If DDoS attacks occur on an Alibaba Cloud asset that uses a public IP address and the volume of the DDoS attacks exceeds the threshold to trigger blackhole filtering, blackhole filtering is triggered. If blackhole filtering is triggered, all inbound traffic that is destined for the public IP address is dropped and the related services become inaccessible. This topic describes how to view the information about a blackhole filtering event. The information includes the point in time when blackhole filtering is triggered and the amount of attack traffic.
Background information
For more information about blackhole filtering see Blackhole filtering policy of Alibaba Cloud.
The following table lists the thresholds at which blackhole filtering is triggered
in each region. In the following table, a tick () indicates that the feature is supported and a cross (
) indicates that the feature is not supported.
Region | Support IPv4 | Support IPv6 | ECS instance with one vCPU and simple application server with one vCPU | ECS instances with two vCPUs | ECS instance with more than four vCPUs | SLB instance, EIP, EIP that is associated with a NAT gateway, and WAF instance |
---|---|---|---|---|---|---|
China (Hangzhou) | ![]() |
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500 Mbit/s | 1 Gbit/s | 5 Gbit/s | 5 Gbit/s |
China (Shanghai) | ![]() |
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500 Mbit/s | 1 Gbit/s | 2 Gbit/s | 2 Gbit/s |
China (Qingdao) | ![]() |
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500 Mbit/s | 1 Gbit/s | 5 Gbit/s | 5 Gbit/s |
China (Beijing) | ![]() |
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500 Mbit/s | 1 Gbit/s | 2 Gbit/s | 2 Gbit/s |
China (Zhangjiakou) | ![]() |
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500 Mbit/s | 1 Gbit/s | 2 Gbit/s | 2 Gbit/s |
China (Hohhot) | ![]() |
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500 Mbit/s | 1 Gbit/s | 2 Gbit/s | 2 Gbit/s |
China (Shenzhen) | ![]() |
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500 Mbit/s | 1 Gbit/s | 2 Gbit/s | 2 Gbit/s |
China (Heyuan) | ![]() |
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500 Mbit/s | 1 Gbit/s | 2 Gbit/s | 2 Gbit/s |
China (Chengdu) | ![]() |
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500 Mbit/s | 1 Gbit/s | 2 Gbit/s | 2 Gbit/s |
China (Hong Kong) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
Japan (Tokyo) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
Singapore (Singapore) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
Australia (Sydney) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
Malaysia (Kuala Lumpur) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
Indonesia (Jakarta) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
India (Mumbai) | ![]() |
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500 Mbit/s | 1 Gbit/s | 1 Gbit/s | 1 Gbit/s |
South Korea (Seoul) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
Germany (Frankfurt) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
UK (London) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
US (Silicon Valley) | ![]() |
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500 Mbit/s | 1 Gbit/s | 2 Gbit/s | 2 Gbit/s |
US (Virginia) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |
UAE (Dubai) | ![]() |
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500 Mbit/s | 500 Mbit/s | 500 Mbit/s | 500 Mbit/s |