If you want to customize the domain name of the server to which Alibaba Cloud CDN initiates back-to-origin requests, you must first configure the domain type of the origin host. The origin host supports the following domain name types: accelerated domain name, origin domain name, and custom domain name.

Background information

An origin host is the domain name of the origin server to which Alibaba Cloud CDN initiates back-to-origin requests. If the origin server is shared by multiple content delivery services, each back-to-origin request can include a different origin host to specify the required content delivery service.

Note If the origin server is associated with multiple domain names or sites, you must specify a custom domain name to which the back-to-origin requests are sent. Otherwise, the back-to-origin process fails.
Differences between an origin server and an origin host:
  • An origin server defines a specific IP address to which back-to-origin requests are redirected.
  • An origin host defines a specific site that is hosted on a specific IP address. Back-to-origin requests are redirected to the IP address.

Procedure

  1. Log on to the Alibaba Cloud CDN console.
  2. In the left-side navigation pane, click Domain Names.
  3. On the Domain Names page, find the domain name that you want to manage and click Manage in the Actions column of the domain name.
  4. In the management pane of the domain name, click Back-to-origin.
  5. In the Origin Host section, click Modify.
  6. Turn on Origin Host and set Domain Type.
    Back-to-origin configuration
    Parameter Description
    CDN Domain This option specifies an accelerated domain name. Clients access this domain name to accelerate content delivery by using Alibaba Cloud CDN. For example, cdntest.com can be specified. If you set Domain Type to CDN Domain, an accelerated domain name is specified as the origin host, for example, cdntest.com.
    Origin Domain This option specifies the domain name of an origin server. To retrieve content from the origin server, Alibaba Cloud CDN must access this domain name. For example, origin.com can be specified. If you set Domain Type to Origin Domain, the domain name of an origin server is specified as the origin host, for example, origin.com.
    Custom Domain If you set Domain Type to Custom Domain, a custom domain name is specified as the origin host. If the origin server is associated with multiple domain names, you must specify a domain name to which the back-to-origin requests are sent. Otherwise, the back-to-origin process fails.
    Example Origin information Feature status Domain name Description
    Example 1 Domain name By default, the Origin Host feature is disabled. Accelerated domain name:

    cdntest.com

    Address of the origin server:

    origin.com
    • If you set Domain Type to CDN Domain, the origin host is set to cdntest.com.
    • If you set Domain Type to Origin Domain, the origin host is set to origin.com.
    • If you set Domain Type to Custom Domain, the origin host is set to the specified custom domain name.
    Example 2 IP address By default, the Origin Host feature is disabled. Accelerated domain name:

    cdntest.com

    Address of the origin server:

    1.1.1.1
    • If you set Domain Type to CDN Domain, the origin host is set to cdntest.com.
    • If you set Domain Type to Custom Domain, the origin host is set to the specified custom domain name.
    Note The address of the origin server is an IP address. Therefore, the Origin Domain option is unavailable for the Domain Type parameter.
    Example 3 OSS bucket domain name By default, the Origin Host feature is enabled. Accelerated domain name:

    cdntest.com

    Address of the origin server:

    test.oss-cn-hangzhou.aliyuncs.com
    • If you set Domain Type to CDN Domain, the origin host is set to cdntest.com.
    • If you set Domain Type to Origin Domain, the origin host is set to test.oss-cn-hangzhou.aliyuncs.com.
    • If you set Domain Type to Custom Domain, the origin host is set to the specified custom domain name.
    Note Default settings:

    Domain Type: Origin Domain

    Address of the origin server: test.oss-cn-hangzhou.aliyuncs.com
  7. Click OK.