NetBlocker is a powerful, cross-platform application designed to give you total control over your network privacy. Inspired by "Radio Silence," it provides a sleek and intuitive interface to monitor active connections and block any application from accessing the internet with a single click.

Built with Avalonia UI and .NET, NetBlocker offers a native-like experience on Windows, macOS, and Linux, ensuring your data stays exactly where you want it.

• 🚀 Real-time Monitoring: Instantly see every outgoing connection from your system, including process names, remote addresses, and ports.
• 🚫 One-Click Blocking: Stop any application from accessing the network immediately. No complex firewall rules to manage.
• 🍏 macOS optimization: Native support for macOS including pfctl integration, system notifications, and high-performance monitoring.
• 📊 Analytics Dashboard: A dedicated "Broadway" view to track your network history, total connections, and most active applications.
• 🔄 Auto-Persistence: Your blocking rules are stored in a secure local database and automatically re-applied on system startup.
• 🌙 Modern UI: A beautiful, dark-themed interface with smooth animations and high-resolution icons.

NetBlocker is distributed as a standalone portable application. No complex installation is required.

Head over to the GitHub Releases page and download the archive for your operating system:

• NetBlocker-win-x64.zip (Windows)
• NetBlocker-linux-x64.tar.gz (Linux)
• NetBlocker-osx-x64.app.zip / NetBlocker-osx-arm64.app.zip (macOS)

Extract the archive and run the executable. Note: NetBlocker requires administrative privileges to manage firewall rules.

• Right-click NetBlocker.exe and select "Run as Administrator".

• Drag NetBlocker.app to your Applications folder.
• Because it modifies system firewall rules, you may need to run it with elevated permissions or authorize it via System Settings.
• Tip: If launching from terminal, use sudo ./NetBlocker.app/Contents/MacOS/NetBlocker.

• Ensure iptables is installed.
• Run with sudo ./NetBlocker.

Want to build NetBlocker from source or understand how it works? Check out documentation:

• 🏗️ Architecture Docs: Deep dive into the project structure and cross-platform implementation.
• ╓ Build Guide: How to use our automated build scripts for all platforms.

This project is licensed under the MIT License - see the LICENSE file for details.

_{— application was written using Gemini 3 agents.}