Ensure that your Amazon RDS databases instances are not using their default endpoint ports (i.e. MySQL/Aurora port 3306, SQL Server port 1433, PostgreSQL port 5432, etc) in order to promote port obfuscation as an additional layer of defense against non-targeted attacks.
Running your database instances on default ports represent a potential security concern. Moving RDS instances ports (the ports on which the database accepts connections) to non-default ports will add an extra layer of security, protecting your publicly accessible AWS RDS databases from brute force and dictionary attacks.
The following table lists the endpoint default port for each AWS RDS database engine available:
|Database Engine||Default Port Number|
To change the default port number for your existing RDS database instances, perform the following steps: