This topic describes the issues related to connections to Lindorm and relevant solutions.

If you want to connect to the private endpoint of a Lindorm instance from an Elastic Compute Service (ECS) instance, make sure that the ECS instance and the Lindorm instance can communicate with each other. If the instances cannot communicate with each other, check the possible causes. The following table describes the possible causes and relevant solutions.
Cause Solution
The whitelist of the Lindorm instance does not contain the private IP address of the ECS instance. Add the private IP address of the ECS instance to the whitelist of the Lindorm instance. For more information, see Configure a whitelist.
The security group rules that are configured for the ECS instance block access requests that are directed to the private endpoint of the Lindorm instance. Create a security group rule that allows the ECS instance to connect to the Lindorm instance. For more information, see Add a security group rule.
The network types of the ECS instance and the Lindorm instance are different. The network types are different in the following scenarios:
  • The ECS instance is deployed in the classic network and the Lindorm instance is deployed in a VPC. In this case, the ECS instance cannot connect to the Lindorm instance.
  • The two instances are connected to different vSwitches in the same VPC. In this case, add a security group rule and configure a network access control list (ACL). For more information, see Add a security group rule and Add rules to the network ACL.
  • The two instances are connected to different VPCs. In this case, the two instances cannot communicate with each other by default. Use Express Connect to connect the instances. For more information, see How do I choose a proper VPC solution.
  • The network over which you connect the ECS instance to the Lindorm instance is not deployed on Alibaba Cloud. For example, you want to connect the ECS instance to the Lindorm instance over the internal network of your enterprise. In this case, enable Internet access for your Lindorm instance or use an Express Connect circuit to connect to the Lindorm instance.

If the issue persists, submit a ticket to contact technical support.