This skill covers implementing secure remote access to OT/ICS environments for operators, engineers, and vendors while preventing unauthorized access that could compromise industrial operations. It addresses jump server architecture, multi-factor authentication, session recording, privileged access management, vendor remote access controls, and compliance with IEC 62443 and NERC CIP-005 remote access requirements.
Do not use for securing IT-only remote access without OT components, for configuring VPN for corporate workers (see general VPN guides), or for physical access control to OT facilities.
Implement a defense-in-depth remote access architecture with an intermediate system in the DMZ that prevents any direct network connectivity between external users and OT systems.
# OT Remote Access Architecture
# Key principle: NO direct connection from external networks to OT systems