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Open Source Security

OPNsense - The Open Source Firewall

Professional network security with OPNsense. Consulting, installation and management.

What is OPNsense?

OPNsense is a powerful open source firewall and routing platform based on FreeBSD. As a fork of pfSense and m0n0wall, OPNsense combines state-of-the-art security features with an intuitive web interface and regular updates.

Thanks to its active community and weekly security updates, OPNsense is one of the most reliable firewall solutions for businesses of all sizes.

Weekly security updates
Two-factor authentication (TOTP, FIDO2)
Modern and intuitive web interface
Based on FreeBSD with HardenedBSD security features
Integrated Intrusion Detection System (Suricata)
Extensive plugin library
REST API for automation
Active community and professional support
OPNsense Dashboard - Lobby with system status and traffic graphs OPNsense Reporting - Traffic analysis and monitoring

DATAZONE -- Your Partner for Network Security

We plan, implement and manage your OPNsense firewall. From initial configuration through VPN setups to cluster environments -- you benefit from technical expertise, stable solutions and direct support.

Secure your network with OPNsense.

Integration

Seamless integration into existing enterprise environments

Configuration & Hardening

Professional setup with security best practices

VPN Solutions

OpenVPN, IPSec and WireGuard for secure site-to-site connectivity

Updates & Monitoring

Regular updates and proactive monitoring

High Availability

HA setups with CARP failover for maximum uptime

Comparison: OPNsense vs. Commercial Firewalls

A direct comparison shows: OPNsense offers the same feature set as commercial firewalls -- but at significantly lower cost and with greater flexibility in customisation and integration.

Feature OPNsense (Open Source) Commercial Firewall
Licence Costs None Licence and maintenance fees
Source Code Open, auditable Closed ("black box")
Extensibility Plugins, API, custom modules Limited
Security Regular community updates Vendor-dependent
High Availability (Cluster) Built-in Often requires additional licence
Central Management With OPNcentral Proprietary or paid
VPN Support OpenVPN, WireGuard, IPsec Vendor-dependent
Support Options Community / Business Edition Vendor or partner network

Technical Overview of OPNsense Features

The platform covers all key areas of modern network security. Its modular architecture allows it to be perfectly tailored to your business requirements.

Category Features / Description
Network Protection Stateful Firewall, IDS/IPS, GeoIP Blocking
Connectivity VPN (OpenVPN, IPsec, WireGuard), Multi-WAN, Failover
Management WebGUI, REST API, CLI, OPNcentral
Monitoring Real-time dashboard, reporting, NetFlow export
High Availability CARP Failover, Configuration Sync, State Synchronisation
Traffic Shaping Quality of Service, bandwidth management, prioritisation
DNS & DHCP DNS Resolver (Unbound), DHCP Server, Dynamic DNS
Web Proxy Caching Proxy, URL filter, ICAP integration
Authentication LDAP, RADIUS, TOTP, FIDO2, voucher system

OPNsense Features at a Glance

Comprehensive security features for your enterprise network.

VPN & Remote Access

Secure site-to-site connectivity and remote access with OpenVPN, IPSec and WireGuard. Site-to-site and road warrior configurations.

Intrusion Detection

Suricata IDS/IPS detects and blocks attacks in real time. Automatic rule updates protect against the latest threats.

Traffic Shaping

Quality of Service and bandwidth management for prioritised data traffic. Guaranteed bandwidth for business-critical applications.

Two-Factor Authentication

Additional security through TOTP and FIDO2. Protect access to your firewall with modern authentication methods.

High Availability

CARP failover cluster for maximum uptime. Automatic switchover during hardware or software failures.

Central Management

Intuitive web GUI, powerful REST API and comprehensive reporting features for central management of your firewall.

Frequently Asked Questions about OPNsense

Answers to the most important questions about OPNsense and our firewall services.

How much does OPNsense cost?
OPNsense is completely free as open source software. Costs only arise for hardware and optionally for professional installation, configuration and support from a partner like DATAZONE.
Is OPNsense better than pfSense?
OPNsense offers more frequent updates, a more modern interface, better plugin support and is based on HardenedBSD for enhanced security. Many companies are switching from pfSense to OPNsense due to its more active development and better community support.
Can OPNsense replace a commercial firewall?
Yes, OPNsense offers comparable features to Sophos, Fortinet or Cisco ASA -- including VPN, IDS/IPS, traffic shaping and high availability. There are no licence costs and the source code is fully auditable.
Does OPNsense support VPN connections?
OPNsense supports OpenVPN, IPSec and WireGuard for secure VPN connections. Both site-to-site connections for multi-site networking and road warrior configurations for remote workers are possible.
Does DATAZONE offer OPNsense support?
Yes, as an experienced OPNsense partner, we offer professional support: from initial installation through regular updates to 24/7 emergency support. We manage OPNsense installations across Germany.
How secure is OPNsense?
OPNsense is based on HardenedBSD and receives weekly security updates. The integrated Suricata IDS/IPS detects attacks in real time. Thanks to the open source code, security can be independently verified.

Related Topics

Comparison

OPNsense vs. pfSense

Detailed comparison of both open source firewalls -- features, security and support.

Network Engineering

Network planning, segmentation and site-to-site connectivity -- the perfect complement to your OPNsense firewall.

VPN Solutions

Secure site-to-site connectivity and remote access with OpenVPN, IPSec and WireGuard.

Server Monitoring

Proactive monitoring of your firewall and network infrastructure with Icinga.

OPNsense for your business?

Get in touch for a no-obligation consultation. We plan and implement your tailored firewall solution.

Get in touch