Anti-DDoS Pro or Anti-DDoS Premium uses specific IP addresses to proactively detect the health status of your protected origin servers. We recommend that you do not block these IP addresses.
Anti-DDoS Pro or Anti-DDoS Premium proactively detects the health status of your protected origin servers at irregular intervals. This allows you to make sure that the origin servers can respond to the normal requests forwarded by Anti-DDoS Pro or Anti-DDoS Premium.
Anti-DDoS Pro or Anti-DDoS Premium uses fixed IP addresses to detect only the health status of your protected origin servers. The detection does not affect your origin servers. If data packets from proactive detection IP addresses are found in the access logs of your protected origin servers, it does not mean your origin servers are under attack. We recommend that you add proactive detection IP addresses to a whitelist in the access control policies of your origin servers. This allows you to make sure that the health check feature of Anti-DDoS Pro or Anti-DDoS Premium works as expected.
Proactive detection IP addresses at Layer 3
| Region | Proactive detection IP address |
|---|---|
| China (Qingdao) | 47.104.162.123 |
| China (Beijing) | 39.107.84.97 |
| China (Hangzhou) | 47.97.187.10 |
| China (Shanghai) | 47.100.176.74 |
| China (Shenzhen) | 120.78.69.183 |
| Line cn335, China Unicom Dalian branch | 211.93.148.207 |
| China (Hong Kong) | 47.52.224.185 |
| Singapore | 47.74.135.107 |
| Australia (Sydney) | 47.91.45.70 |
| Malaysia (Kuala Lumpur) | 47.254.197.21 |
| US (Virginia) | 47.90.210.37 |
| US (Silicon Valley) | 47.254.31.65 |
| Germany (Frankfurt) | 47.254.133.240 |
Proactive detection IP addresses at Layer 4 and Layer 7
| Type | Proactive detection IP address |
|---|---|
| Private network |
|
| Internet |
|