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CloudWatch.11
Ensure a log metric filter and alarm exist for changes to Network Access Control Lists (NACL)
Severity
Cloud Platforms
Resources
Related Standards
Automated
LOW
AWS
Amazon CloudWatch
AWS CIS Foundations v1.2 & v1.4, AWS Well-Architected, CDR, ISO27001, SOC2, NIST CSF,
YES
Real-time monitoring of API calls can be achieved by directing CloudTrail Logs to CloudWatch Logs and establishing corresponding metric filters and alarms. NACLs are used as a stateless packet filter to control ingress and egress traffic for subnets within a VPC. It is recommended that a metric filter and alarm be established for changes made to NACLs.
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