OT Cybersecurity Best Practices for SMBs: System Hardening for an OT Environment

Dragos OT-CERT’s monthly guidance provides practical system-hardening best practices for ICS/OT environments aimed at under-resourced organizations and SMBs. The blog lists seven concrete hardening areas with procedural steps—removing non-essential components, restricting remote access, changing default passwords, enforcing least privilege, managing firmware updates, identifying and patching vulnerabilities, and other security measures—while directing readers to free OT-CERT resources, toolkits, and membership to help implement and track these controls.