April 2017

Zscaler provides transparency around service availability and changes to our customers. Please refer to Zscaler’s service continuity customer notification policy for details.

Scheduled For: April 15, 2017 | 1:00 UTC - 9:00 UTC
Zscaler.net cloud upgrade to 5.4 Release

Zscaler is pleased to announce its 5.4 release upgrade for its Zscaler.net.net cloud environment. The upgrade will be deployed across the cloud during the upgrade window beginning at 6:00 PM PDT on April 14, 2017 ( (01:00 AM UTC on April 15, 2017 ) continuing for up to eight hours. The Zscaler Administration UI will be placed in a maintenance mode with no policy management or reporting access possible during this time.  All logs will be collected and will be available when the maintenance window is closed.

Start time:  April 15, 2017 | 1:00 UTC 

End time: April 15, 2017 | 5:15 UTC 

Up Coming
Scheduled For: June 06, 2017 | 0:00 UTC - 0:00 UTC
New Range and Upcoming FQDN resolution change for VPN and PAC for Tianjin Datacenter on 6/6/2017

Dear customers, in accordance with Zscaler Service Continuity Policy we would like to notify you of the following changes: 

A new IP Range is online in Tianjin (  Please make sure your firewall settings reflect this change.

Additionally the FQDN resolution listed below will change on the following date- June 6, 2017


Current FQDN




FQDN On or After 06/06/17



For more information please visit https://ips.zscaler.net/cenr.

Tianjin Data Center Issue

We are investigating an issue with our Tianjin data center. We are investigating periods of slowness and/or increased latency. We will post additional information on this incident as it is available.

Update: 4/6/2017 10:08:48 UTC - This incident has been resolved. Please contact Zscaler Support if you have additional questions.


Scheduled For: April 03, 2017 | 23:00 UTC - April 04, 2017 | 1:00 UTC
Atlanta DC Scheduled Maintenance

Zscaler will be performing planned maintenance in our Atlanta II (ATL2) datacenter on Monday, April 3rd at 4pm PDT. (April 3rd at 23:00 UTC)

This maintenance is expected to last up to a maximum of 2 hours. During such window customers' traffic to the Atlanta DC might be affected.

Maintenance Window

Start time is April 3rd at 4pm PDT. (April 3rd at 23:00 UTC)

End time is  April 3rd at 6pm PDT. (April 4th at 01:00 UTC)


This activity has been completed.