Cybersecurity Best Practices for Industrial Control Systems > 자유게시판

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The integrity of industrial control systems depends on robust cybersecurity measures to prevent disruptions that could endanger lives and infrastructure

From oil refineries to smart grids, critical infrastructure is becoming more digitized and interconnected, significantly expanding its attack surface

Implementing strong cybersecurity best practices is not optional—it is a necessity

Begin with a comprehensive asset discovery process across your operational technology landscape

Document every component—from PLCs and HMIs to communication protocols and middleware

Knowing what you have is the first step toward securing it

Classify systems by criticality and prioritize protection for those that directly impact public safety or production continuity

Apply network zoning to create clear boundaries between OT and IT domains

Deploy industrial-grade firewalls and DMZs to enforce strict communication policies

Permit traffic only on known, necessary ports and protocols

Avoid using default passwords and ensure all devices are configured with strong, unique credentials

Patch management must prioritize stability—never deploy untested fixes on live control systems

Enforce strict authorization policies across all ICS endpoints

Use role-based permissions to ensure employees and contractors only have access to the systems they need to do their jobs

Require biometrics, tokens, or one-time codes for privileged access

Maintain centralized audit trails for every login, command, and configuration change

Look for anomalies such as unusual login times, repeated failures, or unauthorized command execution

Security training must be tailored to the unique risks faced by ICS operators

Misconfigurations, social engineering, and procedural lapses frequently lead to breaches

Educate your staff on how to recognize phishing attempts, report unusual behavior, and follow secure work practices

Make cybersecurity part of onboarding and conduct regular refresher training

If remote connectivity is unavoidable, implement hardened, encrypted pathways

Deploy TLS-enabled portals and IPsec-based VPNs designed for industrial use

Never rely on TeamViewer, AnyDesk, or similar consumer platforms in critical environments

Restrict remote sessions to approved personnel and scheduled windows

Schedule automated, encrypted backups of PLC programs, SCADA configurations, 転職 技術 and historical logs

Store backups offline or in a secure, isolated location

Test restoration procedures periodically to ensure they work when needed

Your plan must account for safety shutdowns, fallback modes, and manual overrides

Define clear roles: plant managers, IT security, vendor support, and emergency responders

Work with vendors to understand the security posture of your equipment

Demand written assurances for vulnerability remediation timelines

IEC 62443 to guide your security program

Finally, conduct regular security assessments and audits

Use both automated tools and certified ethical hackers to uncover hidden flaws

Share findings with management and allocate resources to address gaps

ICS security is an ongoing lifecycle, not a project with an end date

By embedding these practices into your daily operations, you build resilience against evolving threats and help safeguard the infrastructure that keeps communities running