Portmaster is a free, open-source application firewall that monitors all network activity on your computer. It auto-blocks trackers system-wide, lets you set global or per-app rules, and even restricts connections by country. Key features:

🔒 System-wide tracker blocking with customizable rules

🌍 Country-based restrictions for tighter control over connections

⚙️ Per-app network policies for granular privacy management

🚀 Integrates with Safing’s SPN (privacy network) (paid) for extra anonymity

🧩 Actively developed, open-source, and community-driven

Perfect for privacy-conscious users who want robust, transparent control over their network traffic without juggling multiple tools.