How Do I Select and Configure a Security Group?

Intra-VPC Access to DDM Instances

Access to a DDM instance includes access to the DDM instance from the ECS where a client is located and access to its associated data nodes.

The ECS, DDM instance, and data nodes must be in the same VPC. In addition, correct rules should be configured for their security groups to allow network access.

1. Using the same security group is recommended for the ECS, DDM instance, and data nodes. After a security group is created, network access in the group is not restricted by default.
2. If different security groups are configured, you may need to refer to the following configurations:
   

   • Assume that the ECS, DDM instance, and RDS for MySQL instance are configured with security groups sg-ECS, sg-DDM, and sg-RDS, respectively.
   • Assume that the service port of the DDM instance is 5066 and that of the RDS for MySQL instance is 3306.
   • The remote end should be a security group or an IP address.

   Add the rules described in the following figure to the security group of the ECS to ensure that your client can access the DDM instance.

   Figure 1 ECS security group rules
   

   Add the rules shown in the following figure to the security group of the ECS where your DDM instance is located so that your DDM instance can access associated data nodes and can be accessed by your client.

   Figure 2 Configuring security group inbound rules for your DDM instance
   
   Figure 3 Configuring security group outbound rules for your DDM instance
   

   Add the rules shown in the following figure to the security group of the ECS where the data node is located so that your DDM instance can access the node.

   Figure 4 Configuring security group inbound rules for the associated RDS instance
   
   Figure 5 Configuring security group outbound rules for the associated RDS instance