Severity: High
Description: This controls ensures default route table association is disabled for Transit Gateways. A transit gateway scales elastically based on the volume of network traffic. Default route table association, automatically associate attachments with the default route table.
Remediation Steps:
Perform following to modify VPC Transit Gateway route:
Login to the AWS Management Console at https://console.aws.amazon.com.
Navigate to VPC console.
In the left pane, click on Transit Gateway.
Select the required Gateway, and click on Actions and select Modify.
Uncheck Default route table association.
Click on Modify Transit Gateway.
Important:
Reference: