Zscaler will be expanding its global data center footprint and performing planned maintenance at our Chicago II (CHI2) Data Center. We expect minimal to no impact to services during the maintenance window. 

Please update your firewall policy rules and/or any upstream ACL(s) to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalertwo.net/cenr

Maintenance Window:

Start time is November 12, 6:00 pm PDT (November 13, 2:00 UTC) 

End time is November 13, 12:00 am PDT (November 13, 8:00 UTC)

• Update 11/12: Extending maintenance

Update - Thu, 13 Nov 2025 07:48:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.