Press Release


For more information on OPNsense software, see project website:

Middelharnis., 2023 –
January 26th, The Netherlands

Deciso® is proud to announce the latest major version of OPNsense®, a leading open-source firewall and routing platform. OPNsense 23.1 called “Quintessential Quail” includes a host of exciting new features and improvements.

This version includes a DNS blocklist implementation that supports large lists and provides an easy way to block ads and malicious content. It is accompanied by the DNS insight dashboard, giving users a comprehensive view of their DNS traffic and activity.

At the same time support for firewall BGP ASN alias types is added, providing users with enhanced control over their network traffic.

And, to further enhance the platform’s capabilities, several core components have been migrated to the MVC framework, effectively adding API support. This includes packet capturing and IPsec, making it easier for users to integrate OPNsense into their existing infrastructure.

These enhancements make OPNsense even more powerful and user-friendly, providing users with greater flexibility and control over their network security.

We are excited to share this new release with our community. Securing networks and blocking ads has never been this easy. We stay committed to provide the best open-source firewall and routing platform on the market – says Ad Schellevis, OPNsense lead developer.

OPNsense is the fastestest growing open-source security platform with an Open Source Initiative (OSI) approved 2-clause or simplified BSD license. Its feature set is extensive and ranges from router/firewall to inline intrusion detection and prevention.

It is the only open-source product that comes with the highly valued Proofpoint® ET Pro ruleset at no cost in the form of the ET Pro Telemetry edition.

The project is defined by its innovation through modularizing and hardening, simple and reliable firmware upgrades, multi-language support, hardened security, fast adoption of upstream software updates as well as a large and friendly community.

As with every release, the latest security patches have been applied and the latest component versions have been included. The mission to make OPNsense the most widely used open-source security platform is well on its way.

Deciso is the company that founded the OPNsense project and offers turnkey solutions as well as commercial support and services.

About Deciso
Deciso B.V. ( is a globally operating manufacturer of networking equipment. The company designs and produces complete products for integrators, OEMs and resellers. Deciso believes in the power of open source and actively contributes to the open source community. The company was founded in 2000 and is located in Middelharnis, the Netherlands