Dell Wyse Enhanced Ubuntu Linux T50 Manual de usuario descargar pdf (Pagina 38)

Chapter 5. Printer Features

After creating the symlinks, try connecting to your ThinLinc cluster with a ThinLinc cluster and bring up

an application that lists the available printers. The list of printers should now be limited according to

conﬁguration.

Note: The printer list limitation doesn’t work for applications that use the deprecated cupsGetPrinters

library call. This means that older applications might show the whole list of printers. The access

control are still enforced, which means that even if a disallowed printer is shown in the list of printers,

users can’t submit jobs to it.

Most applications in a modern Linux distribution doesn’t have this problem.

5.5.4. Conﬁguration

Conﬁguration of the printer access control feature is mostly a matter of using tlwebadm (see Chapter 16

for details) to add the hardware address of all terminals as well as information about where they are

located and which printers are to be available for each location.

5.5.4.1. Unknown Terminals / Terminals Without Hardware Address

When a client reports a hardware address that is not present in the database of terminals, or when no

hardware address is reported, the default behaviour is to disallow access to all printers, rendering an

empty printer list for the user.

There is however a way to give even unknown terminals access to one or more printers - deﬁne a special

location and check the Use for unknown terminals and terminals without hardware address checkbox.

Then add the printers that should be available for the unknown terminals.

One common conﬁguration is to add such a location and then add the thinlocal printer to this location.

This way, unknown terminals, for example people working from their home computers, will be able to

user their locally connected printer, but no other printer will be available.

5.6. Printer Conﬁguration on Windows Terminal Servers

If your ThinLinc setup uses a Windows Terminal Server for some applications, access to printers for

these applications is handled automatically by redirection over RDP. When rdesktop is started via

tl-run-rdesktop as is the case when applications on Windows Terminal Servers are started via any of the

ThinLinc wrapper commands, the list of printers available to the user on the Linux or Solaris server

running the ThinLinc session is automatically fetched. Each printer is then added to the rdesktop

commandline in a way that makes it appear in the user’s session on the WTS.

One advantage of this feature is that the Section 5.5 will be active even for programs running on

Windows Terminal Servers, since only the printers the user are allowed to see and use are exported.

For some special cases, manually conﬁguring printers on the Windows Terminal Server may be required.

This is the case for example if some application requires that the name of the printer is exactly the same

across sessions, as printers added automatically have names that contain the WTS session ID. For

information on how to conﬁgure printers manually, see Appendix D

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Dell Wyse Enhanced Ubuntu Linux T50 Manual de usuario Pagina 38