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




The best open source alternative to IPCop is OPNsense. If that doesn't suit you, our users have ranked more than 10 alternatives to IPCop and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to IPCop are pfSense, IPFire, Endian Firewall Community and OpenContrail.
OPNsense includes most of the features available in expensive commercial firewalls, and more in many cases. It brings the rich feature set of commercial offerings with the benefits of open and verifiable sources.




pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more.




IPFire is a server distribution with intended to use as a firewall. It focuses on flexibility, and scales from small to middle sized business networks and home networks.

Endian Firewall Community (EFW) is a "turn-key" linux security distribution that turns every system into a full featured security appliance with Unified Threat Management (UTM) functionality. The software has been designed with "usability in mind" and is very...



OpenContrail is an Apache 2.0-licensed project that is built using standards-based protocols and provides all the necessary components for network virtualization–SDN controller, virtual router, analytics engine, and published northbound APIs.
CacheGuard is a free open-source network security appliance for startups and growing businesses that need enterprise-grade protection without the complexity or the cost.

VyOS is a community fork of Vyatta , a Linux-based network operating system that provides software-based network routing, firewall, and VPN functionality.

Zeroshell is a Linux distribution for servers and embedded devices aimed at providing the main network services a LAN requires. It is available in the form of Live CD or Compact Flash image and you can configure and administer it using your web browser.



The SmoothWall Open Source Project was set up to develop and maintain SmoothWall Express - a Free firewall that includes its own security-hardened GNU/Linux operating system and an easy-to-use web interface.



BSD Router Project (BSDRP) is an embedded free and open source software router distribution based on FreeBSD with FRRouting (Quagga fork) and Bird.
It's really actively developed and additionally in a country not under direct control of the NSA or GCHQ respectively. As IPCop seems to be dead (no new version since some 2 years) IPFire has taken the best of IPCop and made it very much better.