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Introduction:
Operational Technology (OT) and Industrial Control Systems (ICS) cybersecurity is a high-stakes field requiring specialized knowledge. Unlike traditional IT security, OT/ICS deals with critical infrastructure, making experience in engineering, automation, or IT cybersecurity essential. While breaking into the field isn’t easy, you can start building foundational knowledge now.
Learning Objectives:
- Understand why OT/ICS cybersecurity isn’t an entry-level field.
- Learn foundational skills to prepare for an OT/ICS security career.
- Access free resources to start your learning journey.
You Should Know:
1. Why OT/ICS Cybersecurity Requires Prior Experience
OT/ICS systems control power plants, manufacturing lines, and water treatment facilities. A single misconfiguration can cause catastrophic failures. Unlike IT systems, OT environments prioritize safety and uptime over patching.
Key Command (Windows – Detecting ICS Protocols):
Get-NetTCPConnection | Where-Object { $_.LocalPort -eq 502 } | Select-Object LocalAddress, LocalPort, RemoteAddress, RemotePort, State
What This Does:
This PowerShell command checks for Modbus TCP (port 502) traffic, a common ICS protocol. Unauthorized Modbus traffic could indicate a breach.
2. Foundational IT Security Skills for OT/ICS
Before securing OT systems, you need IT cybersecurity fundamentals.
Key Command (Linux – Network Monitoring):
sudo tcpdump -i eth0 'port 102' -w siemens_s7.pcap
What This Does:
Captures Siemens S7 industrial protocol traffic (port 102) for analysis.
3. Learning PLCs and SCADA Systems
Programmable Logic Controllers (PLCs) and SCADA systems are core to OT.
Key Tool: Wireshark ICS Protocol Filter
scada || modbus || dnp3 || opcua || ethernet/ip
What This Does:
Filters Wireshark traffic to show only industrial protocols.
4. Free Training Resources for OT/ICS Security
Mike Holcomb’s free 25+ hour YouTube course is a great starting point:
🔗 Getting Started in ICS/OT Cyber Security
5. Understanding OT Network Segmentation
OT networks must be air-gapped or segmented from IT networks.
Key Command (Windows – Firewall Rule for OT Traffic):
New-NetFirewallRule -DisplayName "Block_OT_Unauthorized_Access" -Direction Inbound -LocalPort 502,102,20000 -Protocol TCP -Action Block
What This Does:
Blocks unauthorized access to common ICS ports.
- Practicing in a Safe OT Lab Environment
Use ICS-specific virtual labs like:
7. Moving Toward an OT Security Career
Gain experience in:
- IT cybersecurity (SOC, pentesting).
- Industrial automation (PLC programming).
- Networking (CCNA Industrial).
What Undercode Say:
- Key Takeaway 1: OT/ICS security isn’t entry-level—build IT or engineering experience first.
- Key Takeaway 2: Free resources (like Holcomb’s course) help bridge knowledge gaps.
Analysis:
The OT/ICS cybersecurity skills gap is widening as attacks on critical infrastructure rise. Professionals with hybrid IT/OT expertise will be in high demand. While breaking in takes time, starting with IT security and industrial protocols positions you for success.
Prediction:
As ransomware and state-sponsored attacks target OT systems, demand for skilled defenders will surge. Companies will prioritize cross-trained IT/OT security experts, making early skill-building a smart career move.
Ready to start?
🔗 Mike Holcomb’s Free OT/ICS Course
🔗 ICS Security Newsletter
🔗 More Free OT/ICS Videos
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Https: – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
