How Can I Protect My PLCs from Cyber Attacks?
Cyber threats targeting industrial systems are increasing, especially for internet-connected devices like PLCs. Taking a few simple steps can go a long way in protecting your equipment and operations.
1. Make Sure Controllers Are Not Exposed to the Public Internet
- Do not connect PLCs directly to the internet
- Use a firewall or secure network
- For remote access, use a VPN instead of open access
2. Enable Security Protections on Controllers
Many controllers from Rockwell Automation include built-in security.
- Enable user authentication
- Set strong passwords
- Use available controller security settings
👉 You can learn more in the System Security Design Guidelines:
View System Security Design Guidelines
3. Limit Who Has Access
- Only allow access to people who need it
- Remove old or unused users
- Use role-based access when possible
4. Keep Systems Updated
- Install firmware and software updates
- Stay informed on vendor security advisories
- Regular updates help fix vulnerabilities
5. Use a Layered Security Approach
Don’t rely on just one method—combine:
- Firewalls
- Secure remote access
- Network segmentation
- Monitoring tools
View Industrial Network Design Guides
Learn more at the Rockwell Automation Trust Center
Need More Help?
If you have questions or want help securing your system, reach out to the ES&E team.
You can also explore our cybersecurity videos for additional tips and best practices.