controls

Manufacturers are increasingly integrating IT systems with operational technology (OT), leading to heightened cyber threats such as ransomware, supply chain breaches, and attacks from nation-state actors. To enhance cyber resilience, it is crucial to segment IT and OT networks to prevent breaches on the IT side from affecting critical OT systems. Effective segmentation involves placing OT systems behind firewalls, restricting protocols, and using unidirectional gateways. Many manufacturing plants struggle with aging and undocumented devices, making security and monitoring challenging. Asset visibility tools can help map connected devices, enabling better inventory management and risk assessment. Attackers often use "living-off-the-land" techniques to navigate networks undetected, necessitating defenses that include behavioral analytics and application whitelisting. Incident response plans tailored for OT environments are essential, as production interruptions can have severe consequences. These plans should include scenarios like ransomware attacks and require regular testing and backups. For legacy systems that cannot be patched, isolation and monitoring are critical, along with virtual patching to block known exploits. Weak credentials pose a significant risk, so implementing role-based access control and multi-factor authentication is necessary. Security monitoring tools like SIEM and XDR should be used to consolidate data from IT and OT environments, providing alerts for potential attacks. Overall, cyber resilience in manufacturing focuses on minimizing risks and ensuring recovery without disrupting operations.