Help Center/ Anti-DDoS/ FAQs/ About Threshold and Black Hole/ What Can I Do If an IP Address Is Blocked?
Updated on 2024-10-10 GMT+08:00
View PDF

What Can I Do If an IP Address Is Blocked?

Possible Causes

Anti-DDoS provides a maximum of 500 Mbit/s protection capacity free of charge (depending on the available bandwidth of Huawei Cloud).Anti-DDoS will trigger a black hole to block access from the Internet within a time period when detecting a cloud server is under volumetric flood attacks.

How Do I Deactivate a Black Hole?

When the access to a cloud server is blocked by Huawei Cloud because attack traffic targeting a cloud server exceeds a certain threshold, follow the instructions described in Table 1 to handle that.

Table 1 Black hole deactivation methods

Edition

Deactivation Policy

Deactivation Method

Anti-DDoS

NOTE:

Anti-DDoS is enabled by default.
  • The system automatically deactivates the black hole 24 hours after the access to a cloud server is blocked.
  • If the system detects that the attack has not stopped, and attack traffic is still exceeding the configured threshold, the access will be blocked again.

You need to wait until the system deactivates it automatically.