OpenSnitch: The Little Snitch application like firewall tool for Linux

last updated in Categories Open Source, Python

Little Snitch is a traditional software firewall for macOS. You can use it to monitor applications, preventing or permitting them to connect to attached networks through advanced rules. OpenSnitch is a GNU/Linux port of the Little Snitch application firewall written in Python.

The software is still in early stage of development, and alpha quality software, don’t rely on it (yet) for your computer security. However, this software can be very useful for Linux desktop users.


Install required software using apt-get command:
$ sudo apt-get install build-essential python-dev python-setuptools libnetfilter-queue-dev python-qt4 python-gtk2
Sample outputs:

Fig.01: Installed required build tools
Fig.01: Installed required build tools

Clone the repo:
$ git clone
Install it:
$ cd opensnitch
$ sudo python install

Run it:
$ sudo opensnitch
Sample outputs:
Fig.02: Running opensnitch
Fig.02: Running opensnitch

The Little Snitch application firewall will start working immediately and will show dialog as follows:
Fig.03: Opensnitch in action
Fig.03: Opensnitch in action

You can allow, deny or whitelist apps. I hope the author will continue work on this app and releases a beta and stable version for the good of GNU/Linux users. For more info visit project home page here.

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

1 comment

    Still, have a question? Get help on our forum!