Anyone using Linux can also try OpenSnitch, which is free to own: https://github.com/evilsocket/opensnitch
In Little Snitch: Network Monitor and Application Firewall for macOSevilsocket
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
6 sources5th Circuit rules ISP should have terminated Internet users accused of piracy
"Accused of"? Surely they meant, "Proven guilty of" ?? I ask because there are applications that can turn a persons internet connection unknowingly into a proxy or VPN server. It's a shady practice but if all one needs to get terminated is a hit from an IP address then millions of people could get disconnected with little or no recourse, could they not? If this is the case then everyone will need an easy to use UI into an eBPF monitor that records all communications into and out of their system before/after it is encrypted. [1] Not to be confused with a MitM proxy. And everyone would also need to implement something like Little Snitch or OpenSnitch [2] to limit what can talk to the internet and when or one dodgy NPM library could rue the day.
[1] - https:/
Read the rest
OpenSnitch is a GNU/Linux interactive application firewall
408 points · Open discussionHave you seen OpenSnitch? https://github.com/evilsocket/opensnitch
It's a Linux project that's replication what Little Snitch does on macOS - it doesn't decrypt TLS secured data but it does show and allow blocking of network connections (even if it can't see exactly what's going on inside this connections).
Combining eCapture features with OpenSnitch would be awesome. It'd be great if as well as tracking all network connection, you could flag connections sending specific data (like your name, email address, or phone number) to unexpected servers.
In Capturing Linux SSL/TLS plaintext without a CA certificate using eBPFOpenSnitch: GNU/Linux interactive application firewall inspired by Little Snitch
9 points · Open discussionThere’s more tooling for non-professionals to keep a leash on desktop app network usage, too, like LuLu[0] and OpenSnitch[1]. There’s ways around these tools as there is with anything else, but it raises the bar a bit since the user is unlikely to let random programs connect to servers they have no good reason to connect to, once made aware that the attempts are being made.
It’s not as reasonable for the layman to do this on the web, since it’s par for the course for a single visit to a big commercial website to kick off connections to dozens of unintelligible domains, and to sometimes break if these connections aren’t allowed. OS-level tools like LuLu aren’t of much help here because significant limitations on the servers a browser can connect to essentially break the browser, which leaves you with extensions like NoScript and uMatrix wh
Read the rest
ich for the explained reasons aren’t as straightforward to operate.
[0]: https://objective-see.org/products/lulu.html
[1]: https://github.com/evilsocket/opensnitch