1. OT Server Roles Explained — Every Component at Every Level of the Purdue Model

What servers actually keep an industrial network running — and where do they sit?

In this first video of the OT Security Series, we break down every major server type found in an Operational Technology (OT) environment and map each one to its level in the Purdue Reference Model. By the end you'll know what lives at Level 0 through Level 4, why each server exists, and how they communicate across zones.

What's covered:
▸ What the Purdue Model is and why it still matters
▸ Historian servers, Engineering Workstations, SCADA, HMI and DCS
▸ How IT servers (AD, DNS, SIEM, PAM) appear at Level 4
▸ The boundary technologies between zones (Jump Server, Data Diode, DMZ)
▸ Why each level is isolated — and what happens when it isn't

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SERIES ROADMAP — coming next:
Episode 2 → Historian Server deep dive (OSIsoft PI / Ignition)
Episode 3 → SCADA & HMI — how operators see the plant
Episode 4 → Jump Server & Bastion Host — securing admin access
Episode 5 → Data Diode — one-way enforcement explained
Episode 6 → OT vs IT security — why the same rules don't apply
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If you work in industrial automation, OT security, critical infrastructure, or are studying for certifications like ICS/SCADA security, GICSP, or CSSA — this series is built for you.

Like and subscribe to get notified when Episode 2 drops.

Видео 1. OT Server Roles Explained — Every Component at Every Level of the Purdue Model канала Dr Manish Kumar Rai