The virtual CenterTools DriveLock channel (ICA protocol) is included in the UDLX itself and must be installed on the Citrix XenApp server.
DriveLockcan read hardware data from local USB devices and transfer these data with the help of the Virtual ICA Channel Extension to the XenApp server. When using whitelists, rules based on the hardware properties of the connected drive (e.g. manufacturer details, model and serial number) are taken into account.
The following steps are important in order to be able to define the access rights for drives via the DriveLock server configuration:
See also this document from CenterTools which describes the configuration of DriveLock on the server side in more detail: How to use CenterTools DriveLock with IGEL Thin Clients (PDF).