ICS/SCADA Cybersecurity — Lesson 2: Threats, Vulnerabilities, Remote Access, Segmentation, and Secure Design

Learning Objectives

• Explain the structures, services, data, settings, roles, and dependencies governing Ot Threat Scenarios and Legacy Vulnerabilities.
• Implement and validate Remote Access, Network Segmentation, and Secure Architecture and Change Control using reviewable evidence.
• Evaluate the condition where a control passes a basic check but fails during Network Segmentation because Remote Access data, version, or dependency assumptions differ and select a proportionate corrective response.

Detailed Topics

• Ot Threat Scenarios applied to the course scenario, expected behavior, dependencies, controls, and evidence.
• Legacy Vulnerabilities applied to the course scenario, expected behavior, dependencies, controls, and evidence.
• Remote Access applied to the course scenario, expected behavior, dependencies, controls, and evidence.
• Network Segmentation applied to the course scenario, expected behavior, dependencies, controls, and evidence.
• Secure Architecture and Change Control applied to the course scenario, expected behavior, dependencies, controls, and evidence.

Instructor Demonstration

The instructor traces an operational-technology team must reduce cyber risk while preserving process safety, availability, engineering integrity, and recovery capability. The walkthrough connects tools, configuration or analysis logic, system messages, decisions, and evidence captured in the OT asset and trust-zone map, monitoring plan, incident playbook, and resilience improvement portfolio. It also tests the exception where a control passes a basic check but fails during Network Segmentation because Remote Access data, version, or dependency assumptions differ.

Hands-On Exercise

Complete a controlled, authorized EC-Council exercise covering Threats, Vulnerabilities, Remote Access, Segmentation, and Secure Design and preserve the verified result in the OT asset and trust-zone map, monitoring plan, incident playbook, and resilience improvement portfolio.

1. Confirm scope, authorization, prerequisites, versions, identities, dependencies, and acceptance criteria.
2. Execute the workflow while recording settings, outputs, events, decisions, and system messages.
3. Test normal behavior, one boundary condition, and the stated exception without targeting real third-party systems.
4. Document corrections, evidence, ownership, retest criteria, rollback or recovery, and handover actions.

Scenario Analysis

• Identify which object, service, policy, setting, or sequence most strongly influences Ot Threat Scenarios.
• Compare two defensible responses and explain technical, security, operational, legal, and support trade-offs.
• Determine how the OT asset and trust-zone map, monitoring plan, incident playbook, and resilience improvement portfolio should be approved, retained, retested, and updated.

Troubleshooting Guidance

Start where expected behavior first differs from the observed result. Check authorization, prerequisites, identity, configuration order, data quality, version compatibility, connectivity, status, resource limits, and evidence separately. Treat “a control passes a basic check but fails during Network Segmentation because Remote Access data, version, or dependency assumptions differ” as a hypothesis until logs, settings, captured outputs, and retest outcomes confirm the cause.

Validation Checklist

• Required components, identities, permissions, settings, safety controls, and dependencies are present.
• The OT asset and trust-zone map, monitoring plan, incident playbook, and resilience improvement portfolio connects each conclusion to objective, reviewable evidence.
• Normal processing, a boundary condition, dependency behavior, and the stated exception were tested.
• Corrections, ownership, retest criteria, rollback or recovery, documentation, and operational handover are complete.

Lesson Outcome

Learners can apply Threats, Vulnerabilities, Remote Access, Segmentation, and Secure Design, explain the resulting security or operational behavior, and defend the outcome through the OT asset and trust-zone map, monitoring plan, incident playbook, and resilience improvement portfolio.