Help Center/ TaurusDB/ FAQs/ Database Connections/ What Should I Do If an ECS Cannot Connect to a TaurusDB Instance?
Updated on 2025-07-22 GMT+08:00

What Should I Do If an ECS Cannot Connect to a TaurusDB Instance?

Perform the following steps to identify the problem:

  1. Check whether the ECS and TaurusDB instance are located in the same VPC.

    • If they are in the same VPC, go to 2.
    • If they are in different VPCs, create an ECS in the VPC where the instance is located.

  2. Check whether a security group has been created for the ECS.

    • If a security group has been created, check whether its rules are appropriate.
    • If no security group has been created, go to the VPC console from the ECS details page and create a security group.

  3. Check whether the ECS can connect to the instance over the instance port.

    The default port of a cluster TaurusDB instance is 3306.

    telnet <IP address> {Port number}
    • If the ECS can connect to the instance, no further action is required.
    • If the ECS still cannot connect to the instance port, contact technical support.