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OpnSense Logo.png
ScreenShot OPNSense.png
DeveloperDeciso B.V.
OS familyFreeBSD (12.1-RELEASE)
Working stateCurrent
Source modelOpen source
Initial release2 January 2015; 5 years ago (2015-01-02) as a fork of pfSense
Latest release20.7 ("Legendary Lion") / July 30, 2020; 2 months ago (2020-07-30)[1]
Repository Edit this at Wikidata
Platformsi386, x86-64
Kernel typeMonolithic kernel
Influenced byM0n0wall
LicenseSimplified BSD / FreeBSD License[2]
Preceded bypfSense
Official websiteopnsense.org
Support status
Community & Commercial

OPNsense is open source, FreeBSD-based firewall and routing software developed by Deciso, a company in the Netherlands that makes hardware and sells support packages for OPNsense. It is a fork of pfSense, which in turn was forked from m0n0wall, which was built on FreeBSD.[3] It was launched in January 2015.[2] When m0n0wall closed down in February 2015 its creator, Manuel Kasper, referred its developer community to OPNsense.[4] OPNsense has a web-based interface and can be used on i386 and x86-64 platforms.[5] Along with acting as a firewall, it has traffic shaping, load balancing, and virtual private network capabilities, and others can be added via plugins.[6]

In November 2017, a World Intellectual Property Organization panel found that the domain opnsense.com was used to discredit OPNsense.[7]

See also[edit]

Further reading[edit]

  • Upadhyay, Rajneesh (September 30, 2015). "How To Install OPNsense Firewall". Unixmen.
  • Sensei Blog (November 07, 2019) "How to install OPNsense". Matt.
  • Stubbig, Markus (2019). Practical OPNsense. Books on Demand. ISBN 978-3-748-10723-1.


  1. ^ "OPNsense 20.7 released". Opnsense.org. Retrieved 2020-08-02.
  2. ^ a b "Press release: Deciso Launches OPNsense, a New Open Source Firewall Initiative". Deciso via PRNewsWire. January 2, 2015.
  3. ^ Serdar Yegulalp. "Review: 6 slick open source routers". cio.com. Archived from the original on 20 December 2017. Retrieved 20 December 2017.
  4. ^ Richard Chirgwin (16 Feb 2015). "MOnOwall comes tumbling down". The Register. Wayback Machine. Archived from the original on 12 May 2019. Retrieved 12 May 2019.
  5. ^ "DistroWatch.com: OPNsense". DistroWatch. November 21, 2017.
  6. ^ Sharma, Mayank; Drake, Nate (September 26, 2017). "What's the best Linux firewall distro?". Linux Format via TechRadar.
  7. ^ "WIPO Domain Name Decision: D2017-1828". WIPO. November 12, 2017.

External links[edit]