Connecting a Database

Private network connection (recommended)

Private IP address

DDS provides a private IP address by default.

• If your applications are deployed on ECS and located in the same region, AZ, and VPC subnet as the DB instance, you are advised to use a private IP address to connect to the DB instance.
• By default, a DDS instance is not accessible from an ECS in a different security group. Add an inbound rule to the DDS security group to allow access of the ECS.
• The default DDS port is 8635. You can change it if you want to access DDS through another port.

Secure and excellent performance

Public network connection

EIP

• If your applications are running on an ECS that is in a different region from the one where the DDS instance is located, use an EIP to connect the ECS to your DDS instances.
• If your applications are deployed on other cloud platforms, EIP is recommended.

Low security

Application connection

Private IP address

Connect to the database using different applications.

• Connecting to the Database Using Java
• Connecting to the Database Using Python