Rewrites all links for assets to use a cdn instead. It's not responsible to upload or sync the files anywhere. Some CDNs can do this for you.
Download and install manually or use composer.
You have to enable this filter manually using
CDNRewriteRequestFilter.cdn_rewrite config var.
CDNRewriteRequestFilter.cdn_domain with protocol and host.
Your config.yml might look like:
CDNRewriteRequestFilter: cdn_rewrite: true #global switch cdn_domain: 'http://cdn.mydomain.com' rewrite_assets: true #rewrite stuff in assets rewrite_themes: false #do not rewrite stuff in themes folder