pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
Nozomi Networks - Nozomi Networks is one of the leading platforms in OT & IoT Security that allows organizations to monitor assets on their networks and identify threats, vulnerabilities to deal with them appropriately.
OPNsense - OPNsense® you next open source firewall. Free Download. High-end Security Made Easy™. Offers Intrusion Prevention, Captive Portal, Traffic Shaping and more.
Tenable-ot - Tenable-ot provides comprehensive OT security so that you can protect your IoT network against risks.
Emsisoft Online Armor Firewall - Emsisoft Online Armor Firewall is a freemium online firewall protection system by the Emsisoft that is based on the own independent protection technology of the Emsisoft.
Verimatrix Accelerate IoT Security - Verimatrix is a platform used by top businesses to Accelerate IoT Security across their network.