# macOS Firewall ## Third-Party Options ### Little Snitch (Paid) A network monitor that shows where your Mac connects to on the Internet. - **Website:** [little snitch](https://www.obdev.at/products/littlesnitch/index.html) - Real-time connection alerts - Fine-grained allow/deny rules - Logging and reporting ### LuLu (Open Source) Free, open-source firewall for macOS. - **Website:** [objective-see.org/lulu](https://objective-see.org/products/lulu.html) - Blocks unknown outgoing connections - Protects privacy - GitHub: [objective-see/LuLu](https://github.com/objective-see/LuLu) ## macOS Built-in Firewall macOS includes a built-in Application Firewall (System Settings > Network > Firewall). **Features:** - Block incoming connections - Sign and verify apps - Enable stealth mode