Vendor Sheet
Securing Open Platform Communications in OT Environments with FortiGate Next-generation Firewalls
FortiGate NGFWs secure Open Platform Communications used in manufacturing, utilities, energy, and building automation. They understand OPC Classic and OPC UA, control more than 250 OPC functions, and recognize over 30 OT/ICS protocols. OPC Classic relies on DCOM and MS RPC, which dynamically allocate ports that conventional firewalls may broadly expose. FortiOS session helpers inspect packet bodies, open only the ports needed for an approved server-client session, and restrict unnecessary paths. Application control verifies genuine OPC traffic and can enforce commands precisely—for example, allowing a pump to start or stop while blocking speed changes. IPS detects malicious content inside OPC streams. Security Fabric integration extends visibility, control, intelligence, and automated resp
