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Anti-DDoS:Cloud service specifications and scrubbing thresholds

Last Updated:Feb 27, 2026

If network traffic to a cloud service's public IP address exceeds the configured scrubbing threshold, Anti-DDoS Basic automatically scrubs the traffic. This helps protect your business from DDoS attacks. This topic provides information about the specifications and scrubbing thresholds for different cloud services.

Scrubbing threshold reference documents

The maximum scrubbing threshold for a cloud service depends on its instance type. When you create or modify an Elastic Compute Service (ECS) instance, Server Load Balancer (SLB) instance, or NAT Gateway, the system automatically calculates the maximum scrubbing threshold based on the instance type.

Note

The system calculates blackhole filtering thresholds for instances of each cloud service based on the regions in which the instances reside and the bandwidth of the instances.

Cloud service

Reference document

Elastic Compute Service (ECS)

Anti-DDoS Basic for ECS

Server Load Balancer (SLB)

Anti-DDoS Basic for SLB

NAT Gateway

Anti-DDoS Basic for NAT Gateway

Elastic IP Address (EIP)

Anti-DDoS Basic for EIPs

Web Application Firewall (WAF)

Anti-DDoS Basic and black hole filtering for WAF

Global Accelerator (GA)

Anti-DDoS Basic for GA

References

For definitions of traffic scrubbing, blackhole filtering, and other basic concepts, see Terms.