A developer creates a MySQL database service on a Linux ECS instance (ECS-A), and wants...

Alibaba Cloud ACA-Developer Question Answer

A developer creates a MySQL database service on a Linux ECS instance (ECS-A), and wants to access this database service from another instance (ECS-B) in the same VPC using the private IP address bound to the ECS instance, however, the connection can't be established. What could cause this? (Number of correct answers: 2)

The security group for ECS-A does not have the default MySQL service port open.

The built-in firewall on ECS-A has rules that prohibit external access to the MySQL service port.

No Internet IP address is configured for ECS-A.

The bind-address parameter set in the my.ini configuration file of the MySQL service is commented out.

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Update on: Jul 30, 2025
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A developer creates a MySQL database service on a Linux ECS instance (ECS-A), and wants...

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