LuLu download | SourceForge.net

LuLu is a free, open-source firewall for macOS developed by Objective-See. It blocks unauthorized outgoing network connections, allowing users to monitor and control which applications can transmit data externally. Designed for privacy and security, LuLu provides real-time prompts, rule-based filtering, and an intuitive interface, making it a valuable tool for Mac users seeking visibility over their system’s network behavior.

Features

Blocks outgoing network connections by default
Provides real-time alerts for unknown processes
Customizable rules for apps and ports
Sleek, native macOS interface
Open-source and auditable for transparency
Supports whitelisting signed and trusted applications

Project Samples

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License

GNU General Public License version 3.0 (GPLv3)

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Additional Project Details

Operating Systems

Mac

Programming Language

Objective C

Related Categories

Objective C Firewall Software

Registered

2025-07-24

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