TCP and UDP Ports for the vSphere Client
TCP and UDP Ports
Port
Purpose
Traffic Type
443 (Default)
HTTPS access
vSphere Client access to vCenter Server
vSphere Client access to ESXi hosts
vSphere Client access to vSphere Update Manager
Incoming TCP
902 (Default)
vSphere Client access to virtual machine consoles
Incoming and outgoing TCP, outgoing UDP
903
Remote console traffic generated by user access to virtual machines on a specific host.
vSphere Client access to virtual machine consoles
MKS transactions (xinetd/vmware-authd-mks)
Incoming TCP