Prefix Lists: AWSprefix listsare a simple way to manage IP address ranges that can be reused across security groups, route tables, and firewall rules. By creating a prefix list for each application, you can group the IP addresses of the EC2 instances that host a specific application.

Dynamic Updates with Minimal Effort: When EC2 instances are launched or terminated in Auto Scaling groups, the IP ranges can be dynamically updated in the prefix lists. This approach avoids manual updates to the stateful rule group while ensuring that the rule group remains up-to-date.

Low Administrative Overhead: Referencing the prefix lists in the stateful rule group minimizes the administrative effort, as any changes to the prefix lists automatically reflect in the firewall rules without needing direct modifications to the rule group.