OPNsense is an open source, FreeBSD-based firewall implementation created in 2015 as a fork of pfSense. It is actively maintained by  Deciso B.V. in the Netherlands, which not only maintains the software, but also makes hardware and sells commercial support for the software.

Additional resources:

  • The OPNsense homepage, where you can read all about it.
  • The OPNsense article on Wikipedia.
Slug
opnsense
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