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OT/ICS/IOT Security

Protecting critical infrastructure across the Purdue model - rail, aviation, SCADA and industrial control - aligned to IEC 62443, NIST SP 800-82, CLC/TS 50701 and DO-326A, and tested without disrupting live operations.

OT, ICS and IoT security
PROTECT
NIST Function · Protect

Protect industrial and connected environments where IT meets OT

At CyberSecOn, we understand the critical importance of securing your OT, ICS and IoT environments. With the growing convergence of IT and OT systems, it's essential to have robust security measures in place to protect your critical infrastructure from cyber threats. Our OT/ICS/IoT Security Services are designed to safeguard your industrial processes, control systems, and connected devices, ensuring the integrity, availability, and confidentiality of your operations.

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Backed by ISO/IEC 27001 · Certified CREST · Accredited NIST · CMMC · ISO 27001 · GDPR Australia · USA · Middle East
How we secure OT

End-to-end OT, ICS & IoT security

From assessment and segmentation to monitoring, response and compliance - protecting the systems that run your operations.

AssessOT/ICS/IoT risk and vulnerability assessment.
SegmentZone isolation to limit lateral movement.
Access controlLeast-privilege access to critical systems.
MonitorReal-time OT threat detection and alerting.
RespondIncident response to contain and restore.
ForensicsRoot-cause investigation and evidence.
TrainSecurity awareness for OT staff.
ComplyNIST, ISM, ISO 27001, IEC 62443.
How we segment OT

From enterprise IT down to the physical process

We secure every layer of the Purdue model, with the Industrial DMZ enforcing the boundary between your IT and OT.

IT / Enterprise
5
Enterprise / Corporate IT
ERP and business systems across the organisation.
Enterprise systems · IT-OT exposure
4
Site Business / IT
Site email, scheduling and local IT supporting the plant.
Site IT · user access · email
3.5
Industrial DMZ (IDMZ)
The mandatory, non-routable boundary between IT and OT.
Zone boundary · brokered flows
OT / Industrial
3
Site Operations
MES, historians and operations management for the site.
Historians · MES · ops servers
2
Area Supervisory Control
SCADA and HMI supervising each production area.
SCADA · HMI · supervisory access
1
Basic Control
PLCs, RTUs and controllers driving the process.
PLCs · RTUs · controller integrity
0
Physical Process
Sensors, actuators and the physical plant itself.
Sensors · actuators · process signals

The Purdue model runs IT at the top and OT at the bottom, and the Industrial DMZ at Level 3.5 is the line between them. A compromised business network should never reach a PLC directly - a well-formed IDMZ brokers every flow between IT and OT, so an incident up top cannot cascade down into the physical process.

Aligned to your sector

The standards critical infrastructure is measured against

Rail, aviation and industrial operators each answer to specific regulators - we assess and align your OT programme to the right ones.

Rail & Signalling

CLC/TS 50701IEC 63452EU CRA

Signalling, interlocking and trackside radio must stay secure and available across 30+ year system lifecycles.

  • Railway Cyber Risk Assessment (RCRA)
  • SBOMs and 24-hour vulnerability reporting
  • Supply-chain security for long-life assets

Aviation & Avionics

DO-326ADO-356AFAA / EASA

Airworthiness security must be evidenced to FAA and EASA to support aircraft and system type-certification.

  • PASRA / ASRA security risk assessment
  • System Security Verification (SSV)
  • Domain isolation (Wi-Fi vs control)

SCADA & OT Infrastructure

ISA/IEC 62443NIST SP 800-82Zones & Conduits

Legacy control systems need protection that reduces risk without disrupting live, safety-critical operations.

  • SL-T targeting per 62443-3-2
  • Passive asset ID, OT-aware NDR
  • Non-disruptive protocol testing
Safe by design

We secure OT without disrupting it

Live, safety-critical operations demand a different approach to IT.

We secure OT without disrupting it. Standard IT tactics - aggressive scans, credential brute-forcing - can crash legacy Level 1 and 2 PLCs and trigger safety incidents. Instead we use passive asset identification and OT-aware network detection (NDR), monitoring Modbus, DNP3 and OPC UA safely and non-intrusively.

We assess and align your environment to the standards your regulators expect - IEC 62443, NIST SP 800-82, CLC/TS 50701 and DO-326A among them - and reduce real risk without disrupting operations.

Ready when you are

Let's talk about ot / ics / iot security

Book a free assessment and we'll show you where you stand and the practical next steps - scoped to your environment and budget.