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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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