🛡️ AWS CloudTrail Network Gateways Changes Monitoring is not enabled🟢⚪
- Contextual name: 🛡️ Network Gateways Changes Monitoring is not enabled🟢⚪
- ID:
/ce/ca/aws/cloudtrail/network-gateways-changes-monitoring - Tags:
- Policy Type:
COMPLIANCE_POLICY - Policy Categories:
SECURITY
Similar Policies
- Cloud Conformity: Internet Gateway Changes Alarm
- Internal:
dec-x-e9ae2d3d
Similar Internal Rules
| Rule | Policies | Flags |
|---|---|---|
| ✉️ dec-x-e9ae2d3d | 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.
Network gateways are required to send and receive traffic to a destination outside of a VPC. It is recommended that a metric filter and alarm be established for changes to network gateways.
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 network gateways will help ensure that all ingress/egress traffic traverses the VPC border via a controlled path.
Impact
Monitoring changes to network gateways helps detect unauthorized modifications that could compromise network security. Implementing automated monitoring and alerts can improve incident response times, but it may require additional configuration and
... see more
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 network gateways 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 <network_gw_changes_metric> --metric-transformations metricName=<network_gw_changes_metric>, metricNamespace='CISBenchmark',metricValue=1 --filter-pattern '{ ($.eventName = CreateCustomerGateway) || ($.eventName = DeleteCustomerGateway) || ($.eventName = AttachInternetGateway) || ($.eventName = CreateInternetGateway) || ($.eventName = DeleteInternetGateway) || ($.eventName = DetachInternetGateway) }'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:
aws sns create-topic --name <sns_topic_name>
... [see more](remediation.md)