What it means
OT remote access governance limits who can connect, from what managed path, for what approved purpose, to which assets, for how long, and under what monitoring and response controls.
Why it matters
Persistent, shared, internet-exposed, or vendor-controlled access can bypass segmentation and become a direct path to physical process impact.
Practical focus
- Require named identity, strong authentication, approved device, least privilege, time-bound authorization, controlled entry point, and explicit target scope.
- Use session recording or equivalent oversight, command and file controls, owner approval, emergency revocation, and access review.
- Disable dormant paths, remove direct public exposure, test fail-closed behavior, and validate vendor offboarding.
- Preserve this evidence: Retain access requests, approvals, identity and device evidence, session logs, recordings, file transfers, exceptions, reviews, and revocation tests.
- Exercise this failure scenario: A vendor account remains continuously enabled and later provides unmonitored access to multiple sites after credentials are compromised.
Common mistakes
- Using the label OT Remote Access Governance without defining scope, ownership, decision authority, and the exact data, systems, people, or process affected.
- Treating a policy, contract, diagram, dashboard, or tool demonstration as proof that OT Remote Access Governance operates consistently in production.
- Closing work without retaining the evidence needed to reconstruct the decision and verify the intended control outcome.
- Testing only the normal path and never rehearsing the failure condition: A vendor account remains continuously enabled and later provides unmonitored access to multiple sites after credentials are compromised.
Certification relevance
This subject appears in or supports the following certification bodies of knowledge: