Industrial Protocols & Communications for ICS Cybersecurity

Master Modbus, DNP3, OPC UA, and Critical SCADA Protocols to Secure Industrial Control Systems and Pass the GICSP Exam

What you’ll learn
✓ Analyse Modbus RTU and TCP frame structures to identify security vulnerabilities and implement appropriate defences in industrial environments
✓ Configure and secure DNP3 communications including Secure Authentication for SCADA and utility applications
✓ Evaluate OPC DA legacy risks and implement OPC UA security features including certificates and encryption
✓ Apply TCP/IP networking fundamentals including subnetting and segmentation strategies specific to OT environments
✓ Assess industrial Ethernet protocols (EtherNet/IP, PROFINET, BACnet, IEC 61850) for security weaknesses and attack vectors
✓ Implement cryptographic controls including TLS, hashing, and certificate management to protect industrial communications

Requirements
● Basic understanding of networking concepts (IP addresses, ports, TCP/UDP) – we’ll build on these foundations
● Familiarity with industrial control systems or SCADA environments is helpful but not essential
● No programming or coding experience required
● Access to a computer for following along with protocol analysis examples (Wireshark recommended but not mandatory)

Description
This course contains the use of artificial intelligence.

Industrial control systems are under siege. Every day, threat actors probe SCADA networks, exploit unprotected Modbus registers, and leverage legacy protocol weaknesses to compromise critical infrastructure. The difference between a secure facility and a catastrophic breach often comes down to one factor: whether the engineers responsible truly understand how industrial protocols work—and where they fail.

This comprehensive course delivers the protocol mastery you need to defend operational technology environments and pass the GICSP certification exam with confidence.

You’ll start with the networking foundations that underpin all industrial communications—TCP/IP implementation in OT environments, subnetting strategies for network segmentation, and the critical differences between IT and ICS network architectures. From there, you’ll dive deep into the protocols that power the world’s most critical systems.

What You’ll Master

Modbus RTU and TCP—the workhorse protocols running countless industrial processes—including frame structure, function codes, register addressing, and why the complete absence of authentication creates exploitable vulnerabilities attackers actively target.

DNP3 with Secure Authentication, the protocol backbone of electric utilities and water systems, including its layered architecture and the security mechanisms that distinguish it from legacy alternatives.

OPC technologies from legacy DA implementations plagued by DCOM vulnerabilities through to modern OPC UA with its built-in security model and certificate-based authentication.

Real-time industrial Ethernet protocols including EtherNet/IP with CIP messaging, PROFINET, and PROFIBUS—the protocols automating manufacturing and process industries globally.

Specialised protocols including BACnet for building automation security, IEC 61850 for substation protection systems with GOOSE messaging, and the cryptographic fundamentals essential for implementing TLS and certificate management in OT environments.

Who this course is for
■ Control systems engineers and technicians looking to understand cybersecurity risks in their OT environments
■ IT security professionals transitioning into industrial cybersecurity or OT security roles
■ GICSP exam candidates who need comprehensive protocol knowledge for certification success
■ SCADA engineers and operators responsible for securing critical infrastructure communications
■ ICS security consultants and auditors assessing industrial network vulnerabilities
■ Engineering graduates and career changers pursuing roles in industrial cybersecurity

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