Posted on: Mon, 22 Dec 2025 06:52:31 UTC
Impact Start Time: Mon, 22 Dec 2025 06:52:21 UTC
Shanghai II (SHA2), Beijing (BJS1), Beijing III (BJS3) Datacenter Issue
Customer Impact: Customers may encounter intermittent issues with CDN URLs failing to resolve.
Available Workaround:

For Road warriors: Modify PAC File or Subcloud and remove the problematic Datacenter. For more information please refer to: https://help.zscaler.com/zia/editing-subcloud.

For customers using GRE: It is important to ensure that you fail over to the secondary DC. For more information on configuring high availability when using GRE, please refer to https://help.zscaler.com/zia/configuring-gre-tunnels.

For customers using IPsec: It is also important to ensure that you fail over to the secondary DC. For more information on configuring high availability when using IPsec, please refer to https://help.zscaler.com/zia/configuring-ipsec-vpn-tunnel.


Next Update: 4 Hours
Datacenters affected: APAC, Beijing, Beijing III, Shanghai II
Status: In Progress
Event Type: Under Investigation

Zscaler is currently investigating reports of an issue with its Shanghai II (SHA2), Beijing III (BJS3) datacenters. We are investigating periods of slowness, connection timeouts and/or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. 

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and updates will be posted there as they become available.

Latest Update - Mon, 22 Dec 2025 10:58:22 UTC

The issue has resurfaced, impacting Shanghai II (SHA2) and Beijing III (BJS3) with intermittent slowness, timeouts, and increased latency. We are investigating further and will share updates when available.

Update - Mon, 22 Dec 2025 08:24:46 UTC

Zscaler has implemented mitigation for the issue. Our systems remain fully operational, and we will continue to monitor closely to ensure ongoing stability.

Update - Mon, 22 Dec 2025 10:58:22 UTC

The issue has resurfaced, impacting Shanghai II (SHA2) and Beijing III (BJS3) with intermittent slowness, timeouts, and increased latency. We are investigating further and will share updates when available.


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