portracker

portracker is a self-hosted, real-time port monitoring and service discovery tool for mapping what is actually running on your servers. It scans the host and supported platforms (like Docker and TrueNAS) to provide an up-to-date view of services and their exposed ports, reducing errors from manual tracking.

Key Features

• Automatic discovery of running services and their TCP ports on the host
• Docker-aware discovery, including detection of internal container ports vs published host ports
• TrueNAS collector with optional API key support for enhanced inventory details and VM/LXC visibility
• Peer-to-peer monitoring to aggregate multiple portracker instances into a single dashboard
• Hierarchical grouping to nest systems (for example, VMs under a physical host)
• Lightweight deployment with an embedded SQLite database (no external DB required)
• Modern responsive UI with live filtering, dark mode, and multiple layout views
• Optional built-in authentication to restrict dashboard access

Use Cases

• Maintain an accurate inventory of ports and services across homelab or small server fleets
• Troubleshoot port conflicts and reduce deployment failures during container/app rollouts
• Get a consolidated view of ports and services across multiple hosts via peering

Limitations and Considerations

• Some discovery features require elevated container privileges (host PID and additional capabilities) to inspect system ports
• TrueNAS VM discovery may be read-only unless a separate portracker instance runs on each VM

portracker is a practical choice for administrators who want continuous visibility into host and container networking without maintaining spreadsheets. Its embedded storage and peering model make it easy to deploy broadly and centralize service mapping.