What Is the Black Hole Policy of HUAWEI CLOUD?

What is a black hole?

A black hole refers to a situation where access to a cloud server is blocked by HUAWEI CLOUD Anti-DDoS because the traffic targeting the cloud server exceeds the configured black hole threshold.

Why is a black hole required for HUAWEI CLOUD Anti-DDoS?

DDoS attacks impose adverse impacts on users' services and HUAWEI CLOUD. Defense against DDoS attacks is costly on bandwidth consumption.

The bandwidth is purchased by HUAWEI CLOUD from carriers, but carriers will not take the attack traffic out when calculating the total bandwidth fees.

Therefore, the access to a cloud server is blocked by HUAWEI CLOUD Anti-DDoS when the traffic targeting the cloud server exceeds the configured black hole threshold.

What is the black hole rule?

A black hole will be triggered when the traffic targeting the cloud server exceeds the configured black hole threshold.

The black hole lasts 24 hours by default. If the system detects that the traffic still persists and exceeds the threshold, the access will be blocked again.