In addition to collecting syslog data from ESXi hosts, you can also configure vRealize Log Insight to capture tasks, events, and alarms data from vCenter Server. The collection of this information from vCenter Server 5.1 or later provides support for centralized auditing and deeper insight into overall host and site operations. vRealize Log Insight uses the VMware vSphere API to connect to vCenter Server systems and collect data over port 9000/TCP.