Portmaster is an open-source network monitoring and control application designed to give individuals greater visibility and authority over their internet traffic. It runs quietly in the background, automatically analyzing connections and providing detailed insights into how applications communicate online. With clear dashboards and intuitive controls, it empowers people to understand and manage their digital environment with confidence.

Portmaster places a strong focus on privacy. It blocks trackers, unwanted connections, and suspicious activities before they can compromise security. Instead of relying solely on external services, it operates locally, ensuring that sensitive data remains under personal control. This makes it an effective safeguard against intrusive monitoring and hidden processes that often occur without awareness.

Customization is another central element. Users can create rules, allow or deny connections, and tailor settings to meet specific needs. From simple blocking to advanced filtering, Portmaster adapts to different levels of technical knowledge. This flexibility ensures that both beginners and more advanced individuals can benefit from its capabilities without unnecessary complexity.

By combining transparency, privacy protection, and control, Portmaster turns networking into something understandable and manageable. It enables people to reclaim authority over their connections and creates a safer, clearer online experience where activity is visible and controllable at every step.

Key Features:

• Network Traffic Control – Monitors all internet connections on the system and allows users to block or allow them.
• Automatic Privacy Protection – Blocks trackers, ads, and unwanted connections at the network level.
• DNS Customization – Lets users choose secure DNS services, such as DNS-over-HTTPS or DNS-over-TLS, for safer browsing.
• Per-App Settings – Provides fine-grained rules and filters for individual applications.
• Connection Alerts – Notifies users when apps attempt to connect online, enabling real-time decision-making.
• Open-Source Transparency – The codebase is fully open-source, ensuring auditability and trust.
• No Cloud Dependency – Runs locally on the machine, keeping control in the user’s hands without relying on external servers.
• User-Friendly Interface – Offers an accessible dashboard to manage privacy and security without complex configuration.