IEC 62443 Archives - Ryan Thomas Huff

Abstract illustration of stacked network layers, like Purdue model levels, with glowing device nodes and a highlighted DMZ layer that controls the few connections between them

October 27, 2026

IT/OT Network Segmentation: The Purdue Model Is the Map, IEC 62443 Zones and Conduits Are the Rules

Purdue tells you where things live. IEC 62443 zones and conduits tell you who's allowed to talk.[…]