Securing the Grid Edge with Software Defined Networking: IT/OT Modernized Grid Infrastructure

As power grids evolve toward more decentralized and distributed architectures, securing the grid edge has become a critical challenge. The grid edge, which includes devices and systems at the periphery of the power grid such as distributed energy resources, smart meters, and electric vehicle charging stations, presents both opportunities and vulnerabilities. The adoption of Software Defined Networking (SDN), a network management approach that provides centralized management and visibility of network traffic, can greatly enhance the security and flexibility of grid edge environments.

For OT-SDN to be effectively deployed at the grid edge, IT and OT teams both have a strong role to play. These two functions with historically distinct areas of ownership can come together to address the unique requirements of both network security and operational reliability.

The Role of SDN

OT-SDN brings many advantages to securing the grid edge. Traditional networking technologies often lack the flexibility needed to handle the distributed nature of modern energy grids. With the increased adoption of IoT-enabled devices, the grid edge must contend with constantly shifting power flows and data streams. Software defined networking allows for real-time adjustments to network configurations based on changing operational needs, enabling more efficient energy distribution.

From a security perspective, SDN’s centralized management provides a higher level of visibility across the network. It also takes a deny by default approach which helps mitigate potential threats. Network segmentation, a fundamental piece of the OT-SDN solution, can isolate critical infrastructure components from potentially compromised devices at the grid edge. In the event of a cyberattack or abnormal behavior detected at the edge, SDN allows for rapid reconfiguration of the network to contain threats and minimize their impact on overall grid stability.

Bridging IT and OT Silos

Securing the grid edge is enhanced through the collaboration between IT and OT teams. Traditionally, IT systems are concerned with data flow, cybersecurity, and the broader corporate network, while OT systems prioritize physical processes and equipment operation. These varied approaches create challenges when it comes to network and data management.

To effectively secure the grid edge, IT and OT teams can collaborate in several key areas:

• Unified Security Policies: IT / OT can jointly define security policies to protect the physical infrastructure and its digital systems.
• Real-time Monitoring and Response: IT / OT can detect anomalies in data traffic and operational metrics, for a rapid response to potential cyber threats.
• Cross-functional Teams: IT / OT professionals can together manage the converged, modernized infrastructure.

OT-SDN offers significant advantages throughout the enterprise for IT and OT teams. The Veracity OT Network Controller is an OT-SDN software platform that is ideal for OT teams. Following a rule-based, deny by default, zero-trust cybersecurity methodology, the Veracity platform uses IT-friendly technology that is optimized for OT environments – making collaboration between the IT and OT easier than ever before.

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