Required Ports for vCenter Server - VMware
docs.vmware.com › en › VMware-vSphereNov 02, 2020 · There are internal ports that are used only for inter-process communication. VMware uses designated ports for communication. Additionally, the managed hosts monitor designated ports for data from vCenter Server. If a built-in firewall exists between any of these elements, the installer opens the ports during the installation or upgrade process.