Assume that a client requests resources that are not cached on a Content Delivery
Network (CDN) node. The node retrieves these resources from the origin server based
on the origin protocol policy and caches these resources on the node. If the client
sends an HTTP request to retrieve resources that are not cached on a CDN node, the
node retrieves the requested resources from the origin server over HTTP. If the client
sends an HTTPS request, the CDN node also retrieves the requested resources from the
origin server over HTTPS.
Note The origin must support port 80 and port 443. Otherwise, the back-to-origin process
may fail.
- Log on to the ApsaraVideo VOD console.
- In the left-side navigation pane, click Configuration Management.
- Choose .
- On the Domain Names page, select the domain name that you want to configure, and click
Configure in the Actions column.
- In the left-side navigation pane of the domain name details page, click Back-to-Origin. In the Use Request Protocol for Back-to-Source section, turn on the Use Request Protocol for Back-to-Source switch.
Note The Use Request Protocol for Back-to-Source switch takes effect on dynamic and static resources. Alibaba Cloud CDN communicates
with the origin server by using the specified dynamic origin protocol policy when
Alibaba Cloud CDN requests dynamic resources.