Why IT and OT security integration is inevitable for Ukrainian businesses in 2026
In 2026, Ukrainian enterprises, particularly in the manufacturing, energy, and utilities sectors, face escalating cyber threats. The digitalization of industrial processes, as part of Industry 4.0, leads to the convergence of traditionally isolated operational technologies (OT) with corporate IT networks, creating new vectors for cyberattacks. The 2023 Dragos report 1 highlights a rising number of incidents affecting industrial systems, alongside heightened geopolitical threats that target critical infrastructure. Protecting OT/ICS is becoming a critical business imperative to ensure production continuity and national security.
Integrating IT and OT security allows for the creation of a unified protection strategy that considers the unique requirements of both environments. This enables centralized threat monitoring, faster incident response, and more effective risk management. Without such integration, enterprises remain vulnerable to attacks that could lead to production shutdowns, financial losses, equipment damage, and threats to human life.
Key differences between IT and OT environments: Challenges for a unified security strategy
Fundamental differences between IT and OT environments pose significant challenges for developing a unified security strategy. In IT, the priority is data confidentiality, integrity, and availability (the CIA triad), whereas in OT, the primary focus is process availability, safety, and integrity (the ASI triad), with confidentiality being secondary 2. This means that any actions that could disrupt production continuity or personnel safety are unacceptable in OT.
Other key differences include:
- Asset lifecycle: OT assets (e.g., PLCs, SCADA systems) often have lifecycles spanning decades, while IT equipment is updated much more frequently. This results in the presence of legacy systems in OT that may be vulnerable to known attacks and may not support modern security tools.
- Protocols: OT environments use proprietary industrial protocols (Modbus, OPC, DNP3) that are not always compatible with standard IT security tools.
- Patching and update requirements: In OT, updates and patches may require shutting down production processes, which is highly undesirable. Therefore, patches are often applied less frequently or not at all.
- Real-time operation: Many OT systems operate in real-time, and any delays caused by security measures can have catastrophic consequences.
- Impact of failures: An IT failure might lead to data loss or service downtime, whereas an OT failure can cause physical damage, environmental disasters, or endanger lives.
Strategies for IT and OT security integration: From isolation to convergence
Traditionally, OT systems were protected through physical isolation (air gap), which involved complete disconnection from external networks. However, with the evolution of Industry 4.0 and the need for remote monitoring and management, this approach is becoming less realistic and effective.
Pros and cons of strategies:
- Air gap (physical isolation):
- Pros: High level of protection from external cyberattacks, simplicity of implementation for completely isolated systems.
- Cons: Inability for remote monitoring and management, lack of centralized visibility, difficulties with updates and data exchange, impractical for modern Industry 4.0 systems.
- Convergence and integration:
- Pros: Centralized monitoring and management, faster incident response, utilization of modern security tools, support for Industry 4.0 functionality.
- Cons: Increased attack surface, complexity of implementation and management, need for specialized technologies and expertise, potential impact on OT process stability if incorrectly configured.
Modern strategies focus on controlled convergence and security integration. A key approach is the application of the Purdue Model for network segmentation 3. This model divides the industrial network into logical zones (levels), from the corporate network to control devices, with clearly defined boundaries and security controls between them. Implementing demilitarized zones (DMZ) between IT and OT allows for controlling and filtering traffic passing between them, minimizing risks. This enables visibility and centralized management while preserving critical OT functionality.
Effective integration requires collaboration between IT and OT teams, developing joint security policies, standards, and procedures. This includes identity and access management, security event monitoring, vulnerability management, and incident response, all adapted to OT specifics.
A practical framework for assessing and implementing OT/ICS security
For Ukrainian enterprises, it is critical to have a practical framework for assessing the current state of OT/ICS security and planning its integration with IT security. Such a framework can be based on international standards, such as the NIST Cybersecurity Framework (NIST CSF) 4 or the ISA/IEC 62443 series of standards 2, adapted to Ukrainian realities.
OT/ICS security maturity assessment includes:
- Identify: Defining all OT assets, their functions, vulnerabilities, and risks.
- Protect: Implementing security controls to safeguard OT systems.
