LuLu on a Mac
Free open-source outbound firewall (macOS app) · Security Tools
LuLu (Objective-See) is a free, open-source firewall that alerts on and blocks unknown *outbound* connections — the thing macOS's built-in Application Firewall doesn't do. Install the app cask; rules are managed in its menu-bar UI. The Security pane's firewall section offers one-click install.
Run LuLu with FrontierStack
FrontierStack lists LuLu in its Security Tools catalog. Install or connect it from one place, then monitor its status, ports and certificate, secure it with the firewall and Malware Audit, and back it up.
Run it all from one Mac app.
FrontierStack installs, monitors and secures the whole stack — locally and across your fleet — from a single native macOS app.
Download FrontierStack