OPNsense review
A free, extensible firewall with VPN, IPS, high availability, and centralized management.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
OPNsense is an open-source, FreeBSD-based firewall and routing platform for individuals, businesses, and network administrators. Its capabilities cover stateful IPv4 and IPv6 firewalling, IPsec and OpenVPN, site-to-site VPN connectivity, traffic shaping, intrusion detection and prevention, monitoring, packet capture, NetFlow, and high availability. It is suited to organizations that want a free, extensible network security platform with web, API, and self-hosted access.
The Community Edition is available at no cost. The published plans show Business Edition and Business Edition 3Yr, with both adding a commercial firmware repository, an official OPNsense OVA image, selected professional plugins, and an integrated GeoIP database. The listed starting price is 149. OPNsense does not tie a product-wide firewall-throughput or concurrent-connection limit to its cheapest paid software plan; performance depends on the deployment hardware and configuration. This makes hardware planning an important part of evaluating the platform.
Its strongest advantage is breadth: multi-WAN load balancing and failover, Suricata-based intrusion detection and prevention, configuration and state synchronization, reporting, monitoring, APIs, plugins, and centralized firewall management through OPNcentral are included across a wide network-security scope. The trade-off is that this breadth may be more than a small environment needs, particularly when the priority is a simpler firewall with less infrastructure to configure. Organizations seeking control, extensibility, VPN connectivity, and advanced network operations should consider OPNsense. Those wanting a narrowly focused, low-administration firewall may prefer a more limited alternative.
OPNsense pros and cons
- Where it wins
- Free open-source edition with stateful IPv4 and IPv6 firewalling
- Includes VPN, IPS, multi-WAN, high availability, and reporting
- Plugins, APIs, and OPNcentral extend deployment and management options
- Where it doesn't
- Self-hosted deployment requires suitable hardware and configuration
- Business Edition adds commercial features at a paid starting price
- Broad networking scope may exceed the needs of simpler firewall setups
OPNsense fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update