Zscaler Outage History

Zscaler experienced an issue where email notifications for Platform Alerts configured in the ZIA Admin Portal were not being delivered to customers. The incident affected the Admin UI component and prevented users from receiving email notifications when alert-triggering events occurred. Zscaler investigated the root cause and implemented a fix to restore normal email notification delivery, with the incident lasting approximately 132 hours.

Zscaler experienced an issue with its Oslo III datacenter that affected EMEA region traffic for 26 minutes. Users were advised to failover to secondary or alternate datacenters to mitigate traffic impact. The incident was classified as minor and resolved after investigation.

Zscaler's Cape Town IV datacenter experienced intermittent packet loss due to a fiber outage affecting connectivity to backend services, resulting in intermittent service degradation for a subset of customers in the EMEA region. The issue was caused by a network provider's fiber outage, and Zscaler mitigated the impact by rerouting traffic to alternate infrastructure paths. The incident lasted 5.5 hours while repair activities were coordinated with the network provider.

Zscaler experienced user authentication issues at their Sao Paulo II datacenter that affected traffic routing for users in the Americas region. The issue was initially mitigated after investigation, but resurfaced and expanded to impact the Zscaler.net cloud as well, requiring users to failover to secondary datacenters. The incident lasted 25.7 hours with teams investigating the root cause of the recurring problem.

Zscaler experienced a Client Connector Portal issue caused by a software defect introduced during a recent system update, initially affecting the ZS3 cloud and later resurfacing on the ZSN cloud. The incident impacted portal functionality across multiple Zscaler cloud environments (ZS3, ZSN, and ZSC). Zscaler deployed a software fix that restored service to the affected clouds within 3.2 hours, with proactive measures applied to ensure stability across all environments.

Zscaler experienced an issue with Client Connector-based end user notifications on its zscaler.net Cloud platform. The incident was classified as minor and lasted 54 minutes. Zscaler detected the problem and provided ongoing updates through their customer support portal during the investigation and resolution process.

Zscaler experienced an issue with their Oslo III datacenter that affected EMEA region traffic for 18 minutes. Users were advised to failover to secondary or alternate datacenters to avoid traffic disruptions. The incident was resolved after investigation and monitoring.

Zscaler experienced an issue with Client Connector-Based End User Notifications on its zscaler.net Cloud platform. The minor incident affected notification functionality for end users using the Zscaler Client Connector. The issue was resolved after 34 minutes.

Zscaler experienced issues with their administration UI and user authentication systems on the zscaler.net Cloud, affecting users' ability to access admin functions and authenticate properly. The service disruption was classified as minor and lasted 19 minutes before being resolved.

Zscaler experienced a minor incident affecting reporting and logging functionality across multiple cloud platforms (zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net), specifically impacting the Nanolog component. While security policies continued to be enforced and user logs were still being collected during the 58-minute outage, customers temporarily lost access to reporting and logging features. The incident was resolved with all collected logs made available to users once service was restored.