Service Upgrade

[Upgrade] [Web Application Firewall] Upgrade for WAF Transparent Proxy Clusters

Affected Time

2025-09-23 00:30:00 - 2025-09-23 07:00:00 (UTC+08) Batch 1 (Chengdu Cluster)
2025-09-24 00:30:00 - 2025-09-24 07:00:00 (UTC+08) Batch 2 (Chengdu Cluster)

[Upgrade Details]

Alibaba Cloud will perform an upgrade on the transparent proxy clusters for the Web Application Firewall (WAF) service in the China (Chengdu) region.

[Impact]

During the upgrade window, some transparent proxy instances may experience transient connection interruptions or refused connections. For clients with an automatic reconnection mechanism, the duration of any single interruption is expected to be less than one minute. Please monitor your services and prepare a disaster recovery plan, such as implementing connection retries or failover to the origin server.