What are the cybersecurity considerations for SIS?

SIS cybersecurity considerations: network segmentation (SIS on separate network from business systems, firewalls with restrictive rules), access control (strong authentication, role-based access, no remote programming without strict controls), security by design (minimize attack surface, disable unused services), patch management (test patches before deployment, maintain inventory), monitoring (log access and changes, detect anomalies), hardening (secure configuration of logic solvers and engineering stations), and physical security (restrict access to SIS cabinets and programming terminals). Standards: IEC 62443 for industrial control system security. Balance security with safety availability - overly restrictive security could delay legitimate safety modifications.