How to Start a Career in ICS/OT Cybersecurity?

Here is a high-level roadmap to begin your journey in ICS/OT Cybersecurity, along with free and high-quality resources:

Free Learning Resources:

1. Certified in Cybersecurity by ISC2 – https://lnkd.in/gMjjb7AH
2. Trainings by CISA VLP – https://lnkd.in/dA8nSGQT
3. YouTube Channel of Mike Holcomb – https://lnkd.in/dZhXbmnp
4. YouTube Channel of Manjunath Hiregange – https://lnkd.in/dSH6_gMB

5. Communities to Engage With:

• SANS ICS OT Security Professionals
• OT Security Huddle

6. ICS/OT Cybersecurity Jobs: Security Quarks

You Should Know:

1. Essential Linux Commands for ICS/OT Security

• Network Scanning:

  nmap -sV -O <target_IP>  Basic service and OS detection 
  nmap -p 1-1024 --script vuln <target_IP>  Vulnerability scanning 
  

• Packet Analysis:

  tcpdump -i eth0 -w ot_traffic.pcap  Capture ICS network traffic 
  wireshark ot_traffic.pcap  Analyze with Wireshark 
  

• Log Analysis:

  grep "authentication failed" /var/log/syslog  Check failed login attempts 
  journalctl -u ssh --since "1 hour ago"  Monitor SSH logs 
  

2. Windows Commands for OT Security

• Check Open Ports:

  netstat -ano | findstr LISTENING  List listening ports 
  

• Firewall Rules:

  netsh advfirewall show allprofiles  View firewall settings 
  

• Process Monitoring:

  Get-Process | Where-Object { $_.CPU -gt 50 }  Find high-CPU processes 
  

3. Practical Steps to Secure ICS/OT Systems

• Patch Management:

  sudo apt update && sudo apt upgrade -y  Linux updates 
  

• Disable Unnecessary Services:

  sudo systemctl disable telnet  Disable insecure protocols 
  

• Implement Network Segmentation:

  iptables -A INPUT -p tcp --dport 502 -j DROP  Block Modbus if unused 
  

What Undercode Say:

Breaking into ICS/OT cybersecurity requires hands-on practice with industrial protocols (Modbus, DNP3), network monitoring, and hardening systems. Use tools like Snort (IDS), Metasploit (pen-testing), and GRR (incident response). Always test in a lab before deploying in production.

Expected Output:

A structured learning path with practical commands and tools to secure Industrial Control Systems effectively.

(Note: Telegram/WhatsApp links and unrelated comments removed.)

References:

Reported By: Shamikkumar Icsot – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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