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Introduction
Operational Technology (OT) and Industrial Control Systems (ICS) cybersecurity is critical for protecting critical infrastructure from cyber threats. With increasing attacks on industrial systems, professionals must stay updated with the latest tools and techniques. This article compiles the best free resources, including courses, labs, and GitHub repositories, to help you build expertise in OT/ICS security.
Learning Objectives
- Understand key OT/ICS cybersecurity concepts and best practices.
- Gain hands-on experience through free labs and GitHub repositories.
- Learn how to secure IT-OT convergence and mitigate risks.
1. FREE 25-Hour Course on OT/ICS Cybersecurity
π Course Link
What Youβll Learn
This comprehensive course covers:
- Fundamentals of ICS/OT systems.
- Threat modeling and risk assessment.
- Security frameworks like NIST and IEC 62443.
How to Use It
1. Enroll via the link.
2. Follow modules sequentially for structured learning.
3. Apply concepts in simulated environments.
2. FREE Labs for Hands-On ICS/OT Security Practice
π Labs Link
Key Features
- Virtualized ICS environments for attack simulations.
- Exercises on PLC hacking and network segmentation.
Step-by-Step Guide
1. Download lab files from the repository.
- Set up a virtual machine (VM) for safe testing.
3. Practice exploits like Modbus TCP manipulation.
3. Top 8 GitHub Repos for OT/ICS Cybersecurity
π GitHub Repos
Must-Explore Repositories
- ICS-Security-Tools β Open-source tools for vulnerability scanning.
- GRFICS β ICS attack simulation framework.
How to Use Them
1. Clone repositories using:
git clone [bash]
2. Run tools in a sandboxed environment to avoid real-world risks.
- Why You Should Never Connect AD to ICS/OT
π Link
Security Risks
- Lateral movement from IT to OT networks.
- Increased attack surface for ransomware.
Mitigation Steps
1. Implement network segmentation:
New-NetFirewallRule -DisplayName "Block-IT-OT" -Direction Outbound -RemoteAddress 192.168.1.0/24 -Action Block
2. Use unidirectional gateways for data flow control.
5. Recognizing a Hacked ICS/OT System
π Visual Guide
Indicators of Compromise (IoCs)
- Unusual PLC command executions.
- Abnormal network traffic patterns.
Detection Command (Linux)
tcpdump -i eth0 'port 502' -w modbus_traffic.pcap
Analysis: Capture Modbus traffic to detect malicious commands.
6. Best Firewall Practices for IT/OT Separation
π Guide Link
Defense Strategy
- Multi-layered firewalls with strict rule sets.
Windows Firewall Rule Example
netsh advfirewall firewall add rule name="Block-OT-Access" dir=in action=block protocol=TCP remoteport=44818
Purpose: Blocks unauthorized access to EtherNet/IP ports.
7. OT Cybersecurity Coloring Books (Yes, Really!)
π OT Coloring Book | Cyber Coloring Book
Why Itβs Useful
- Simplifies complex concepts for beginners.
- Great for training non-technical staff.
8. How to Protect ICS/OT Systems
π Protection Guide
Key Actions
1. Disable unnecessary services:
systemctl disable modbus-server
2. Implement least-privilege access.
9. Top OT/ICS Certifications to Boost Your Career
π Certifications List
Recommended Certs
- GIAC Global Industrial Cyber Security Professional (GICSP)
- ISA/IEC 62443 Cybersecurity Certifications
10. Join the OT/ICS Cybersecurity Newsletter
π Newsletter Signup
Why Subscribe?
- Weekly threat intelligence updates.
- Exclusive access to webinars.
What Undercode Say
- Key Takeaway 1: Free resources can accelerate OT/ICS cybersecurity learning without financial barriers.
- Key Takeaway 2: Hands-on labs and GitHub repos provide real-world attack simulations.
Analysis
The increasing convergence of IT and OT demands stronger security measures. With ransomware attacks like Industroyer2 targeting critical infrastructure, professionals must leverage free training to stay ahead. The curated list above bridges knowledge gaps, offering structured learning paths for both beginners and experts.
Prediction
By 2025, OT cyberattacks will rise by 200%, emphasizing the need for skilled defenders. Early adopters of these resources will lead the charge in securing industrial systems.
Final Note: Bookmark these links, practice regularly, and stay updated with evolving threats. π
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