What Are the Differences Between Floating and Private IP Addresses of RDS for MariaDB Instances?

Updated on 2025-06-24 GMT+08:00

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Definitions of the Floating IP Address and Private IP Address

After an RDS for MariaDB instance is created, the system assigns the instance a floating IP address, which is used by external systems to connect to the instance over a private network.

The system also assigns a private IP address to each database node for internal network communication (two private IP addresses for a primary/standby instance, one for a single-node instance, and one for a read replica). Private IP addresses cannot be accessed by external systems.

For more information, see What Are the Differences Between EIPs, Private IP Addresses, and Virtual IP Addresses?

Querying the Floating and Private IP Addresses of an RDS for MariaDB Instance

Floating IP address
On the RDS console, click the name of a DB instance to go to the Overview page. In the navigation pane on the left, choose Connectivity & Security to check the floating IP address of the instance.

Figure 1 Floating IP address
Private IP address
Log in to the management console and choose Networking > Virtual Private Cloud. In the navigation pane on the left, choose Network Interfaces to check the private IP addresses of the RDS instance.

Figure 2 Checking the private IP addresses