When cybersecurity meets the production floor
Industrial control systems were traditionally isolated islands — physically separated from the corporate network and the internet. Those days are over. Modern production environments are increasingly connected: machines communicate with ERP systems, remote maintenance access enables support from the manufacturer, IoT sensors deliver real-time data for quality assurance. This connectivity brings enormous efficiency gains, but it also opens attack vectors that simply did not exist ten years ago. This topic page helps you systematically secure your production environment without compromising operational efficiency.
IT/OT convergence: opportunity and risk at the same time
The convergence of IT (Information Technology) and OT (Operational Technology) is one of the defining trends in manufacturing. Where an IT network and a production network once existed in strict separation, these worlds are merging. There are good reasons for this: real-time data from production enables predictive maintenance, optimized processes and better decisions. But integration also means that classic IT threats such as ransomware, phishing and network attacks can suddenly reach the production floor.
The crucial difference between IT and OT lies in priorities. In IT, confidentiality often comes first: data must not fall into the wrong hands. In OT, availability is the top priority: a production line that stops unplanned costs real money with every minute. And while IT systems are regularly patched and updated, many OT systems run unchanged for decades because every update poses a production risk. You must account for these fundamental differences in your security strategy.
The Purdue model: network segmentation in production
The Purdue Enterprise Reference Architecture model is the standard for structuring industrial networks. It defines hierarchical zones — from the physical process level (Level 0) through the control level (Level 1-2) and the operations management level (Level 3) to the enterprise network (Level 4-5). Firewalls and demilitarized zones (DMZ) are deployed between these zones to control data flow and minimize the attack surface.
For mid-market manufacturing companies, the Purdue model is a pragmatic guide. You do not need to implement it in its purest form, but the basic concept of zoning and controlled data exchange between levels is essential. Our article on the Purdue model explains how you can implement segmentation in your specific environment and which technologies can help.
Securing SCADA and PLCs
SCADA systems (Supervisory Control and Data Acquisition) and programmable logic controllers (PLCs) form the backbone of industrial automation. They control valves, motors, pumps and entire production lines. Many of these systems were developed at a time when cybersecurity was not a concern. They use proprietary protocols without encryption, have no authentication or use hardcoded default passwords.
Securing these systems requires a different approach than in traditional IT. You cannot simply install antivirus software on a PLC or apply patches regularly. Instead, you rely on network segmentation, monitoring of OT traffic, hardened remote maintenance access and strict access management. Our article on SCADA security gives you concrete recommendations for the most common control systems.
Patch management in OT
Patch management in OT is a particular challenge. Unlike in IT, where patches should be applied promptly, every OT update requires careful risk assessment: is the security risk of the unpatched state greater than the risk that the patch disrupts production? This decision must be made individually for each system. Our article on OT patch management shows you how to establish a structured process that balances both security and operational stability.
Regulation: EU Machinery Regulation and NIS2
From 2027, the new EU Machinery Regulation will impose explicit cybersecurity requirements on machines and equipment. At the same time, NIS2 introduces stricter requirements for companies in the energy, manufacturing and chemicals sectors. If you operate in any of these industries, you should integrate the regulatory requirements into your OT security strategy early on. Our sector-specific NIS2 articles help you understand and implement the requirements for your specific sector.
