Its 2025, what are the major OEMs suggesting for security?

OT Security in 2025: What the Major OEMs Expect You To DoIndependent 2025 research from Claroty, Nozomi Networks, and Red Canary shows a clear pattern:
OT environments are facing rising risks from ransomware, exposed devices, wireless attacks, and identity abuse.The major OEMs — Rockwell Automation, Siemens, ABB, Schneider Electric, and Mitsubishi Electric — are aligned on what “good OT security” means in 2025.Below is a unified summary of their guidance, enhanced with 6-bit retro icons you can generate for your UI.---Rockwell AutomationRockwell Automation – OT Hardening with 62443 and NIST CSF• Risk-Based Endpoint Hardening
Baseline normal behavior, deploy OT-compatible endpoint protection, and monitor continuously.• Purdue-Aligned Network Segmentation
Firewalls, IDMZ, cell/area zones, and restricted protocols following ISA/IEC-62443-3-3.• Zero Trust for OT Devices
Verify device identity and apply least privilege before network access is allowed.• NIST CSF Lifecycle Alignment
Identify → Protect → Detect → Respond → Recover.
A continuous security cycle, not a one-time project.---SiemensSiemens – Secure Operation of Industrial Products• Protected Operating Environment
Siemens devices must run inside a segmented, secured OT architecture.• Strong Network Access Protection
Restrict flows between HMIs, engineering workstations, PLCs, and IT systems.• Secure Default Configuration
Follow Siemens’ hardening guidelines and maintain configuration baselines.---ABBABB – Vulnerability Management & Secure Configuration• Continuous OT Vulnerability Assessment
Prioritize safety and operational impact when patching is limited.• Secure Configuration Baselines
Disable defaults, restrict management interfaces, and enforce configuration control.• Compensating Controls Where Needed
Segmentation, virtual patching, and restrictive access when downtime is not possible.---Schneider ElectricSchneider Electric – Zero Trust, Segmentation & Supply Chain Security• Strong IT/OT Segmentation
Separate networks using DMZs and cell/area zoning to limit lateral movement.• Zero Trust Identity Enforcement
Verify every user, device, and connection — nothing is trusted by default.• Access Control & MFA
Unique accounts, RBAC, and MFA for engineering and remote-access workflows.• Patch & Supply Chain Governance
Regular audits, secure vendor requirements, and lifecycle patching processes.---Mitsubishi ElectricMitsubishi Electric – Zero Trust Remote Access & OT/IT Integration• Zero Trust Remote Access
Just-in-time access, session recording, time-bound privileges, and full auditing.• Integrated OT + IT Security
Combine OT expertise with modern identity, monitoring, and segmentation tools.• Standards-Aligned Controls
Remediation and monitoring aligned with NIST 800-53 and ISA/IEC-62443-3-3.---2025 TakeawaySegment first.
Control identity and enforce MFA.
Harden endpoints and monitor continuously.
Manage vulnerabilities with OT-realistic processes.
Run OT security as a formal program — not a “best effort.”