# evilsocket/opensnitch

OpenSnitch is a GNU/Linux interactive application firewall inspired by Little Snitch.

Repository: https://github.com/evilsocket/opensnitch
Canonical: https://ross.abutalabs.com/products/opensnitch
Language: Python
License: GPL-3.0
License Family: copyleft
Topics: application-firewall, firewall, linux, networking, security, data-breach
Last push: 2026-07-26T23:34:20+00:00

## Health v2 (maintenance only)
Score: 79/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 94, release rhythm 49, longevity 100
- inputs: {"age_days": 3426, "days_push": 38, "days_rel": 262, "gap_med": 57, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 14009, forks 657 (observed 2026-08-28T04:11:05.304355+00:00)

## What it is
OpenSnitch is a GNU/Linux interactive application firewall inspired by Little Snitch, intercepting and filtering outbound connections per application. It includes a GUI for managing rules, blocking ads/trackers/malware domains system-wide, configuring nftables, and managing multiple nodes centrally.

## Use cases
- block an app from phoning home on linux
- interactive outbound connection firewall like little snitch
- block ads and trackers system wide
- monitor which applications make network connections
- manage firewall rules across multiple linux machines
- integrate application firewall events into a SIEM

## When to choose
- you run GNU/Linux and want per-application outbound traffic control with prompts
- you want a GUI to manage nftables and blocklists system-wide
- you need centralized management of firewall rules across several hosts

## When to avoid
- you need a firewall on macOS or Windows
- you only need simple inbound port filtering without application awareness
- you cannot run a daemon with root privileges

## Facets
- artifact type: application
- maturity: active
- function: security, networking, monitoring, gui
- domain: security, networking, privacy, developer-tools
- platform: self-hosted
- tags: application-firewall, outbound-filtering, little-snitch-alternative, nftables, interactive-firewall, linux, desktop

## Member repositories
- evilsocket/opensnitch (main) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:05.304355+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:12:52.818897+00:00, confidence not recorded.
  - readme: https://github.com/evilsocket/opensnitch (fetched 2026-08-28T04:11:05.304355+00:00, sha 3d1220365a06)
- Data as of 2026-08-30T08:39:29.467469+00:00.