Why IT Security Practices Don't Transfer Directly to OT Environments
IT security's playbook — patch fast, reboot often, run agents everywhere — breaks down on a production line, where availability of the physical process outranks almost everything else.
A Different Set of Constraints
Standard IT security practice says patch promptly, reboot when needed, and run endpoint agents everywhere. On a production line, an unplanned reboot of a control system can halt a physical process mid-cycle, and a patch that hasn't been validated against the exact control firmware in use can introduce a fault far more disruptive than the vulnerability it fixed.
Availability Outranks Confidentiality
IT security's usual priority order — confidentiality, integrity, availability — inverts in most OT environments. A control system that's perfectly locked down but goes offline mid-process has failed at its actual job. Security measures for cyber-physical systems have to be designed around keeping the physical process running safely, not just keeping data private.
Segmentation Matters More Than Endpoint Coverage
Many OT devices can't run a modern endpoint agent at all — some are running decades-old embedded firmware with no vendor support left. Network segmentation, monitoring at the boundary, and tightly controlled data-diode-style flows between IT and OT layers do far more real work than trying to force IT tooling onto hardware it was never built for.
Hardening Both Layers Together
We treat the digital and physical layers as one security posture, not two separate projects — because an attacker doesn't care which side of that line they came in through, and neither should your defense.
