OPNsense
Open source firewall and routing platform for network security
4.7k stars 983 forks last commit first released BSD-2-Clause
Actively maintained
Last commit 26 Aug 2026.
OPNsense is an open source firewall and routing platform used to secure and manage networks. It combines a web-based management interface with a systems backend and API to configure firewalling, routing, and related network services.
Key Features
- Web-based GUI for firewall, routing, and system management
- Built-in API for automation and integrations
- VPN capabilities for secure remote access and site-to-site connectivity
- Captive portal support for guest and managed network access
- Traffic shaping and policy-based controls for bandwidth management
- Extensible platform with additional services typically used at the network edge
Use Cases
- Perimeter firewall and router for a home lab or small business network
- VPN gateway for remote workers or inter-site connectivity
- Guest Wi-Fi access control using a captive portal
Limitations and Considerations
- Some advanced features and tooling are reserved for the Business Edition
OPNsense is well-suited for users who want a modern, verifiable, and configurable firewall/router stack with a strong web UI and automation-friendly API. It can serve as a central edge device for both homelab and professional network deployments.
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