This solution automatically deploys a single web access control list (web ACL) with a set of AWS WAF rules designed to filter common web-based attacks.
Set IP set block retention period using DynamoDB - ability to set a retention period on the IP address list within the IPSet Rules so that you can Allow, Block or Count IP addresses for a period of time. #159
Please up-vote if you want this feature. Do not submit a new feature request.