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Introduction:
Operational Technology (OT) and Industrial Control Systems (ICS) cybersecurity is a critical field, blending IT security with industrial infrastructure protection. With increasing cyber threats targeting critical infrastructure, professionals must upskill using free, high-quality resources. This guide compiles the best free tutorials, GitHub repos, and training to transition into OT/ICS security.
Learning Objectives:
- Understand the key differences between IT and OT cybersecurity.
- Learn hands-on techniques for securing industrial networks.
- Discover free certifications and tools to advance your OT/ICS career.
You Should Know:
- Switching from IT to OT Cybersecurity in Under 6 Months
🔗 https://lnkd.in/e5tYcVs3
Key Steps:
- Learn OT Fundamentals – Study Purdue Model, ICS protocols (Modbus, DNP3).
- Practice in a Lab – Use free tools like ICSDefender for simulations.
- Network with OT Pros – Join LinkedIn groups and attend DEF CON ICS Village.
Command to Test Modbus Communication:
python -m pip install pymodbus python -m pymodbus.client --host [bash] --port 502 --modbus tcp
This checks if a Modbus TCP device is reachable and responsive.
- 8 Best GitHub Repos for Free OT Cybersecurity Learning
🔗 https://lnkd.in/eUv2MCp3
Top Repos:
- GRASSMARLIN (ICS Network Mapping) – `git clone https://github.com/nsacyber/GRASSMARLIN`
– ICS-Security-Tools – `git clone https://github.com/ITI/ICS-Security-Tools`
How to Use GRASSMARLIN:
1. Run `./grassmarlin.sh` (Linux) or `grassmarlin.bat` (Windows).
- Load a PCAP file to analyze ICS traffic.
3. Hacking Your First OT/ICS System (Ethically!)
Steps:
- Set up a virtual lab using Conpot (ICS honeypot):
docker pull honeynet/conpot docker run -it -p 80:80 -p 102:102 honeynet/conpot
2. Scan with Nmap:
nmap -sV -p 80,102 [bash]
4. Wireshark for OT Traffic Analysis
Filter for ICS Protocols:
modbus || dnp3 || opcua
This isolates industrial protocol traffic in Wireshark.
5. Nmap for OT Network Security
Scan for ICS Devices:
nmap -sS -p 502,20000 --script modbus-discover.nse [bash]
Detects Modbus-enabled devices.
6. OT/ICS Certifications to Boost Your Career
Free Certs:
- ICS Cyber Security Certification (SANS) (Free intro courses)
- MITRE ATT&CK for ICS
What Undercode Say:
- Key Takeaway 1: OT security requires specialized knowledge—IT skills alone aren’t enough.
- Key Takeaway 2: Hands-on labs and free tools accelerate learning faster than certs alone.
Analysis:
The rise of ransomware attacks on critical infrastructure (e.g., Colonial Pipeline) highlights the urgent need for OT security experts. Professionals must master ICS protocols, defensive tools, and threat hunting to protect industrial networks.
Prediction:
By 2026, OT cybersecurity roles will grow 300% due to regulatory pressures (NIS2 Directive, CISA guidelines). Early adopters of ICS security training will dominate this high-demand field.
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IT/Security Reporter URL:
Reported By: Https: – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
