obdev

obdev / littlesnitch-linux

Public

Open Source components of Little Snitch for Linux

653
21
100% credibility
Found Apr 14, 2026 at 653 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
Rust
AI Summary

Open-source kernel-level network monitor and firewall for Linux that shows and controls app connections with blocklists and rules.

How It Works

1
🔍 Discover network monitor

You hear about a simple tool that watches what apps connect to the internet, just like a friendly guard for your computer.

2
📥 Get the demo

Download the free demo app and run it with a quick click—no complicated setup needed.

3
🚀 Start watching

The app quietly starts monitoring your network connections in real-time.

4
🌐 See live activity

Open the web page to view a clear list of every app trying to phone home, with details on where they're reaching.

5
🛡️ Load blocklists

Add ready-made lists of known bad sites to automatically block sneaky connections.

6
Set your rules
✅
Allow trusted

Quickly approve apps you know and love.

❌
Block unwanted

Stop suspicious traffic with one tap.

🛡️ Safe and in control

Relax knowing your computer only talks to places you approve, with full visibility anytime.

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Star Growth

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AI-Generated Review

What is littlesnitch-linux?

Little Snitch for Linux brings macOS-style per-app network monitoring to Linux desktops and servers. It uses Rust and eBPF to track connections in the kernel, letting you block domains, IPs, or ports via efficient blocklists and rules. Users get a demo app that loads blocked_hosts.txt or blocked_domains.txt files, attaches to cgroups for real-time event polling, and serves a JavaScript web UI for traffic views—core open source components of a full firewall product.

Why is it gaining traction?

Unlike iptables or nftables, it hooks directly into socket creation and packet flows with eBPF for zero-overhead tracking, handling thousands of connections without userspace bottlenecks. 650 stars reflect demand for Little Snitch-like alerts on Linux, with fast binary-searched blocklists and process-aware rules that scale better than scripted alternatives. Devs dig the aya-rs integration for custom eBPF tinkering.

Who should use this?

Linux sysadmins securing workstations against rogue apps phoning home, security teams auditing containerized services, or embedded devs filtering IoT network chatter. Ideal for cgroup-based setups like Docker or systemd where you need granular outbound controls without full firewall rewrites.

Verdict

Promising eBPF foundation for Linux network filtering (1.0% credibility score), but at 650 stars it's an early prototype—proprietary bits remain closed, docs are README-only, no production tests. Fork and extend the demo for custom little components, but wait for stability before deploying.

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