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OPNsense project preview
SecurityAlternative to pfSenseAlternative to Sophos FirewallAlternative to FortiGate

OPNsense

Open source FreeBSD-based firewall and routing platform with enterprise features.

View on GitHub Visit website
LicenseBSD-2-Clause
GitHub stars4.5k
Last commit1 weeks ago
Tags6 topics
Suricata IpsFreebsd RouterDevopsWireguard GatewaySecurityUtm Firewall
Overview

Why consider OPNsense?

OPNsense is an open-source, hardened FreeBSD-based firewall and routing platform developed by Deciso. It provides stateful packet filtering, multi-WAN load balancing, Suricata intrusion prevention (IPS), WireGuard / IPsec VPNs, NetFlow reporting, and two-factor authentication.

Guided learning

Learn OPNsense by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of OPNsense

OPNsense delivers Next-Gen Firewall (NGFW) threat protection with regular security update patches.

Installation

Install OPNsense ISO onto x86_64 server hardware and manage policies via modern Bootstrap web UI.

OPNsense is licensed under the 2-Clause BSD License.

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OPNsense FAQs

OPNsense is listed as a Security tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository and official website for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

OPNsense is listed under the BSD-2-Clause license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

OPNsense is listed as an alternative to pfSense. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.