface (GUI) for iptables command-line interface, which lets anyone manage Linux kernel’s packet filtering system. To enable the firewall, all you have to do is check the Enabled button and the default will be set to Deny for incoming traffic and Allow for outgoing traffic.Gufw supports common tasks such as allowing or blocking pre-configured, like Plex, Dropbox, steam, common p2p, or individual port(s), and many others.

Gufw's graphical user interface is written using the GTK+ GUI toolkit and Glade. It is compatible with many desktop environments, including Budgie, Cinnamon, GNOME, KDE Plasma, LXQt, MATE, Openbox, Xfce and Deepin.