OPNsense is an Open Source, easy-to-use, easy-to-build HardenedBSD-based firewall, and routing platform.

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

OPNsense started as a fork of pfSense and m0n0wall in 2014, with its first official release in January 2015. The project has evolved quickly while retaining familiar aspects of m0n0wall and pfSense. A strong focus on security and code quality drives the project's development.

OPNsense offers weekly security updates with small increments to react to new emerging threats within a fashionable time. A fixed release cycle of 2 major releases each year offers businesses the opportunity to plan upgrades. For each major release, a roadmap is put in place to guide development and set clear goals.

Four downloads are available. OPNsense is not for users new to Linux. You can browse our Linux Distros here.

DVD: ISO installer image with live system capabilities running in VGA mode. On amd64, UEFI boot is supported as well.
VGA: USB installer image with live system capabilities running in VGA mode as GPT boot. On amd64, UEFI boot is supported as well.
Serial: USB installer image with live system capabilities running in serial console (115200) mode as MBR boot.
Nano: a preinstalled serial image for USB sticks, SD, or CF cards as MBR boot. These images are 3G and automatically adapt to the installed media size after the first boot.

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