Services

OT System & Device Hardening

Securing Operational Technology Assets By Strengthening System Configurations And Minimizing Vulnerabilities

The Challenge

OT systems and devices often operate with outdated firmware and software due to long lifecycle expectations, making them prime targets for exploitation. These systems have specialized functions, and improper changes can disrupt critical industrial processes. The diversity of device types, protocols, and vendor-specific controls creates complexity in applying consistent security measures.

Key challenges include:

      • Limited patching options and vendor support for legacy devices

      • Balancing security updates with operational uptime requirements

      • Configuring devices securely without impacting functionality or communication

      • Addressing default credentials, weak configurations, and unnecessary services

      • Lack of standardized security baselines across diverse OT assets

      • Managing device inventories and change controls effectively

Without thorough hardening, these vulnerabilities expose OT environments to risks like ransomware, unauthorized access, and operational disruption.

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The Solution

Defy Security delivers comprehensive system and device hardening services that focus on securing OT assets without sacrificing reliability. Our approach begins with detailed asset discovery and vulnerability assessment to identify high-risk targets.

Our hardening strategy includes:

      • Establishing tailored security baselines for each device type and manufacturer

      • Removing or disabling unnecessary services, protocols, and accounts

      • Implementing strong authentication and access controls

      • Coordinating with vendors to safely apply patches and firmware updates

      • Continuous monitoring and validation to ensure hardened configurations remain intact

      • Training OT teams on best practices for device security and maintenance

By combining deep OT expertise with security rigor, Defy Security helps protect critical systems from evolving cyber threats while maintaining operational integrity.

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Device hardening isn’t just about security—it’s about preserving operational trust.

Your Proactive Security Partner

Customers work with Defy Security to simplify their buying experience. We provide initial assessment and analysis of technologies and custom proof of concepts. Our business analysis of licensing and financing structure saves you money. We oversee implementation and operation with staffing and services to ensure success.

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