By default, network access to MySQL Cloud Service is provided by using SSH. The SSH connection uses the SSH key specified during the process to create a database deployment. By default, port 22 is used for SSH connections. To access other ports you must perform additional configuration tasks, such as creating an SSH tunnel or enabling access to the port.
When you create an MySQL Cloud Service database deployment in Oracle Cloud Infrastructure, network access to the deployment is provided and managed by the Oracle Cloud Infrastructure network components according to rules specified when you followed the instructions in Prerequisites for Oracle Platform Services on Oracle Cloud Infrastructure in the Oracle Cloud Infrastructure documentation.
When you create an MySQL Cloud Service database deployment in Oracle Cloud Infrastructure Classic, network access to the deployment is provided and managed using access rules in the MySQL Cloud Service console. With the exception of SSH access on port 22, the access rules created for a database deployment are disabled to ensure the deployment is secure by default. To open access to applications and management tools, you need to enable one of these access rules or create a custom access rule of your own.