Murus Firewall

Murus Firewall provides a graphical front‑end for the macOS built‑in PF firewall, letting users configure network‑layer rules through a simple interface. It supports advanced capabilities such as port knocking, adaptive filtering, NAT, and a high‑speed logging system, enabling monitoring and proactive blocking of unwanted traffic.

The suite includes several related tools: Vallum offers application‑layer filtering by dragging app icons to create rules, with a syntax similar to PF for power users; Snail allows per‑app bandwidth throttling, automatically adjusting limits based on connection type; Adsorb is a lightweight network‑level ad blocker that can be toggled from the menu bar; and Scudo combines basic Murus and Vallum features in a single, easy‑to‑use window for general firewall configuration.

Targeted at macOS users ranging from casual to professional, the software leverages the native PF engine while adding user‑friendly controls and additional security utilities, making it a comprehensive solution for managing inbound and outbound connections on a Mac.