It is recommended to use custom master user names for your Redshift database clusters instead of the default master user name ("awsuser") to enhance the security of your clusters against non-targeted attacks. Changing the default master user name is a basic security measure that can improve the overall security, but it does not provide complete protection against attackers who can guess or obtain the user names through social engineering. For advanced Redshift database security, it is recommended to restrict the root account to privileged users, use strong and complex passwords, and grant permissions to trusted users only at the database level. The default master user name ("awsuser") used to access your Redshift database clusters can pose a security risk. Changing the master user name to a custom one will add an extra layer of security and protect your publicly accessible Amazon Redshift clusters from potential hacking attempts.
To remediate this issue and ensure Redshift clusters are using a custom master user name instead of the default master user name, follow these steps:
By following these steps, you will have successfully changed the default master user name to a custom name, adding an extra layer of security to your Redshift clusters.