Topic starter
24/06/2026 11:25 pm
TL;DR: Flat industrial networks, shared VPNs, and lingering credentials let one maintenance session expose multiple PLCs, control servers, and downstream systems, according to Corsha. Identity-based microsegmentation shifts segmentation from network redesign to session-level access control, which is the practical path when uptime constraints make rip-and-replace unrealistic.
Editorial analysis by NHI Mgmt Group, based on content published by Corsha: “title”.
Key questions
Q: How should security teams reduce lateral movement risk in enterprise networks?
A: Start by reducing the number of internal trust paths an identity can cross.
Q: Why do shared VPNs and jump boxes increase lateral movement risk in OT networks?
A: They concentrate trust into a small number of reusable paths, so one approved login can reach far more assets than intended.
Q: What are the signs that OT segmentation is failing in practice?
A: Look for maintenance paths that can reach more than one zone, credentials that remain usable after the job ends, and limited visibility into what the session actually touched.
Practitioner guidance
- Map lateral paths from shared remote access Inventory the VPNs, jump boxes, and shared logins that can reach multiple PLCs, control servers, or downstream systems from one session.
- Bind access to unique machine and user identities Replace broad, reusable access with unique identities that are verified before a session opens and scoped to the specific systems, functions, or zones needed for the task.
- Apply just-in-time session expiration Set remote access to expire automatically when the maintenance task ends, so credentials do not remain available for repeat use or reuse in later sessions.
Bottom line: Industrial environments often expose too much lateral reach because access paths are shared, legacy, and designed for uptime rather than isolation.
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This topic was modified 1 day ago by NHI Mgmt Group
25/06/2026 8:16 am
Identity is becoming the practical segmentation boundary in industrial operations. The article shows that network boundaries are often too rigid to redesign and too weak to trust, which pushes control into the session itself. That is not a cosmetic change, because the access decision now has to carry the segmentation burden. Practitioners should treat identity enforcement as the real containment layer for OT lateral risk.
A question worth separating out:
Q: When should industrial teams choose identity-based segmentation over network redesign?
A: Choose it when uptime constraints, legacy systems, or production risk make VLAN rebuilds, firewall rework, or topology changes unrealistic. Identity-based segmentation is the better fit when the control objective is to reduce lateral reach without interrupting operations.
👉 Read our full editorial: Identity-first microsegmentation for industrial network lateral risk
This post was modified 1 day ago by NHI Mgmt Group