Symptoms

How can I protect domain names accelerated by Alibaba Cloud Content Delivery Network (CDN) against Distributed Denial of Service (DDoS) or HTTP flood attacks?

Causes

When a domain name accelerated by Alibaba Cloud CDN is under DDoS or HTTP flood attack, Alibaba Cloud CDN automatically adds the CDN domain to a sandbox. In the sandbox, the domain name can use CDN acceleration services, but the service performance is not guaranteed. For more information about sandboxes, see Sandbox description.

If your domain name is vulnerable to DDoS or HTTP flood attacks, we recommend that you use Secure Content Delivery Network (SCDN).
Note SCND is available only in mainland China.