Ensure a log metric filter and alarm exist for route table changes

Property	Value
Language
Severity
Service	cloudwatch
Provider	AWS

Description

You can do real-time monitoring of API calls by directing CloudTrail logs to CloudWatch Logs and establishing corresponding metric filters and alarms.
Routing tables route network traffic between subnets and to network gateways.

CIS recommends that you create a metric filter and alarm for changes to route tables. Monitoring these changes helps ensure that all VPC traffic flows through an expected path.

Resolution

Create an alarm to alert on route table changes