OT Cybersecurity Solutions
Vendor-agnostic OT/ICS security solutions aligned to the Purdue Model and ISA/IEC 62443 — engineered for industrial availability, process safety, and MEA regulatory compliance.
Defense Architecture
Where Proact Engineers Intervene
The Purdue Model defines the hierarchy of industrial control systems. Proact applies defense-in-depth engineering at every critical layer boundary.
Enterprise Network
Corporate IT systems, ERP, business applications
Site Business Planning & Logistics
Plant-level IT infrastructure, MES, ERP integration points
PROACT Primary Enforcement Boundary
Industrial DMZ · Data Diodes · OT Firewall DPI · Passive Monitoring Sensors
Operations Management
SCADA, historian servers, operations network, alarm management
Area Supervisory Control
DCS, HMI, engineering workstations, local SCADA nodes
Basic Control
PLCs, RTUs, PACs — deterministic control loop execution
Physical Process
Field instruments, sensors, actuators, drives, valves — physical plant operations
Proact's ultimate protection objective: zero unplanned process events from cyber incidents
Every Proact engagement is scoped against this reference architecture. Our engineers identify and close the boundary gaps that enable lateral movement from enterprise IT to physical process control — the exact path used in documented ICS attacks including TRITON/TRISIS, Industroyer, and Stuxnet variants.
Technical Capabilities
Our Solution Portfolio
Vendor-agnostic OT security solutions selected and integrated based solely on your environment's technical constraints and regulatory obligations.
Network Segmentation & Zone Architecture
Industrial networks designed for real-time deterministic communication cannot tolerate the traffic patterns of enterprise IT. Proact designs and engineers zone and conduit architectures per ISA/IEC 62443-3-3, enforced at hardware boundaries with industrial-grade firewalls configured for protocol-level deep packet inspection.
- ISA/IEC 62443-3-3 compliant zone/conduit design and engineering
- Industrial DMZ deployment between Layer 3 and Layer 4
- OT-aware NGFW configuration for Modbus, OPC UA, DNP3, Profinet, EtherNet/IP
- Hardware-enforced unidirectional security gateways (data diodes)
- Industrial VLAN segmentation and managed switch hardening
Identity & Privileged Access Control
Unauthorized access to engineering workstations, DCS, and SCADA HMIs is a leading attack vector. We implement least-privilege access frameworks purpose-built for OT constraints — including session recording for all privileged and vendor remote sessions, with strict jump-server enforcement.
- Role-based access control (RBAC) tailored to control system roles
- Multi-factor authentication for OT HMI and EWS access
- Privileged Access Management (PAM) with session isolation and recording
- Vendor and third-party remote access security gateways
- Identity governance and access reviews for ICS environments
Endpoint Hardening & Protection
OT endpoints — PLCs, HMIs, DCS engineering workstations, historian servers — typically run unpatched legacy operating systems due to vendor certification constraints. We deploy OT-compatible protection that detects threats through application whitelisting and behavioral anomaly detection without disrupting real-time control loop execution.
- Application whitelisting for HMIs and engineering workstations
- OT-compatible endpoint detection (no behavioral agent interference with RT loops)
- USB and removable media control with device allowlisting
- File integrity monitoring for critical configuration and ladder logic files
- Legacy Windows OS hardening, account policy enforcement, and service minimization
Passive Asset Discovery & Inventory
You cannot protect what you cannot see — but active scanning on live OT networks can freeze PLCs and trip processes. Proact deploys passive network sensors that reconstruct a comprehensive asset inventory from observed traffic: device type, firmware version, open ports, communication peers, and known CVEs — with zero packet injection.
- Passive-only OT asset discovery — zero active probes on field networks
- Real-time asset inventory: device fingerprint, firmware, and CVE correlation
- Communication peer mapping and baseline traffic profiling
- Software and firmware version change detection and alerting
- Asset risk scoring integrated with vulnerability intelligence feeds
Passive OT Monitoring & Anomaly Detection
OT threats often persist for months before discovery. Our passive DPI monitoring platforms baseline every industrial communication flow and alert on behavioral deviations — new devices, protocol anomalies, unauthorized command sequences, and lateral movement attempts — without ever touching the control plane.
- Continuous passive DPI traffic analysis across all OT network segments
- Behavioral anomaly detection and process communication baselining
- Industrial threat intelligence integration for ICS-specific threat actors
- OT-native SIEM rules, alert triage, and incident playbooks
- ICS/SCADA digital forensics and incident response support
Compliance & Regulatory Alignment
MEA asset operators face overlapping mandatory frameworks: Saudi NCA ECC-1:2018, UAE NESA IAS, Dubai DESC ISR, Kuwait CITRA, and international benchmarks including ISA/IEC 62443 and NIST SP 800-82. Proact delivers localized compliance engineering that translates regulatory requirements into physical network controls — not just policy documents.
- Saudi NCA ECC-1:2018 and CSCC-1:2019 compliance engineering
- UAE NESA IAS and Dubai DESC ISR architecture validation
- ISA/IEC 62443 CSMS gap analysis and Security Level target mapping
- NIST SP 800-82 Rev 3 alignment and remediation workflows
- Regulatory audit preparation and evidence collection support
Critical Design Principle — Why Traditional IT Security Fails on the Plant Floor
Traditional IT security priorities are ordered as Confidentiality, Integrity, and Availability (CIA). On the industrial floor, this pyramid is inverted: Availability, Safety, and Reliability are paramount. Proact strictly prohibits the use of active network scanning or standard IT penetration tools within production environments. A single malformed probe can saturate low-bandwidth field networks or freeze a legacy PLC control loop, resulting in unplanned shutdowns. Our architectures utilize 100% passive monitoring, strict hardware-enforced zone boundary isolation, and deterministic traffic validation to guarantee that operations remain secure, compliant, and continuously running.
Why Choose Proact
The Proact Difference
Vendor-Agnostic
We select and integrate technology based exclusively on your environment's requirements — no vendor partnerships influence our recommendations.
OT-Native Engineering
Every solution is validated against industrial protocol constraints and operational uptime requirements before deployment.
MEA Regulatory Depth
Local engineers fluent in NCA ECC, NESA, CITRA, and DESC ISR — not just generic international frameworks.
Standards-Aligned Delivery
All implementations are mapped to ISA/IEC 62443, NIST SP 800-82, and sector-specific regulatory mandates.
Find the Right Solution for Your Environment
Our engineers will assess your specific OT environment against the Purdue Model and recommend the best-fit controls for your operational and regulatory requirements.