1. A method for zone-based intrusion detection, the method comprising: providing a cloud-based multi-tenant system, wherein each tenant of the multi-tenant system represents a virtual computing system within a zone of the cloud for a customer; providing a server communicatively coupled to the tenants within the multi-tenant system; and providing a zone-based intrusion detection system (ZIDS) module running on the server that is configured for: monitoring unencrypted live traffic in each zone from within the server, analyzing and executing processes in real time in each zone, and detecting zone-based intrusion for each tenant of the cloud-based multi-tenant system based on the monitored live traffic, an inspected software, and the analyzed process.