You can select the data transfer protocol you want to use for copying data with vCloud Connector. The protocol is used when you copy data with the Copy command as well as when data is copied for features such as Content Sync and Datacenter Extension.

vCloud Connector supports two data transfer protocols.


The HTTP(S) protocol is the default protocol in vCloud Connector.

By default, data is encrypted with this protocol, that is, HTTPS is used. You can choose to deselect encryption. See Data Encryption.

With HTTP(S), data transfer occurs over port 443 when SSL is enabled and over port 80 when SSL is disabled.


UDT is a reliable, high-speed data transfer protocol based on UDP (User Datagram Protocol). UDT offers significantly higher speeds for transfer over high-latency, high-bandwidth networks.

By default, data is transferred as plain text with the UDT protocol. You can choose to encrypt data. See Data Encryption.

With UDT, data transfer occurs over a dynamically-generated port on the source node and port 8190 on the destination node. Any firewall rules must allow for this type of connection for UDT-based data transfer. (When you copy data between a private cloud and a public cloud, data transfer is between a dynamically-generated port on the private cloud node and port 8190 on the public cloud node. Port 8190 must be open in the public cloud.)

If you use a proxy server with UDT, communication between the local node and the proxy server occurs with two separate connections. See Using a Proxy Server with UDT for more information.

By default, vCloud Connector uses HTTP(s) as the data transfer protocol. To use UDT, you need to select the Enable UDT option in the vCloud Connector Node Admin Web console for both the source and destination nodes. Note that if UDT is enabled in only one of the nodes, the default protocol, HTTP(s), will be used.