Manual:$wgUseCdn

Enable/disable page view caching. Cdn configuration causes the following changes in behaviour:

• The Cache-Control header is changed to allow the cache proxy to blindly cache content for a predetermined period of time (configured by $wgCdnMaxAge ).
• The Last-Modified header is artificially shortened to ensure the cache proxy will not renew outdated HTML beyond a certain age. The Last-Modified date will never be older than $wgCdnMaxAge . This will allow to refresh the cached copy in case there were changes to footer icons, sidebar, skin update, and other configuration or skin-level changes not tracked by the wiki page itself.
• Purges are sent to ensure content edited by users remains up to date immediately.
• Will disable the Debugging toolbar when set to true.

The list of Cdn servers to be purged on update must be stored in $wgCdnServers .

• MediaWiki configuration settings
• MediaWiki configuration settings introduced in version 1.34.0
• MediaWiki configuration settings still in use
• Squid variables