OPNsense® is an open source, feature rich firewall and routing platform, offering cutting-edge network protection.

We’ve made digital security accessible to everyone. With our free OPNsense® platform, you get all the features of expensive commercial firewalls and more. Enjoy open and verifiable sources in a product developed with and for a large user community.

Can’t afford downtime? Use our automatic hardware failover with state synchronization. By utilizing the Common Address Redundancy Protocol (CARP), you can achieve the highest possible availability.

Reporting & monitoring

A modern approach to RRD graphs with options to zoom in and export data. Your favorite NetFlow analyzer shows most active users, interfaces, ports, and applications.

Intrusion prevention

Eliminate Trojans and CNC bots with advanced inline intrusion prevention using Suricata and Proofpoint’s Emerging Threats Open rules. You can also choose the optional ET PRO (commercial subscription) or ET PRO Telemetry (sign up for free).