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**Topics**
+ [Create an approval process for firewall requests during a rehost migration to AWS](create-an-approval-process-for-firewall-requests-during-a-rehost-migration-to-aws.md)
+ [Encrypt an existing Amazon RDS for PostgreSQL DB instance](encrypt-an-existing-amazon-rds-for-postgresql-db-instance.md)
+ [Estimate storage costs for an Amazon DynamoDB table](estimate-storage-costs-for-an-amazon-dynamodb-table.md)
+ [Implement cross-Region disaster recovery with AWS DMS and Amazon Aurora](implement-cross-region-disaster-recovery-with-aws-dms-and-amazon-aurora.md)