The following ports must be open on NSX Manager.

Port

Required for

443/TCP

Downloading the OVA file on the ESX host for deployment

Using REST APIs

Using the NSX Manager user interface

80/TCP

Initiating connection to the vSphere SDK

Messaging between NSX Manager and NSX host modules

1234/TCP

Communication between ESX Host and NSX Controller Clusters

5671

Rabbit MQ (messaging bus technology)

22/TCP

Console access (SSH) to CLI. By default, this port is closed.

If the hosts in your clusters were upgraded from vCenter Server version 5.0 to 5.5, you must open ports 80 and 443 on those hosts for Guest Introspection installation to be successful.