Topic starter
07/06/2026 8:19 pm
TL;DR: Industrial secure remote access is shifting from a connectivity layer to an identity control point as Zero Trust, third-party access, session recording, and microsegmentation become baseline requirements in OT and ICS environments, according to SSH Communications Security and KuppingerCole. The governance gap is no longer tunnel security but whether access can be contextual, monitored, and revoked before operational risk spreads.
Editorial analysis by NHI Mgmt Group, based on content published by SSH Communications Security: “Secure Remote Access for OT and ICS: Insights from the Experts”.
Key questions
Q: What breaks when OT remote access is still treated as a connectivity problem?
A: When industrial remote access is treated as simple connectivity, teams lose the ability to enforce identity context, monitor session behaviour, and contain lateral movement.
Q: Why does remote access create so much operational risk in OT and ICS environments?
A: Remote access becomes risky because industrial environments combine legacy systems, third-party support, and availability pressure in the same access path.
Q: How do you know whether OT session monitoring is actually working?
A: Session monitoring is working when teams can see meaningful user and command activity, intervene during an active session, and produce usable audit evidence after the fact.
Practitioner guidance
- Define OT remote access as an identity control domain Assign ownership for industrial remote access to IAM and security teams together, with explicit policy for who can reach which assets, under what conditions, and with what approval path.
- Enforce contextual access checks for every industrial session Require authentication decisions to consider operator role, device trust, asset criticality, and current operating conditions before access is granted or expanded.
- Record and supervise privileged OT sessions Capture command-level session activity and ensure operations teams can interrupt or revoke sessions in real time when behaviour deviates from expected maintenance activity.
Bottom line: OT and ICS remote access is becoming an identity governance problem because visibility, session control, and revocation now determine whether industrial access stays safe.
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This topic was modified 4 days ago by NHI Mgmt Group
07/06/2026 10:10 pm
Identity-first control is now the right mental model for OT and ICS remote access. The article shows that the old framing of secure remote access as a transport problem no longer fits industrial operations. Once third-party access, legacy systems, and machine-to-machine activity converge, the control point becomes identity, not connectivity. Practitioners should read this as a governance shift, not a tooling preference.
A few things that frame the scale:
- 90% of IT leaders say properly managing NHIs is essential for a successful zero-trust implementation, according to the Ultimate Guide to NHIs.
A question worth separating out:
Q: Who should own secure remote access governance for industrial systems?
A: Ownership should sit with IAM, PAM, and industrial security stakeholders together, because the control spans identity policy, operational uptime, vendor access, and segmentation. OT remote access is not just a network team issue or a plant-floor issue. It needs explicit accountability for access approval, session oversight, and revocation authority.
👉 Read our full editorial: Secure remote access for OT and ICS needs identity-first control
This post was modified 4 days ago by NHI Mgmt Group