VMkernel Networking Layer - VMware
docs.vmware.com › en › VMware-vSphereAug 30, 2021 · NFC provides a file-specific FTP service for vSphere. ESXi uses NFC for copying and moving data between datastores. VMkernel adapters configured with the provisioning TCP/IP stack handle the traffic from cloning the virtual disks of the migrated virtual machines in long-distance vMotion.
KB1198: NFC connectivity troubleshooting steps
https://www.veeam.com/kb119826.08.2011 · The NFC connection requires the following: DNS Resolution of the target host Port 902 is open to/from Backup Server/Proxy to ESX (i) host Permissions to download files via ESX (i) host and/or vCenter An issue with Port 902 may represent an issue with a firewall on the ESXi host, Veeam Proxy, or the connection between the two.