ESXi hosts and other network components are accessed using predetermined TCP and UDP ports. If you manage network components from outside a firewall, you might be required to reconfigure the firewall to allow access on the appropriate ports.
The table lists TCP and UDP ports, and the purpose and the type of each. Ports that are open by default at installation time are indicated by (Default).
| 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 |
