6 open-source Network & Firewall Management vendors.

Open-source software for Network & Firewall Management that you can self-host, with auditable source code — regardless of the developer's headquarters.

• Deciso OPNsenseSelf-hosted / open source

  Dutch; open source firewall and routing platform (OPNsense), with commercial appliances and support.

  Netherlands

• Endian UTMSelf-hosted / open source

  Italian; Unified Threat Management firewalls with open source origins (Endian Firewall).

  Italy

• HAProxySelf-hosted / open source

  Open-source load balancer and reverse proxy (GPL-2/LGPL); commercial editions and support by HAProxy Technologies (Waltham, MA, French origin). Self-hostable.

  United States

• IPFireSelf-hosted / open source

  German; open source Linux firewall, developed with commercial support from Lightning Wire Labs.

  Germany

• Open vSwitchSelf-hosted / open source

  Open-source multilayer virtual switch for software-defined networking, maintained as a Linux Foundation project; self-hosted and actively maintained (latest release 3.5.2, November 2025).

  United States

• SKUDONETSelf-hosted / open source

  Spanish; open source and commercial load balancer / application delivery controller (formerly Zevenet).

  Spain