Information flow policies regarding dynamic information flow control include, for example, allowing or disallowing information flows based on changes to the Ports, Protocols, Services Management (PPSM) Category Assurance Levels (CAL) list, vulnerability assessments, or mission conditions. Changing conditions include changes in the threat environment and detection of potentially harmful or adverse events. This requirement also applies to Zero Trust initiatives.
Verify the firewall immediately uses updates made to policy enforcement mechanisms such as firewall rules, security policies, and security zones. For example, there is no need to reinitialize or reboot or the action to commit the changes is prompted. If the firewall does not immediately use updates made to policy enforcement mechanisms such as firewall rules, security policies, and security zones, this is a finding.
Require system administrators to commit and test changes upon configuration of the firewall.