Open-Source Firewalls
Open-source firewalls provide network security through packet filtering, stateful inspection, and intrusion prevention using community-developed software on standard or dedicated hardware. OPNsense and pfSense are the dominant platforms. Differentiation comes from management interface quality, plugin ecosystem, VPN integration, and community support responsiveness.
🇨🇿
CZ.NIC
Prague
From quote
Open-Source
Router
Firewall
Hardware
🇫🇷
CrowdSec
Paris
Free (self-hosted)
Free
Open-Source
IPS
Collaborative Security
GDPR
🇳🇱
Deciso (OPNsense)
Middelharnis
€0.00/mo
Free
GDPR
Open-Source
BSD-based
🇮🇹
Endian
Bolzano
Free (Community)
Free
Open-Source
UTM
Firewall
Gateway
🇩🇪
Greenbone
Osnabrück
Free (self-hosted)
Free
Open-Source
Vulnerability Scanning
Network Security
GDPR
🇩🇪
IPFire
Berlin
Free (self-hosted)
Free
Open-Source
Firewall
IDS/IPS
Linux
🇮🇹
NethServer
Pesaro
Free (self-hosted)
Free
Open-Source
UTM
Firewall
Linux
🇦🇹
Proxmox
Vienna
€0.00/mo
Free
GDPR
Open-Source
Integrated Firewall
🇬🇧
Smoothwall
Leeds
From quote
Firewall
Web Filtering
Education
UK
🇳🇱
Suricata
Amsterdam
Free (self-hosted)
Free
Open-Source
IDS/IPS
Network Security
GDPR
🇪🇸
VyOS Networks
Free (self-hosted)
Free
Open-Source
Router
Firewall
Network OS
🇮🇹
Zeroshell
Free (self-hosted)
Free
Open-Source
Firewall
Router
Linux