Your factory floor is now
part of the attack surface.

24/7 OT visibility without touching your processes

OT monitoring requires a fundamentally different approach from IT monitoring. The team understands OT protocols (Modbus, OPC UA, DNP3, Profinet), knows normal process behaviour and recognises which deviations indicate a threat. An unexpected write command to a PLC is not an error message, it is potentially an attack.

Monitoring is set up passively: no active scans, no agents on OT systems. Network traffic is mirrored and analysed without affecting operations. Detection rules are aligned with OT-specific threats and your process environment.

DEFION combines IT and OT monitoring in one integrated picture. An attacker moving through IT to reach the OT network is tracked across the complete chain. IT security and OT security are no longer separate disciplines.

OT environments were never designed for today's threat landscape

Industrial control systems were built for availability and reliability, not security. Connecting them to IT networks and the internet creates risks they were never designed to handle.

• OT systems often run for decades without patching. Legacy protocols like Modbus have no built-in authentication. A single compromised IT workstation can be the entry point to your entire production environment.
• IT monitoring tools do not understand OT protocols or process behaviour. A Modbus write that looks like routine traffic to an IT analyst may be a targeted manipulation of a physical process.
• Ransomware groups and nation-state actors are increasingly targeting OT environments. NIS2 mandates monitoring and incident reporting for operators of essential services. The regulatory and operational risk is real and growing.

What is monitored

Deliverables

• 24/7 OT security monitoring
• OT asset inventory (continuously updated)
• Anomaly and threat notifications with OT context
• Monthly OT security report with trends
• Quarterly review with OT and IT teams
• Compliance reporting for IEC 62443 and NIS2

Which organisations benefit from OT Security Monitoring?

OT Security Monitoring is essential for any organisation where a cyber incident in the operational environment can have direct physical, safety or business continuity consequences.

• Manufacturing companies with automated production processes
• Energy companies and utilities
• Water treatment and distribution companies
• Transport and logistics
• Organisations that must demonstrate NIS2 or IEC 62443 compliance

NIS2 requires operators of essential services to implement appropriate security measures and report significant incidents. OT Security Monitoring provides the visibility and reporting needed to comply.