Cyber resilience spans governance, processes, technology, and response capabilities. In connected OT environments, network security has become a critical enabler as industrial systems integrate with IT platforms, AI tools, remote services, and legacy assets, increasing the pathways through which cyber risks can propagate.
Standards such as IEC 62443 address these risks through segmentation, defining zones and conduits to enforce defense-in-depth. Secure networks therefore do not eliminate threats — they limit how far compromise can propagate.
While organizations may not always reduce threat probability, network architecture can significantly reduce operational impact. In OT environments, segmentation, controlled access, and containment are the most practical mitigation strategies.
To apply mitigation effectively, organizations must understand where risks exist across the OT network and deploy appropriate security solutions to maintain reliable industrial operations.
In connected OT networks, cyber risks do not originate from a single point; they can emerge from multiple layers of system networks. Identifying where these risks arise enables targeted mitigation and helps prevent threats from propagating across industrial operations.
Industrial networks often connect IT, OT, and external systems. Poor segmentation or access control can allow attacks to spread across operations.
Serial device servers and gateways connect legacy equipment to IP networks, potentially introducing new attack paths into OT environments.
WLANs expand connectivity but can increase the attack surface without proper access control and visibility.
Engineering workstations, HMIs, and SCADA systems can become entry points for malware, unauthorized access, or command manipulation.
Industrial devices and network infrastructure may be exposed to tampering or unauthorized physical access.
Harsh conditions such as heat, dust, moisture, or unstable power can affect network reliability and system availability.
Limited asset visibility and insufficient monitoring can delay incident detection and increase operational risk.
Identifying risks is only the beginning. Moxa solutions help organizations control those risks through secure networking technologies and hardened devices designed to prevent threats and manage vulnerabilities.
Moxa secure networking solutions are designed in alignment with IEC 62443, supporting secure architectures and device hardening in OT environments. As more industrial systems must meet IEC 62443-3-3 system-level requirements, the Moxa Cybersecurity Service Package (CSP) helps organizations prepare documentation and accelerate certification readiness.
System integrators, machine builders, and asset owners preparing OT systems for IEC 62443-3-3 certification who need networking expertise and practical guidance
