Safing

Portmaster is a free and open-source application firewall that provides a range of features to increase privacy and security. Key features include the ability to monitor all network activity, auto-block trackers system-wide, and set global and per-app settings. For example, users can block all advertisements and trackers for every application, or completely cut off applications from the Internet. Portmaster also allows users to add their own rules and block individual domains. From a technical perspective, Portmaster is available for Windows, Debian/Ubuntu, and Fedora, and is free and open-source. Use cases for Portmaster include protecting devices from malicious connections, controlling network activity for specific applications, and blocking connections to specific countries. One unique differentiator of Portmaster is its ability to provide system-wide protection, rather than just protecting individual browsers. Overall, Portmaster provides a powerful and flexible solution for users looking to increase their privacy and security.