O

OPNsense

Open SourceBSD-2-Clause

Modern FreeBSD-based firewall with weekly updates

Difficulty
●●● Advanced
Last check
2026-08-10

Description

OPNsense is an open-source firewall and routing platform based on FreeBSD, created as a fork of pfSense. It features a modern user interface, weekly security updates, integrated intrusion detection with Suricata, and a REST API for automation. OPNsense is developed in the Netherlands and has a strong European community.

Preview

OPNsense Preview

Platforms

Linux

Replaces the following proprietary tools

Cisco ASAOPNsense
proprietary firewallsOPNsense

Self-Hosting

OPNsense can be self-hosted on your own infrastructure. Visit the official documentation for installation instructions.

Documentation →

Tags

#freebsd#europa#ids#suricata#rest-api

Similar Tools

P

pfSense CE

Powerful open-source firewall and router distribution

5.0k
Cisco ASAproprietary firewalls
Apache-2.0●●● Advanced
Mar 2026
C

CrowdSec

Collaborative open-source security through crowd intelligence

9.2k
Cisco ASAproprietary firewalls
MIT●● Medium
Aug 2026
F

Fail2ban

Automatic protection against brute-force attacks

12.0k
Cisco ASAproprietary firewalls
GPL-2.0● Easy
Aug 2026
← Back to Firewall & Network Security