Function overview

Last Updated: Mar 30, 2018

Back-to-source settings

FunctionDescriptionDefault
Source host Specifies the host domain name that a CDN node will access in the back-to-source process. Three options are available: CDN domain, original site domain name, and custom domain name.CDN domain name
Back-to-source with the same protocolBack-to-source requests for resources use exactly the same protocol as used by the client to request the resources.Disabled

Cache settings

FunctionDescriptionDefault
Cache policy configuration Customizes cache expiration rules for specified resources. Disabled
Setting the HTTP Request Header Sets an HTTP request header. Eight parameters are currently available for HTTP request header customization. Disabled
Customizing the 404 page Customizes the 404 page. Three options are available: default 404 page, public welfare 404 page, and custom 404 page.Default 404 page

Access control

FunctionDescriptionDefault
Anti-leech Configures a referer blacklist or whitelist to identify and filter visitors.Disabled
URL authenticationUses URL authentication methods to protect resources on an origin site.Disabled
IP blacklistConfigures the access IP blacklist to identify and filter visitors.Disabled

Performance optimization

FunctionDescriptionDefault
Page optimization Compresses and removes useless blank lines and carriage return characters to effectively reduce the page size.Disabled
Smart compressionSupports smart compression for content in multiple formats to effectively reduce the size of user transmitted content.Disabled
Filter parameterRemoves parameters after ? in a URL request during the back-to-source process.Disabled
FunctionDescriptionDefault
Back-to-source of range Allows a user to notify an origin site server to return partial content within a specified range. This function helps with accelerated delivery of large files.Disabled
Drag/drop playbackEnables random drag or drop playback in a video or audio on-demand scenario.Disabled

Other settings

FunctionDescriptionDefault
Set httpDNSProvides a DNS service by using the HTTP protocol to directly access the server of Alibaba Cloud CDN.Disabled
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