OT REMOTE ACCESS
Industrial Remote Access Security Procurement Guide
Evaluate remote-access solutions for industrial systems using identity, least privilege, session control, logging, segmentation, support workflow and incident-recovery requirements.
Define the access model
- List internal engineering, OEM/vendor and emergency-support use cases separately.
- Require named identities, MFA where appropriate, role-based access and bounded access windows rather than shared permanent credentials.
- Define which assets and protocols can be reached from each access path.
Operational controls
- Require auditable session logs and a practical process to revoke access when work is complete.
- Place remote access within the intended OT network segmentation instead of bridging users broadly into control networks.
- Document backup access and local recovery when the remote-access service is unavailable.
Supplier evaluation
- Assess update policy, vulnerability handling, support lifecycle and administrative separation.
- Validate the workflow with the actual engineering tools and vendor support use cases.
- Include onboarding/offboarding and incident-response ownership in the acceptance criteria.
Professional references
These references establish the standards, technical framework or authoritative engineering context used for this page. Vendor commercial terms are not used as engineering evidence.
- NIST Cybersecurity Framework — NIST risk-management framework for cybersecurity governance and controls.
- ISA-95 / IEC 62264 Enterprise-Control System Integration — Reference architecture for manufacturing operations and enterprise-control integration.
- NIST SP 800-218 Secure Software Development Framework — NIST secure software development practices for supplier and lifecycle evaluation.
Engineering-use note. This PROFENG resource is for screening, comparison and technical preparation. Replace assumptions with project data and use the responsible qualified professional, applicable standards, codes and authority requirements for final design, compliance or safety decisions.
Commercial independence
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