Spotlight Cloud Help > Monitoring VMware > VMware connections > VMware connection requirements VMware connection requirements Connect VMware servers fulfilling the following requirements to Spotlight Cloud. VMware ESX infrastructure. VMware vCenter 2.5 (or later). VMware ESX Server 4.0 (or later) The username used to connect to the virtual guest machine must have at least a read-only role. Ensure any firewall is configured to open TCP port 443.