Flow Ctrl Tech Engineering

The Purdue Model & Industrial DMZ (Level 3.5): Firewalls, Jump Boxes & OT Isolation

Master the ISA-95/Purdue enterprise hierarchy: deploying Level 3.5 Industrial DMZs, configuring FortiGate/Palo Alto OT firewalls, and eliminating dual-homed servers.

  • Direct communication between enterprise IT (Level 4) and machine controllers (Level 1/2) must be strictly forbidden.
  • The Industrial DMZ terminates all incoming connections; data is exchanged via jump boxes and proxy services.
  • Dual-homed servers bridging two network cards bypass all firewall inspection, creating open backdoors.

Flow Ctrl Tech Engineering: Turnkey industrial automation, PLC programming, SCADA development, HMI, fieldbuses, and IIoT architectures. Contact our engineering center at [email protected] or phone +91 91110 91005.