Dear Alibaba Cloud user,

To improve services, Security Center plans to upgrade log analysis and CTDR features on March 27, 2025. The changes are as follows:

Log analysis:

• • Effective March 27, 2025, the delivery service for network logs, including web access logs, DNS logs, network session logs, and local DNS data, will be discontinued.
  • If you have enabled network log delivery before this date, the corresponding Logstore will still be available for queries but will not receive new log data.

CTDR

• • Effective March 27, 2025, service access settings no longer support web access logs, DNS logs, network session logs, local DNS data, and failed MySQL /FTP logon logs from Security Center.
  • The delivery service for these logs in log management will end, with only existing data available for queries.

We recommend you planning ahead and updating your settings to prevent any disruptions to your systems and services. If you need help or have questions, feel free to reach out to our customer service team.