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Confirm Amazon RDS database instances are not using default ports. This includes default ports such as MySQL/Aurora port 3306, SQL Server port 1433, and PostgreSQL port 5432.
Using a custom port can protect against potential brute-force and dictionary attacks.
Follow the Modifying an Amazon RDS instance docs to verify you’re not using a default. You can modify your port by modifying that DB instance settings.
Run create-db-snapshot
with your database instance and snapshot identifiers to create a snapshot.
create-db-snapshot.sh
aws rds create-db-snapshot \
--db-instance-identifier database-mysql \
--db-snapshot-identifier snapshotidentifier
Run modify-db-instance
with a new, valid port number. A list of port numbers are available.
modify-db-instance.sh
aws rds modify-db-instance \
--db-instance-identifier database-identifier \
--option-group-name test-group-name \
--db-parameter-group-name test-sqlserver-name \
--apply-immediately