Zscaler operates the world’s largest security-as-a-service (SaaS) cloud platform to provide the industry’s only 100% cloud-delivered web and mobile security solution. The Zscaler highly scalable, global multi-cloud infrastructure features three key components: the Zscaler Central Authority, Zscaler Enforcement Nodes, and Nanolog clusters.
Zscaler Central Authority
The Zscaler Central Authority (CA) is the brain and nervous system of a Zscaler cloud. It monitors the cloud and provides a central location for software and database updates, policy and configuration settings, and threat intelligence. The CA consists of one active server and two servers in passive standby mode. The active CA replicates data in real time to the two standby CAs, so any of them can become active at any time. Each server is hosted in a separate location to ensure fault tolerance.