This topic describes how to configure a security group for an ApsaraDB RDS for MySQL instance. The RDS security group can be associated with an Elastic Compute Service (ECS) security group to allow all ECS instances in the ECS security group to access the RDS instance.
Scenarios
After your RDS instance is created, you must configure IP address whitelists or security groups for the instance. Otherwise, your RDS instance is inaccessible. For more information about how to configure an IP address whitelist, see Configure an IP address whitelist for an ApsaraDB RDS for PostgreSQL instance.
For more information about security groups, see Create a security group.
Precautions
You can configure both IP address whitelists and security groups. All the IP addresses in the configured IP address whitelists and all the ECS instances in the configured security groups are granted access to your RDS instance.
A maximum of 10 security groups can be configured for each RDS instance.
After the ECS instances in a configured security group are updated, the updates are automatically synchronized to the configured security group.
You can configure only a security group that has the same network type as your RDS instance. In this case, the network types of your RDS instance and the security group that you want to configure must both be VPC or classic network.
After you change the network type of your RDS instance, the security groups that you configured become invalid. You must configure the security groups of the specified network type again.
Procedure
- 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 Whitelist and SecGroup. On the page that appears, click the Security Group tab.
- Click Add Security Group. Note Security groups followed by a VPC tag contain ECS instances that reside in virtual private clouds (VPCs).
- Select the security group that you want to add, and then click OK.
What to do next
Related operations
| Operation | Description |
| DescribeSecurityGroupConfiguration | Queries details about the ECS security groups that are associated with an instance. |
| ModifySecurityGroupConfiguration | Modifies details about the ECS security groups that are associated with an instance. |