M&A (mergers and acquisitions) in operational environments poses an immediate challenge of understanding everything quickly without disrupting operations. Unlike IT systems, OT environments can’t handle unexpected changes where even minor issues can lead to downtime, safety concerns, or compliance problems. Still, organizations need to quickly review new assets, identify risks, and bring them under control, often without full visibility.
Balancing Integration with Risk
Post-acquisition, stakeholder priorities often diverge. For instance, corporate leadership pushes for enterprise-wide dashboards and standardized KPIs, finance focuses on performance trending and ROI visibility, reliability teams seek unified operational analytics across assets, and security insists that integration introduces zero additional exposure. Balancing these competing demands makes integration both critical and complex.
Traditional OT integration approaches can be slow and introduce significant risk. Direct network connections increase the likelihood of cross-contamination, while trust relationships, routing, and identity integration can create new attack paths. Challenges such as overlapping IP spaces and domains often lead to disruptive re-IP efforts or complex network address translation schemes.
A diode-based approach provides a cleaner, streamlined alternative that enables organizations to integrate data without connecting networks.
The Value Proposition
Organizations can extract historian and process data from an acquired environment, such as PI systems or OPC-UA sources, while:
- Keeping each network operationally independent
- Avoiding immediate re-IP, domain trust, and routing redesign
- Reducing the chance that one environment’s compromise becomes the other environment’s incident
This model aligns with established OT security best practices, particularly the use of unidirectional gateways and data diodes. These technologies enable strictly controlled, one-way data flows, ensuring that only authorized information is transmitted while preventing upstream threats or lateral movement between networks.
Something Concrete: PI-to-PI Over a One-way Boundary
Many M&A teams already think in terms of “replicate the historian.” That idea maps directly to the use case of the unidirectional gateway and data diode boundary.
PI Architecture
PI Database replication provides a method for one-way data transfer of PI data from the acquired organization. MetaDefender Netwall supports both historical backfill and real-time snapshot values being transmitted across the hardware-enforced boundary. In alignment with best practices, we’re providing a stronger alternative to purely software-enforced controls.
OPC-UA Architecture
In some acquisitions, the target has modern OPC UA aggregation but inconsistent or incompatible historian practices. With MetaDefender Netwall, you can still safely transfer data for integration into your PI ecosystem by leveraging its OPC UA connector and using the AVEVA PI connector for OPC UA. This connector is designed to copy OPC UA contextual time-series data into the PI ecosystem.
“No re-IP” is a Feature, Not a Compromise
A diode-based use case is particularly valuable in the early stages of OT M&A integration because it enables organizations to begin extracting value without immediately incurring risk. By avoiding the need for direct network integration, companies can maintain stability in acquired operations while still gaining access to critical data.
At the same time, security teams can apply a “quarantine and observe” mindset, monitoring the acquired environment, assessing risks, and identifying vulnerabilities before deeper integration. This approach does not limit future flexibility. Organizations retain the option to fully integrate networks later. This can be implemented after completing asset inventory, system hardening, and remediation.
Industry-Leading Data Diodes and Unified IT/OT Security Solutions
MetaDefender Optical Diode™ solutions offer hardware-enforced one-way data transfer between IT and OT networks, supporting secure data replication and operational visibility without compromising network isolation.
To learn more about how OPSWAT can help reduce exposure risks and support operational continuity during OT M&A activities, talk to an expert today.
