When creating a migration, sync, or subscription task, you need to select different access types based on the deployment conditions of your source database. This document describes how to select an access type and prepare accordingly.
|Use Case||Access Type||Directions|
|The source database can be accessed through a public IP||Public Network||Add the SNAT IP of the DTS server to the allowlist (generally the firewall) of the self-built database to connect the source database and DTS migration instance.|
|The database is in a self-built IDC, which is interconnected with a VPC through VPN or Direct Connect||Direct Connect/VPN Access|
|The source database is deployed in a CVM instance||Self-Build on CVM||In this scenario, DTS will automatically add the SNAT IP address of the DTS server to a security group rule of the CVM instance, so you don't need to manually add it.|
|The source and target databases are both deployed in Tencent Cloud VPCs.||VPC||Add the SNAT IP address of the DTS server to a security group rule of the source database.|
The data sync feature supports the VPC access type. To use it, submit a ticket for application.
|The source database is a TencentDB database||Database||Add the SNAT IP address of the DTS server to a security group rule of the source database.|
For a third-party cloud database, you can select Public Network generally as the access type or select VPC Access, Direct Connect, or CCN based on your actual network conditions.