Before you can secure your OT network, you have to understand it.

In this episode of the Zeroed-In Podcast, our host Olivier Bloch sits down with Dan Frechette, OT security expert and former member of the CyberX Labs team (now Microsoft Defender for IoT).

Together, they unpack the fundamentals of OT visibility, asset discovery, and passive network monitoring. They also cover how modern tools like Microsoft Defender for IoT help organizations identify risks before attackers exploit them.

Topics Include:

• Why you can’t secure what you don’t know exists

• The critical differences between IT and OT networks

• Real-world OT cyberattacks like TRITON

• How to passively discover every device in your plant network

• Why security may actually bridge IT and OT, not divide themIf you work in manufacturing, utilities, or industrial cybersecurity... this is your crash course in understanding what’s really running on your network, and how to defend it.Subscribe for more conversations on Industrial IoT, OT Security, and AI in Manufacturing.

⏱ Chapters00:00 Intro: Understanding OT Infrastructure01:42 Dan Frechette’s Background in OT Security03:30 Why You Can’t Secure What You Don’t Know06:15 The Old “Air Gap” Myth and Why It’s Failing09:10 IT vs OT: The Two Worlds Explained13:25 Real OT Attack Stories (TRITON, Oldsmar, etc.)18:20 How to Map Your OT Network Passively22:10 Monitoring and Detecting Anomalies27:15 Defender for IoT: Setup and First Results31:40 Bridging the IT/OT Divide with Security36:00 Final Takeaways

🎧 Brought to you by Thing-Zero: Secure. Predict. Augment. Automate.

📌 Follow Olivier Bloch on LinkedIn - https://www.linkedin.com/in/marvin-tansley-a914551/

📌 Follow Dan Frechette on LinkedIn - https://www.linkedin.com/in/dan-frechette/

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#IoT #OT #MicrosoftSecurity #DefenderForIoT #manufacturing