What is a good Firewall Policy?
OT (Operational Technology) firewall policies can vary depending on the specific needs and requirements of each organization, but there are some general guidelines that can help create a good OT firewall policy:
- Define your security objectives: Determine what security objectives you want to achieve with your firewall policy. This could include protecting critical infrastructure assets, preventing unauthorized access, and monitoring for anomalous behavior.
- Understand your network architecture: Before creating a firewall policy, you need to have a clear understanding of your network architecture, including the devices and systems that need to be protected, and the traffic flows that are permitted.
- Identify potential threats and vulnerabilities: Identify potential threats and vulnerabilities to your OT network, including known vulnerabilities in your OT devices, malware, and insider threats.
- Use a risk-based approach: Use a risk-based approach to determine which traffic to allow and which traffic to block. Consider the likelihood and potential impact of each threat, and prioritize security controls accordingly.
- Use segmentation: Segment your OT network into smaller zones to contain potential threats and limit the impact of a security incident.
- Follow the principle of least privilege: Limit access to your OT network to only those users and devices that require it to perform their duties.
- Monitor and update your policy: Regularly monitor and update your firewall policy to ensure it remains effective and up-to-date with the latest threats and vulnerabilities.
By following these guidelines, you can create a good OT firewall policy that helps protect your critical infrastructure assets and prevent cyber attacks.
– Reach out to one of our OT/ICS Specialists if you would like to hear more –
Securing the Connected World