Device Hardening & Networking segmentation

OT Cybersecurity

Hardening the Industrial Edge

Your industrial control systems (ICS) are the heartbeat of your operation. But in a connected world, are they truly protected? OT Cyber Security is not optional—it’s foundational. We specialise in the two most critical defences against industrial cyber threats: Device Hardening and Network Segmentation.

Why Focus on OT Security Now?

Traditional IT security measures fail in the complex, low-latency world of Operational Technology. A single breach can lead to production downtime, safety incidents, and massive financial loss.

Vulnerability: Many PLCs and controllers run on decades-old, insecure operating systems.
Impact: Cyber attacks increasingly target physical processes (e.g., pipeline, power grid).
Compliance: New industry regulations (e.g., NERC CIP, ISA/IEC 62443) demand robust security controls.

Industrial Device Hardening

Your controllers, HMIs, and engineering workstations are potential entry points. Device Hardening closes those doors by eliminating unnecessary services and securing configuration parameters.

What is Device Hardening?

We implement a rigorous, standardised process to minimise the attack surface of every single component in your control system environment.

Port & Service Lockdown

Disabling unused communications protocols (e.g., FTP, Telnet) and unnecessary listening ports.

Access Control

Implementing role-based access control (RBAC) and multi-factor authentication (MFA) for all critical engineering access points.

Secure Configuration

Changing default passwords, updating firmware (where safe and validated), and encrypting configuration files.

Patch Management

Establishing a safe, validated process for managing critical security updates without disrupting production.

Stop using 'admin/123' as your defense strategy.

We secure the core of your control systems.

OT Network Segmentation (The Moat Strategy)

No single device is perfectly secure. Network Segmentation creates layers of defence, isolating critical assets so a compromise in one area cannot spread throughout the plant. This is the foundation of a Zero Trust model for OT.

How We Build Your Secure Network

We apply recognised standards (ISA/IEC 62443) to divide your industrial network into secure, manageable zones and conduits.

Zone Definition

Classifying assets based on criticality (e.g., Safety Systems, Basic Control, Historian).

Physical/Logical Separation

Using Industrial Firewalls and Routers to enforce strict access rules between zones.

Protocol Filtering

Implementing Deep Packet Inspection (DPI) to verify that only authorised industrial protocols (e.g., EtherNet/IP, PROFINET) are allowed to cross segments.

DMZ Architecture

Creating a secure Industrial Demilitarised Zone (IDMZ) for safe, monitored data transfer between the OT and IT networks.

Segment	Purpose	Key Security Control
Safety Zone	SIS / Emergency Shutdown	Isolation & Physical Locks
Control Zone	PLCs, RTUs, I/O	Industrial Firewall Rules
Supervisory Zone	HMIs, SCADA	RBAC & Protocol Filtering
IDMZ	Data Gateway to IT / Cloud	Data Diode or Reverse Proxy