An alternative that does not come with a potentially machine-bricking kernel panic bug is Opensnitch [1], last updated 14 months ago with a change to "funding.yaml" asking for donations.
A fork seems to be relatively alive [2] and I use it personally -- it works well, but is a bit of a PITA to build. Time to buy the devs a coffee...
[1] https://github.com/evilsocket/opensnitch
[2] https://github.com/gustavo-iniguez-goya/opensnitch
In Douane: Linux personal firewall with per application rule controlsevilsocket
opensnitch
Python2017–2026
evilsocket / opensnitch
opensnitch
OpenSnitch is a GNU/Linux interactive application firewall inspired by Little Snitch.
84Distinct people
101Mentions
0Explicit recommenders
14.3KGitHub stars
What to know before exploring
What it is
OpenSnitch is a GNU/Linux interactive application firewall inspired by Little Snitch.
GitHub
Where it is used
No documented product use was verified in the last source check.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
- gustavo-iniguez-goya/opensnitch · linked in 2 of the same discussions
- henrypp/simplewall · linked in 2 of the same discussions
- nathants/tiny-snitch · linked in 2 of the same discussions
Mentioned in the same Hacker News threads. That is not proof they are substitutes.
This week on Hacker News
Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 4:01:40 AM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year101 dated mentions
Observed mentions: 2017-04-17 16:24:07 UTC to 2026-10-30 19:13:07 UTC.
* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 8 | 4 | 4 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 4 | 0 | 4 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 16 | 1 | 15 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 10 | 0 | 10 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 18 | 1 | 17 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 11 | 0 | 11 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 6 | 2 | 4 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 14 | 2 | 12 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 12 | 1 | 11 |
From the project README
An excerpt from the repository, fetched Nov 13, 2026.
Read the project’s introduction
Join the project community on our server!
OpenSnitch is a GNU/Linux application firewall.
•• Key Features • Download • Installation • Usage examples • In the press ••
Key features
Interactive outbound connections filtering.
Block ads, trackers or malware domains system wide.
Ability to configure system firewall from the GUI (nftables).
Configure input policy, allow inbound services, etc.
Manage multiple nodes from a centralized GUI.
SIEM integration
Download
Download deb/rpm packages for your system from https://github.com/evilsocket/opensnitch/releases
Installation
deb
$ sudo apt install ./opensnitch*.deb ./python3-opensnitch-ui*.deb
rpm
$ sudo dnf install opensnitch*.rpm
Then run: $ opensnitch-ui or launch the GUI from the Applications menu.
Please, refer to the documentation for detailed information.
OpenSnitch in action
Examples of OpenSnitch intercepting unexpected connections:
https://github.com/evilsocket/opensnitch/discussions/categories/show-and-tell
Have you seen a connection you didn't expect? submit it!
In the press
2017 PenTest Magazine
11/2019 It's Foss
03/2020 Linux Format #232
08/2020 Linux Magazine Polska #194
08/2021 Linux Format #280
02/2022 Linux User
06/2022 Linux Magazine #259
Donations
If you find OpenSnitch useful and want to donate to the dedicated developers, you can do it from the Sponsor this project section on the right side of this repository.
You can see here who are the current maintainers of OpenSnitch:
https://github.com/evilsocket/opensnitch/commits/master
Contributors
See the list
Translating
Read the full README on GitHubWhat Hacker News says
16 sourcesThe subject of this thread are application firewalls, like Little Snitch or https://github.com/evilsocket/opensnitch.
To be fair I haven't looked at the state of Linux app firewalls in years, maybe there's something better available, but *tables is not it.
In Apple apps on Big Sur bypass some firewalls and VPNsThere's OpenSnitch, but it's a WIP: https://github.com/evilsocket/opensnitch
In Apple's apps bypass firewalls like LittleSnitch and LuLu on macOS Big SurIf you haven't come across it yet - here's OpenSnitch: https://github.com/evilsocket/opensnitch
In Ask HN: Advanced Linux users, which distribution do you run? Why?[1] https://github.com/evilsocket/opensnitch maybe?
In Why I Use Suckless ToolsI'm using opensnitch[1] and it can block snap requests.
Pretty nifty software, but it brings my machine to its knees unless I ``` sudo service opensnitchd restart ``` once in a while.
[1] https://github.com/evilsocket/opensnitch
In Ubuntu 20.04 LTS’ snap obsession has snapped me off of itI've never used this myself, but OpenSnitch appears to be a popular Linux equivalent to LittleSnitch.
[1] - https://github.com/evilsocket/opensnitch
In Darling – Run macOS software on LinuxOpenSnitch looks promising.
https://github.com/evilsocket/opensnitch
Tilix is very much like iTerm2. Simple to use too.
In Darling – Run macOS software on Linuxthere is a project called opensnitch that supposedly does similar things on linux
https://github.com/evilsocket/opensnitch
I'm not sure how active it is (no recent activity and there seem to be a lot of forks)
In Little Snitch and the deprecation of kernel extensionsOpenSnitch was on HN recently and someone wrote an alternative UI[0] for it with Fyne which is interesting.
[0] https://github.com/evilsocket/opensnitch/issues/257
In Fyne: Native Mobile UX in GoI run a newsletter[0] that has a section call "Code to read" for many language.
I tried to include small/interesting repos to do weird/cool things so people can learn about it. Eg, this code: https://github.com/evilsocket/opensnitch (UI in Python but the logic is Go)
---
[0]: https://betterdev.link
In Become a Better Developer by Reading Source Code> yes, i'm not working on it anymore and i'm not responding to issues, because i lost interest and nobody pays me for this ... if this project is so essential (?), the "Linux community" can fork it and send a PR.
https://github.com/evilsocket/opensnitch/issues/259#issuecom...
In OpenSnitch is a GNU/Linux port of the Little Snitch application firewallThis project is no longer maintained.
https://github.com/evilsocket/opensnitch/issues/259
In OpenSnitch is a GNU/Linux port of the Little Snitch application firewall> They often rely on process paths to identify applications, but that can be easily bypassed by using a reputable/plausible program as a lackey, or more sophisticated techniques like process hollowing
Even that is difficult to achieve and possibly opens up additional attack surfaces. On Linux, AFAIK, there's no built in method to filter packets on the basis of the path of the sending process, so firewalls like this have to be adding a kernel module (like Douane does), which adds attack surface, or basically attempting to work out the path on a "best effort" basis, which seems to be what OpenSnitch does, with mixed results [1] [2].
Seems like this is probably a useful tool to figure out programs that are talking to servers when they're expected to be silent, but I probably wouldn't rely on it for security, at least until / unless more robu
Read the rest
st application level filtering is built into the Linux kernel. For better or worse, it seems like the intended approach for Linux systems is to rely on the Unix permissions model: a program running under a user is allowed all the permissions that user has. The fact that this isn't really ideal for single-user desktops notwithstanding.
[1] https://github.com/evilsocket/opensnitch/issues/12
[2] https://github.com/evilsocket/opensnitch/issues/171 <- apparently some applications bypass OpenSnitch by accident, so it wouldn't be surprising to find out that malicious programs could / are doing it on purpose.
I believe the project may be dead -- https://github.com/evilsocket/opensnitch/issues/259 -- but I see there has been some activity since then.
In OpenSnitch is a GNU/Linux port of the Little Snitch application firewallShowing the 15 most recent of 16 sources. Enable JavaScript to search and browse every indexed mention.