Amazon Redshift now supports Canonical Name (CNAME) or custom domain name, an easy-to-read Domain Name System (DNS) record that routes SQL client connections to either the endpoint of your Amazon Redshift cluster or Amazon Redshift Serverless workgroup. With CNAME, you don’t need to expose your Redshift endpoint in the database connection, which enhances your security and it’s easier to recall and use.
Source:: Amazon AWS