Document URL: https://docs.openshift.com/container-platform/4.5/installing/installing_vsphere/installing-restricted-networks-vsphere.html#installation-network-user-infra_installing-restricted-networks-vsphere
Section Number and Name: Networking requirements for user-provisioned infrastructure
Describe the issue: 123/udp port is missing from the required list of ports of IPI/UPI deployments.
Suggestions for improvement: 123/udp is required for both IPI and UPI deployments and should be included as part of the "Networking requirements for user-provisioned infrastructure" section of the documentation.
So I wonder if mentioning NTP might actually make the most sense in this existing page:
The page you link to covers requirements for the nodes that form the cluster, but not resources external to the cluster.
> The page you link to covers requirements for the nodes that form the cluster, but not resources external to the cluster.
Clusters deployed in restricted environments use external (NTP server) resources by default. In this context, docs should either highlight 123/TCP as requirement or point out that chony config should updated in restricted environments to point to internal NTP servers.