- Detect: Monitoring OT networks for anomalies and signs of attacks.
- Respond: Developing incident response plans specific to OT.
- Recover: Plans for recovery after cyber incidents.
Assessment and recommendations table for IT and OT security integration
| Assessment criterion | IT environment | OT environment | Integration recommendations |
|---|---|---|---|
| Security priority | Confidentiality, integrity, availability | Availability, safety, integrity | Develop policies that consider both priorities, with an emphasis on process safety in OT. (Based on ISA/IEC 62443 2) |
| Asset lifecycle | Short (3-5 years) | Long (10-20+ years) | Implement virtualization, microsegmentation, and compensating controls for legacy OT systems. (Based on NIST SP 800-82 5) |
| Patching and updates | Regular, automated | Infrequent, manual, requires downtime | Plan patching during scheduled shutdowns, use virtual patches, test updates in isolated environments. (Based on ISA/IEC 62443 2) |
| Network protocols | Standard (TCP/IP, HTTP/S) | Proprietary (Modbus, OPC, DNP3) | Use specialized Next-Generation Firewalls (NGFW) and Intrusion Detection/Prevention Systems (IDS/IPS) for OT protocols. (Based on NIST SP 800-82 5) |
| Impact on production | Service downtime, data loss | Physical damage, production shutdown, threat to life | Prioritize continuity and safety, meticulous planning and testing of all changes. (Based on ISA/IEC 62443 2) |
| Access management | Detailed, role-based | Often less granular, shared accounts | Implement centralized Identity and Access Management (IAM) with the principle of least privilege, Multi-Factor Authentication (MFA). (Based on NIST CSF 4) |
Key technologies and solutions for protecting industrial systems
Effective OT/ICS protection requires the application of specialized technologies that can operate in the unique conditions of industrial networks and integrate with existing IT security systems. It is important to remember that any changes in the OT environment require extreme caution and meticulous planning to avoid impacting the stability and safety of production processes. System integrators can assist with the selection and implementation of such solutions.
- Intrusion Detection/Prevention Systems (IDS/IPS) for OT: These systems are specifically designed to monitor industrial protocols and detect anomalies that may indicate a cyberattack or malfunction. For example, they can detect unauthorized Modbus commands or changes in PLC logic.
- Identity and Access Management (IAM) solutions in OT: Implementing centralized IAM systems allows for controlling access to OT assets, ensuring the principle of least privilege and Multi-Factor Authentication (MFA) for operators and engineers. This may include integration with corporate user directories.
- OT asset monitoring and visualization tools: Platforms for inventorying and monitoring OT assets provide a complete picture of connected devices, their status, and vulnerabilities, which is the foundation for effective security management. For example, they can automatically detect new devices on the network and their vulnerabilities.
- Centralized Security Information and Event Management (SIEM) platforms with OT data integration: Integrating event logs from OT systems into a corporate SIEM system allows IT teams to gain a single point of view on all security incidents, regardless of whether they originate from IT or OT. This significantly accelerates detection and response.
- Next-Generation Firewalls (NGFW) with OT functionalities: Modern NGFWs can provide deep packet inspection for industrial protocols, allowing for granular access policies and detection of malicious activity. For example, blocking unauthorized access to specific PLC functions.
The future of IT/OT convergence and security in Ukraine
In 2026 and beyond, the convergence of IT and OT is likely to deepen. The increasing number of connected devices, the use of cloud technologies, and data analytics in industrial processes will require continuous development of security strategies. Ukrainian enterprises must focus on building a cybersecurity culture that encompasses both IT and OT personnel.
Key future directions include:
- Training and awareness: Regular training for IT and OT teams on threat specifics and security best practices.
- Collaboration: Close interaction between IT and OT departments for joint development and implementation of security policies, threat information sharing, and incident response coordination.
- Automation: Implementing automation tools for monitoring, detecting, and responding to threats in OT environments.
- Standard compliance: Adherence to international and national cybersecurity standards for critical infrastructure.
Softline IT helps plan and implement cybersecurity solutions: from auditing the current state to an agreed-upon plan for changes.
Softline IT helps teams plan and implement cybersecurity, from an assessment of the current environment to an agreed change plan.
