ApsaraDB RDS provides an internal endpoint that you can use to connect to your ApsaraDB RDS for PostgreSQL instance from an Alibaba Cloud instance such as an Elastic Compute Service (ECS) instance within the same virtual private cloud (VPC) as the RDS instance. If your application is deployed on an Alibaba Cloud instance that resides in a different VPC from the RDS instance or an on-premise device, you must apply for a public endpoint and use the public endpoint to connect the application to your RDS instance.
Internal and public endpoints
Endpoint type | Description |
Internal endpoint |
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Public endpoint |
Important
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Apply for or release a public endpoint
- Go to the Instances page. In the top navigation bar, select the region in which the RDS instance resides. Then, find the RDS instance and click the ID of the instance.
In the left-side navigation pane, click Database Connection.
Apply for or release a public endpoint.
If you have not applied for a public endpoint, you can click Apply for Public Endpoint.
If you have applied for a public endpoint, click Release Internet Address.
WarningWhen you apply for a public endpoint, Add 0.0.0.0/0 to the whitelist is selected by default. The 0.0.0.0/0 CIDR block indicates that all IP addresses are allowed to access your RDS instance. We recommend that you add this CIDR block only for a connectivity test. When you run online workloads, do not add this CIDR block to an IP address whitelist.
In the message that appears, click OK.
ImportantAfter the public endpoint is released, clients cannot connect to the RDS instance by using the released public endpoint.
References
After you apply for a public endpoint, you must add the public IP address of the device on which the client or application resides to an IP address whitelist of your RDS instance. This way, you can connect to the RDS instance over the Internet. For more information, see Configure an IP address whitelist.
You can connect to an RDS instance by using the SQL Server Management Studio (SSMS) client or Data Management (DMS) that is provided by Alibaba Cloud. For more information, see Connect to an ApsaraDB RDS for SQL Server instance.
You can also call operations to apply for or release a public endpoint.