Alibaba Cloud DNS:DNS resolution lines

Priority of different categories of DNS request sources (resolution lines)

When multiple records for different resolve request sources are set for the same domain name, the following logic is applied to determine which record prevails:

• Priority of different categories of DNS resolution lines: Custom line > Search engine > Cloud service provider > ISP > Regional lines > Default. Priority of different categories of DNS request sources (resolution line)

• In each category, the more subdivided the lines, the higher the priority.

Examples of priority rules

The following examples illustrate scenarios where the request source is located outside and in the Chinese mainland:

Lines for regions in the Chinese Mainland

Lines for regions outside the Chinese mainland

DNS resolution lines

Subdivided lines

• ISP lines

• Lines for regions in the Chinese mainland

• Lines for regions outside the Chinese mainland

• Search engine lines

• Lines for cloud service provider