Cause: After CDN is enabled for a private bucket, signature information is included by default for non-anonymous access when you retrieve an object from OSS by using CDN. However, to access the default homepage configured by using static website hosting, the request must be anonymous.

Solution: Use the CDN console to configure the rewrite rule. In the Create Rewrite Rule dialog box, set Original URI to ^/$, Final URI to /index.html, and Flag to Redirect. After the rule is configured, the CDN node returns 302 and when the client requests

For more information about how to configure URI rewrite rules, see Create a URI rewrite rule.