Cool Solution - Xrdp for UCC terminal servers

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XRDP is a daemon running on a UCC terminal server, which allows users to open a X session on the server using the Remote Desktop Protocol (RDP). This protocol is natively supported by Microsoft Windows and many other operating systems and thus does not require additional software to be installed on the client PCs.

UCC thin clients support RDP sessions using freerdp.


XRDP is provided in the Cool solutions repository. To install it, type

apt-get install univention-xrdp

Configuration on the terminal server

Allowed users

By default all users of the UNIX group Domain Admins are allowed to connect using RDP. The name of the group can be changed by setting the UCR variable xrdp/access/admins.

Maximum number of concurrent sessions

The maximum number of concurrently running RDP sessions is by default limited to 10 and can be changed using the UCR variable xrdp/sessions/max.

Login window customization

The title and the images used in the login windows can be configured using the UCR variables xrdp/title and xrdp/imagedir.

The directory must contain 4 images using the Windows bitmap format. The first two are used as the rectangular logo at the left side on the input fields, the other two are used for the banner displayed below the input window:

24 bit color logo, 140 x 140
256 color logo, 140 x 140
24 bit color banner, 256 x 192
256 color banner, 256 x 192

Configuration on the UCC client

The UCC terminal server should be configured through a "UCC user session" policy.

The UCC terminal server must be configured as the "Windows terminal server" and "xrdp1" must be set as the "Windows domain".

Known issues

Wrong keyboard layout

When you log into KDE using XRDP, the keyboard is configured to use the US layout by default. To change this open the K-Menu, switch to the Computer tab, open System settings, then open the Regional & Languages in the Personal section. There open Keyboard Layout, select Enable keyboard layouts and add the requested layout from the left list of available layouts. Click the right arrow to add the layout and reorder it to the top in the right list of Active layouts using the up/down buttons. Apply the changes and close the application.


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