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Locating control system networks and devices behind firewalls is an effective countermeasure for securing the Internet of Things (IoT) network against cyberattacks. Firewalls serve as a barrier between the internal network and potential external threats, filtering incoming and outgoing traffic based on predetermined security rules. This means that unauthorized traffic attempting to access sensitive devices is blocked, thereby reducing the chances of exploitation.

By placing IoT devices behind firewalls, organizations can enforce stricter access controls and monitor network activity more effectively. When combined with proper configurations and policies, firewalls can help prevent unauthorized access and mitigate the risk of various cyber threats such as hacking attempts and data breaches.

Other approaches, such as skipping security assessments, using outdated software, or choosing not to monitor network traffic, undermine the security posture of an IoT network. All these practices expose systems to vulnerabilities, making them more susceptible to cyberattacks. Thus, using firewalls is an essential strategy in safeguarding IoT environments.