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Welcome to OPNsense’s documentation!

OPNsense® is an open source, easy-to-use and easy-to-build FreeBSD based firewall and routing platform.

OPNsense includes most of the features available in expensive commercial firewalls, and more in many cases. It brings the rich feature set of commercial offerings with the benefits of open and verifiable sources.

Table of Contents

• About the Fork
  • Debunking the Myths
  • So why did we fork?
  • First Release
  • Future Development & Focus
• Introduction
  • Welcome to OPNsense’s documentation!
  • Mission Statement
  • Feature set
  • OPNsense Core Features
• User Manual
  • Hardware sizing & setup
  • Initial Installation & Configuration
  • Virtual & Cloud based Installation
  • The OPNsense User Interface
  • User Management
  • Using IPv6
  • Two-factor authentication
  • System Health & Round Robin Data
  • Netflow Export & Analyses
  • Using Aliases
  • Virtual Private Networking
  • Inline Intrusion Prevention System
  • Caching Proxy
  • Anti Virus Engine
  • Traffic Shaping
  • Multi WAN
  • Mobile Networking
  • High Availability & Hardware Failover
  • Captive portal & GuestNET
  • Dynamic Routing
  • How to’s
• Development Manual
  • Development Workflow
  • Coding Guidelines
  • Architecture
  • Backend
  • Frontend
  • Components
  • Examples
  • How to’s
  • Sources
• Project Relations
  • FreeBSD®
  • Deciso B.V.
  • HardenedBSD
  • M0n0wall
  • Open Source Initiative
• Legal notices
  • OPNsense License & Copyright
  • Packages and ports
  • Documentation Copyright
  • Trademark policy
• Support Options
  • Community
  • Commercial
• Contribute
  • Financially
  • Development
  • Translations
  • Documentation & wiki articles
  • Forum & IRC
  • Social media
  • Closing Words