Comments on: OpenSnitch: The Must-Have Application Firewall for Linux

By: Bob Robertson

Bob Robertson — Wed, 31 Dec 2025 17:03:06 +0000

Tried it on Fedora and ran into dependency issues. Ended up compiling from source. Needs better distro support or at least a flatpak/snap option.

By: sammy nulls

sammy nulls — Wed, 31 Dec 2025 00:21:37 +0000

I’ve been running OpenSnitch for quite some time now, currently on Fedora Silverblue 43 (RPM). It truly is fantastic and brings a great deal of peace of mind. Being able to see what applications are doing and block things you simply don’t like is pure bliss. No doubt it takes some time and a bit of tweaking to set up your rules, but stick with it—the end result is most certainly worth it.

By: Ravi Saive

Ravi Saive — Mon, 19 May 2025 04:48:20 +0000

In reply to Tice.

@Tice,

It looks like the OpenSnitch GUI isn’t starting properly because the required theme package (qt-material) isn’t installed.

You can try running the following command to fix it:

pip3 install qt-material

That should resolve the “Themes not available” warning and hopefully allow the GUI to launch correctly.

As for the concern about not being able to configure network rules without the GUI — you’re absolutely right. The GUI is the main way to manage and allow/deny connections interactively, so getting it running is important.

Let me know if the GUI still doesn’t start after installing the theme package — happy to help you troubleshoot further.

By: dragonmouth

dragonmouth — Fri, 16 May 2025 11:14:21 +0000

In reply to Ravi Saive.

Thanks

By: Tice

Tice — Fri, 16 May 2025 07:54:01 +0000

UI isn’t starting:

Themes not available. Install qt-material if you want to change GUI’s appearance:

pip3 install qt-material

Loaded network aliases from /usr/lib/python3/dist-packages/opensnitch/network_aliases.json
~ OpenSnitch GUI – 1.7.0 ~
protobuf: 3.12.4 – grpc: 1.30.2

Hope it will not cause connection problems now which I can’t configure without GUI.