1. Linux → https://github.com/evilsocket/opensnitch
2. Windows → https://www.glasswire.com/
3. Windows (open source) → https://github.com/henrypp/simplewall
4. Windows → https://safing.io/
In Snitch – A friendlier ss/netstatevilsocket
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
14 sourcesit sounds like you want https://github.com/evilsocket/opensnitch
In Show HN: Network Monitor – a GUI to spot anomalous connections on your LinuxShow HN: I made a Rust Terminal UI for OpenSnitch, a Linux application firewall
I made a Terminal UI for OpenSnitch[1], an interactive application firewall for Linux inspired by Little Snitch. I’ve always wanted to create a TUI and found the perfect excuse to make this for usage on one of my headless servers.
I wrote this in Rust to force myself to learn more, viz. async features. Super open to feedback and contributions!
[1] https://github.com/evilsocket/opensnitch
6 points · Open discussionprobably no:
https://github.com/evilsocket/opensnitch/discussions/1290
that malware campaign is still active.
In NPM flooded with malicious packages downloaded more than 86k timesspecially interpreters: python, perl, npm, etc.
https://github.com/evilsocket/opensnitch/wiki/Rules#best-pra...
In I almost got hacked by a 'job interview'ptcpdump:
https://github.com/mozillazg/ptcpdump :
> ptcpdump is a tcpdump-compatible packet analyzer powered by eBPF, automatically annotating packets with process/container/pod metadata when detectable. Inspired by jschwinger233/skbdump.
awesome-ebpf > Tools:
https://github.com/zoidyzoidzoid/awesome-ebpf#tools
opensnitch is an egress firewall that displays PIDs: https://github.com/evilsocket/opensnitch
edgeshark: https://github.com/siemens/edgeshark :
> Discover and capture container network traffic from your comfy desktop Wireshark, using a containerized service and a Wireshark plugin.
Looks like it's possible to select containers from a GUI form with edgeshark. Perhaps something similar for process selection?
In Wireshark 4.6.0 Supports macOS Pktap Metadata (PID, Process Name, etc.)There are numerous privacy issues in distros, some known, most probably unknown, some examples from Debian:
https://wiki.debian.org/PrivacyIssues
Luckily there are things like opensnitch that can block some of these issues:
https://github.com/evilsocket/opensnitch
In StarDict sends X11 clipboard to remote serversLooks really streamlined!
Currently, when I need to focus, I use a separate device configured to block everything except 2-3 domains I really need to minimize distractions. What really makes Sinkzone interesting is the scheduling with focus mode which can be incredible useful. My current firewall, OpenSnitch only lets you toggle all rules at once, so Sinkzone could be useful for allowing just the focus domains.
I think a useful feature to consider is having different profiles which would essentially be collections of domains to allow. So you could have "focus", but also "work" or "kids" as well allowing for more flexibility.
As I previously mentioned, I'm currently using OpenSnitch [1] as a system-level firewall that has a similar allowlist-only functionality. While the popups to allow/reject a connection initially disturb your workflow,
Read the rest
after a short period of usage, you end up with a small collection of rules and you'll pretty much only see them again when browsing new websites. The advantage over DNS-level blocking is that you also get to block per process and not just device (or network). Since it uses eBPF, processes can't get around it by using a different DNS server or something. I'm really missing profiles and scheduling though, so I hope you can build a viable alternative to switch to!
[1]: https://github.com/evilsocket/opensnitch
For Linux you have OpenSnitch https://github.com/evilsocket/opensnitch
This is priceless. Install it, start the service, put it to start at boot.
You can use this in two ways: let it ask for every connection or add some you trust and want to allow forever.
Anyway, one or two days later, you have almost you need allowed and you're already surprise how many programs connect to where.
You really have no idea what "phones" home until you use it.
In First Contact – New in Little Snitch Mini 1.8I've found firejail to be a useful tool for this (https://github.com/netblue30/firejail), and additionally use opensnitch (https://github.com/evilsocket/opensnitch) to monitor for unexpected network requests.
For CI/CD using something like ArgoCD let's you avoid giving CI direct access to prod - it still needs write access to a git repo, and ideally some read access to Argo to check if deployment succeeded but it limits the surface area.
In Tj-actions/changed-files GitHub Action Compromised – used by over 23K reposRansomware malware targeting Linux Desktop users spotted in the wild
12 points · Open discussionThere is OpenSnitch [0] on Linux, but it us a bit clumsy to setup. I tried it once and didn't get far, but have it again on my todo list. Not aware of something else on Linux.
On Android there is NetGuard [1] which is awesome (not affiliated, just a happy customer).
[0] https://github.com/evilsocket/opensnitch
[1] https://netguard.me/
In Sniffnet – monitor your Internet trafficThere’s also LuLu from Objective-See (https://objective-see.org/products/lulu.html),
and for Linux, there’s OpenSnitch (https://github.com/evilsocket/opensnitch)
In Sniffnet – monitor your Internet trafficopensnitch
https://github.com/evilsocket/opensnitch
In Sniffnet – monitor your Internet traffic