10.6.1 Review the following at least daily:
• All security events
• Logs of all system components that store, process, or transmit CHD and/or SAD
• Logs of all critical system components
• Logs of all servers and system components that perform security functions (for example, firewalls, intrusion-detection systems/intrusion-prevention systems (IDS/IPS), authentication servers, e-commerce redirection servers, etc.).
10.6.1.a Examine security policies and procedures to verify that procedures are defined for reviewing the following at least daily, either manually or via log tools:
• All security events
• Logs of all system components that store, process, or transmit CHD and/or SAD
• Logs of all critical system components
• Logs of all servers and system components that perform security functions (for example, firewalls, intrusion-detection systems/intrusion-prevention systems (IDS/IPS), authentication servers, e-commerce redirection servers, etc.)
10.6.1.b Observe processes and interview personnel to verify that the following are reviewed at least daily:
• All security events
• Logs of all system components that store, process, or transmit CHD and/or SAD
• Logs of all critical system components
• Logs of all servers and system components that perform security functions (for example, firewalls, intrusion-detection systems/intrusion-prevention systems (IDS/IPS), authentication servers, e-commerce redirection servers, etc.).
Checking logs daily minimizes the amount of time and exposure of a potential breach.
Daily review of security events—for example, notifications or alerts that identify suspicious or anomalous activities—as well as logs from critical system components, and logs from systems that perform security functions, such as firewalls, IDS/IPS, file-integrity monitoring (FIM) systems, etc. is necessary to identify potential issues. Note that the determination of “security event” will vary for each organization and may include consideration for the type of technology, location, and function of the device. Organizations may also wish to maintain a baseline of “normal” traffic to help identify anomalous behavior.