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Mike Holcomb offers a comprehensive 25-hour FREE course on OT/ICS Cybersecurity, covering essential topics for securing Industrial Control Systems (ICS) and Operational Technology (OT). Over 60,000 people have watched it on YouTube, and 1,000+ have taken it live.
Course Sections:
1. to ICS/OT Cyber Security
2. ICS/OT Cyber Security Overview
3. Control Systems & Protocols
4. Secure Network Architecture
5. Asset Registers & Control Systems Inventory
6. Threat & Vulnerability Management
7. OSINT for Industrial Controls
8. Incident Detection & Response
9. Industry Standards & Regulations
10. to ICS/OT Penetration Testing
11. Review Questions (100+ to test knowledge)
https://www.youtube.com/@utilsec
Additional Free Courses by Mike Holcomb:
You Should Know:
Essential OT/ICS Cybersecurity Commands & Tools
1. Network Scanning & Asset Discovery
Nmap for ICS device discovery nmap -sT -Pn -p 502,102,44818,1911 --script modbus-discover.nse <OT_Network_IP_Range> Shodan for exposed ICS devices shodan search "port:502 Modbus"
2. Protocol Analysis (Modbus, DNP3, S7)
Using Wireshark filters for ICS traffic
wireshark -Y "modbus || dnp3 || s7comm" -k -i eth0
Python script to read Modbus registers
from pymodbus.client import ModbusTcpClient
client = ModbusTcpClient('192.168.1.100')
client.connect()
response = client.read_holding_registers(0, 10)
print(response.registers)
3. Vulnerability Scanning in OT Networks
Using Metasploit for ICS exploits msfconsole use auxiliary/scanner/scada/modbusdetect set RHOSTS 192.168.1.0/24 run Nessus scan for OT vulnerabilities nessuscli scan --target 192.168.1.1-254 --policy "ICS Security Audit"
4. Secure ICS Network Segmentation
Linux iptables rules for OT traffic control iptables -A INPUT -p tcp --dport 502 -j DROP Block Modbus TCP iptables -A INPUT -s 10.0.0.0/24 -p tcp --dport 44818 -j ACCEPT Allow CIP traffic
5. Incident Response in OT Environments
Windows command to check for suspicious processes
Get-Process | Where-Object { $_.CPU -gt 90 } | Format-Table -AutoSize
Log analysis for ICS attacks
grep -i "unauthorized access" /var/log/ics-firewall.log
What Undercode Say:
OT/ICS cybersecurity is critical for industrial safety. This course provides hands-on knowledge for securing power plants, factories, and critical infrastructure. Use network segmentation, protocol analysis, and vulnerability scanning to defend against attacks.
🔗 Practice these commands in a lab environment before real-world use.
Prediction:
As OT/ICS attacks rise, demand for skilled professionals will grow. Expect more free training like this to bridge the skills gap.
Expected Output:
A structured guide with actionable commands, course links, and best practices for OT/ICS cybersecurity.
References:
Reported By: Https: – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
