thinQmaster Virtual testing partner Adaptive practice exams that find your weak spots and drill them. Every answer explained. From $69
Enroll

thinQmaster

Find your exam

Five questions free, before you decide.

Step 1 · choose a vendor

In one of our camps? Your practice exams come with the tuition — they are on your study page already.

Application & OT Security · Intermediate

Secure Remote Access for OT

Controlled, monitored remote connectivity for vendors and engineers into industrial environments.

Definition

Best practices include brokering access through an industrial DMZ jump host, MFA, just-in-time and time-limited access approval, session recording, least privilege to specific assets and no direct internet-exposed HMIs or VPNs terminating in control networks.

Example

A vendor's support session is approved for two hours, routed through the IDMZ jump server and recorded.

Exam tip

Remote access into OT terminates in the IDMZ, never directly on control networks.

Related terms