Anti-DDoS Proxy (Chinese Mainland) plans to adjust back-to-origin CIDR blocks on October 15, 2024. The following CIDR block will be changed:

• Offline 112.124.159.0/24
• 118.178.15.0/24 adjust to 118.178.15.64/27, 118.178.15.96/27, 118.178.15.128/27, 118.178.15.160/27 and 118.178.15.224/27
• 120.27.173.0/24 adjust to 120.27.173.0/27, 120.27.173.32/27, 120.27.173.64/27 and 120.27.173.96/27
• 123.57.117.0/24 adjust to 123.57.117.128/27 and 123.57.117.160/27
• 182.92.253.0/24 adjust to 182.92.253.32/27 and 182.92.253.64/26
• 47.110.183.0/24 adjust to 47.110.183.0/25 and 47.110.183.128/26
• 47.99.20.0/24 adjust to 47.99.20.64/26, 47.99.20.128/26 and 47.99.20.192/26

You can navigate to the Website Config page and click Back-To-Source CIDR Blocks in the upper-right corner or use OpenAPI to obtain the complete list of back-to-origin CIDR blocks. We recommend using OpenAPI to obtain real-time updates on back-to-origin CIDR blocks.

IMPORTANT: If you have configured access control policies on your origin server to limit source IP addresses, we suggest updating the ACL policies as soon as possible.

If you have any questions, submit a ticket or contact us in the DingTalk service group for consultation. Thank you for your support and cooperation.