Jason Boche posted this network diagram on VI3, it shows exactly what ports VC, ESX and other services needed for a functioning enterprise use.   This diagram is extremely helpful in troubleshooting network issues and also in helping put your companies security department at ease.  Thanks Jason!

[

Click to Enlarge](https://www.vmwaretips.com/wp-content/gallery/misc/vi3-network_diagram.jpg){.thickbox}