6.1. About Desktop Access

Users can access their virtual desktops from two types of clients, Sun Ray Clients and Remote Desktop Protocol (RDP) clients.

Sun Ray Clients, whether traditional hardware clients or Oracle Virtual Desktop Clients, connect to Sun Ray Software over the Oracle Appliance Link Protocol (ALP). Sun Ray Software runs on the Oracle VDI host and includes the Oracle VDI kiosk session and the Sun Ray Windows connector (uttsc). The kiosk session connects Sun Ray users to Oracle VDI, and the Sun Ray Windows connector completes the connection to the desktops.

The RDP protocol was developed by Microsoft as a way to establish secure connections between servers and remote clients. Oracle VDI includes a built-in RDP broker that enables RDP clients to access virtual desktops. These RDP clients include the Oracle Secure Global Desktop RDP client (ttatsc) and Microsoft Remote Desktop Connection (RDC).

The following table shows Oracle VDI features by client type. The choice of RDP protocol and virtual machine configuration also influence which features can be used for a virtual desktop. For more information, see Section 5.1.2, “Choosing Between VRDP and MS-RDP”.

Table 6.1. Supported Features by Client Type


Sun Ray Client (Hardware)

Oracle Virtual Desktop Client

Oracle Secure Global Desktop

Microsoft Remote Desktop Connection

Audio recording (input audio)

Audio redirection

Clipboard redirection

COM port mapping

Drive redirection (client drive mapping)







Smart card device redirection

USB device redirection

Video acceleration


Windows media redirection



Windows printer mapping (client printing)

[a] Access only to client USB storage devices is supported. Paths on an Oracle VDI host can also be mapped to remote desktops using pool RDP settings, see Section 5.1.4, “Configuring Pool RDP Options”.

[b] RDP 7 and later only.

[c] Sun Ray 2 and 3 clients only.

For Sun Ray Clients, support for these features can vary by hardware version and the software release. Check the documentation for your products to see what is supported. For the latest list of peripherals tested to work with Sun Ray Software, see the Sun Ray Client and Oracle Virtual Desktop Client Peripherals List.

For Oracle Secure Global Desktop, support for these features depends on the software release. Check the documentation for your product to see what is supported.

For Microsoft Remote Desktop Connection, support for these features depends on the which RDP version is used. Check the documentation for your version to see what is supported.

Color Depth

Oracle Secure Global Desktop does not support 15-bit color depths. If this color depth is specified for a desktop, 8-bit color is used instead.

32-bit color is available on Windows 7 or Windows Server 2008 and later platforms. To display 32-bit color, the client device must be capable of displaying 32-bit color.

Encryption Level

You can only use the Low, Client-compatible, or High encryption levels with Oracle Secure Global Desktop and Sun Ray Clients. The Federal Information Processing Standards (FIPS) encryption level is not supported.

Multi-Monitor and Windows 7

If Microsoft RDP is selected as the desktop protocol, multi-monitor support is only available in Windows 7 Ultimate and Enterprise editions. Windows 7 Professional does support a single desktop spanned across multiple monitors (spanned mode). See the article Using Multiple Monitors in a Remote Desktop Session for an explanation.

Transport Layer Security

Oracle Secure Global Desktop does not support the use of Transport Layer Security (TLS) for server authentication, and to encrypt Terminal Server communication.

USB Redirection

USB 1.0 and USB 2.0 are supported. In order to use USB 2.0, a USB 2.0 (EHCI) controller must be configured in the desktop or template. See Section 5.1.5, “Enabling USB Redirection” for details. Sun Ray 2 Clients only support USB 1.0. If USB 2.0 is enabled, Sun Ray 2 Clients auto-negotiate down to USB 1.0. Sun Ray 3 Clients and later support USB 2.0.