Case Study: OSI PI Historian Replication Using OWL Data Diodes
Overview
This case study examines the implementation of OSI PI Historian replication using Owl Cyber Defense data diodes to ensure unidirectional data transfer. The solution enables secure replication between an operational technology (OT) network and an enterprise IT environment, addressing the needs of high-security sectors such as critical infrastructure. By maintaining data integrity and confidentiality, the approach ensures compliance with stringent cybersecurity standards.
Client Profile
- Industry: Energy (Power Generation)
- Location: Middle East
Challenge
The client operates a power generation facility with rigorous cybersecurity requirements. The OT network, which manages industrial control systems (ICS), must remain isolated from the IT network to prevent external threats. However, the client also needed secure access to operational data for monitoring, analytics, and regulatory reporting.
Solution
An OSI PI Historian replication solution was implemented using unidirectional data transfer to:
- Safeguard the OT network from external threats.
- Enable replication of operational PI data to the IT network.
- Ensure compliance with regulatory frameworks such as IEC 62443 and NERC CIP.
Solution Components
- Primary OSI PI Historian (OT Network):
- An OSI PI server collecting and storing real-time operational data from ICS devices.
- Owl Data Diode:
- A hardware-enforced unidirectional gateway allowing only outbound data transfer from the OT to the IT network.
- Utilized Owl’s proprietary protocol for high-speed, reliable data transfer.
- Replication Middleware:
- Software that connects to the Primary OSI PI Historian and replicates PI Data Archive snapshots to the Replica OSI PI Historian.
- Replica OSI PI Historian (IT Network):
- A PI Data Archive instance receiving updates to maintain a synchronized replica of the primary historian.
- Supported real-time monitoring, analytics, and reporting for IT and business users.
Key Benefits
- Enhanced Security:
- Physical enforcement of unidirectional data flow eliminated the risk of cyberattacks propagating from the IT to the OT network.
- Regulatory Compliance:
- The solution adhered to industry standards and regulatory requirements.
- Scalability:
- The architecture supports additional replica historians and IT-side applications for future expansion.
- Reliable Data Access:
- Business units accessed operational data for decision-making without compromising OT security.
The implementation of OSI PI Historian replication using Owl data diodes provided the client with a secure and reliable method to replicate operational data while maintaining strict network segregation. This solution not only enhanced OT network security but also empowered business intelligence, analytics, and regulatory reporting capabilities. Owl’s robust technology and tailored integration demonstrated the feasibility of high-assurance historian replication in critical infrastructure environments.
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