📝 AWS CloudTrail Route Table Changes Monitoring is not enabled 🟢
- Contextual name: 📝 Route Table Changes Monitoring is not enabled 🟢
- ID:
/ce/ca/aws/cloudtrail/route-table-changes-monitoring - Located in: 📁 AWS CloudTrail
Flags
Our Metadata
- Policy Type:
COMPLIANCE_POLICY - Policy Category:
SECURITY
Similar Policies
- Cloud Conformity
- Internal
dec-x-0ef94ece
Similar Internal Rules
| Rule | Policies | Flags |
|---|---|---|
| ✉️ dec-x-0ef94ece | 1 |
Description
Description
Real-time monitoring of API calls can be achieved by directing CloudTrail Logs to CloudWatch Logs or an external Security Information and Event Management (SIEM) environment, and establishing corresponding metric filters and alarms.
Routing tables are used to route network traffic between subnets and to network gateways.
It is recommended that a metric filter and alarm be established for changes to route tables.
Rationale
CloudWatch is an AWS native service that allows you to observe and monitor resources and applications. CloudTrail Logs can also be sent to an external Security information and event management (SIEM) environment for monitoring and alerting.
Monitoring changes to route tables will help ensure that all VPC traffic flows through an expected path and prevent any accidental or intentional modifications that may lead to uncontrolled network traffic. An alarm should be triggered every time an AWS API call is performed to create, replace, delete, or disassociate a Route Table.
Audit
If you are using CloudTrails and CloudWatch, perform the following to ensure that there is at least one active multi-region CloudTrail with prescribed metric filters and alarms configured:
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Remediation
Remediation
If you are using CloudTrails and CloudWatch, perform the following to setup the metric filter, alarm, SNS topic, and subscription:
- Create a metric filter based on filter pattern provided which checks for route table changes and the
<cloudtrail_log_group_name>taken from audit step 1:aws logs put-metric-filter --log-group-name <cloudtrail_log_group_name> --filter-name <route_table_changes_metric> --metric-transformations metricName=<route_table_changes_metric>, metricNamespace='CISBenchmark',metricValue=1 --filter-pattern '{ ($.eventName = CreateRoute) || ($.eventName = CreateRouteTable) || ($.eventName = ReplaceRoute) || ($.eventName = ReplaceRouteTableAssociation) || ($.eventName = DeleteRouteTable) || ($.eventName = DeleteRoute) || ($.eventName = DisassociateRouteTable) }'Note: You can choose your own metricName and metricNamespace strings. Using the same metricNamespace for all Foundations Benchmark metrics will group them together.
- Create an SNS topic that the alarm will notify:
... see more