Chapter 9

Establishing Zones and Conduits

Abstract

Zones and conduits are a fundamental concept of industrial network cyber security. By grouping similar devices or systems into “zones” according to security levels, and controlling communications between zones, a strong foundation of security will be realized. But how do you know what belongs in what zone?

Keywords

Zone
Conduit
ISA-99
ISA-62443
IEC-62443
Security Levels
Information in this chapter
Security Zones and Conduits Explained
Identifying and Classifying Security Zones and Conduits
Recommended Security Zone Separation
Establishing Security Zones and Conduits
The concepts of Defense in Depth, as discussed up to this point, have focused on the separation of devices, communication ...

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