Citrix Receiver for Linux 13.5

Citrix Receiver for Linux 13.5
Citrix Receiver for Linux 13.5
Mar 21, 20 17
About this release
Fixed issues
Known issues
System requirements
Install and setup
Customize a Citrix Receiver for Linux installation
Start Citrix Receiver for Linux
Use Citrix Receiver for Linux as an ICA-to-X proxy
Uninstalling Citrix Receiver for Linux
Connect
Connect to resources from a command line or browser
T roubleshoot connections to resources
Customize Citrix Receiver using configuration files
Configure XenApp connections using Web Interface
Optimize
Improving the user experience
Secure
Troubleshoot
SDK for Citrix Receiver for Linux
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.1
About Citrix Receiver for Linux 13.5
Mar 0 6, 20 17
Citrix Receiver for Linux is a software client that lets you access your desktops, applications, and data easily and securely
from many types of Linux devices. Working with a Citrix-enabled IT infrastructure, Receiver gives you the mobility,
convenience, and freedom you need to get your work done.
Cit rix Receiver f or Linux 13.5
T his release provides the following new features and enhancements, and resolves a number of previously reported issues to
improve the user experience.
Support for multi-stream ICA
Support for HT ML5 video redirection
Support for GStreamer 1.x
Support for the Server Name Indication (SNI) extension to T LS. T his allows a server hosting multiple secure sites to
present the correct certificate to Citrix Receiver.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.2
Citrix Receiver for Linux 13.5 Fixed Issues
Mar 0 7, 20 17
T he following issues were fixed in Receiver for Linux 13.x:
Receiver for Linux 13.5
Receiver for Linux 13.4
Receiver for Linux 13.3
Receiver for Linux 13.2
Receiver for Linux 13.1
Receiver for Linux 13.0
T he following issues have been fixed since Version 13.4:
HDXMediaStream Flash Redirection
User Experience
Session/Connection
User Interface
System Exceptions
HDX MediaSt ream F lash Redirect ion
If you resize a Microsoft Internet Explorer window with HDX MediaStream Flash Redirection enabled, websites with
Flash content might fail to resize to fit the modified Internet Explorer window.
[#LC6126]
Session/Connect ion
When you play a media clip within the desktop session on a HP T hin Client, Windows Media Player might generate the
following error message:
"Windows Media Player encountered a problem while playing the file."
In certain scenarios, a blank or a black window can appear.
[#LC5508]
T he drop-down menus of published applications might disappear immediately after appearing when launched from Citrix
Receiver for Linux.
[#LC5574]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
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When you launch a session and then cancel the connection progress bar, the wfica process might send a SIGT ERM to all
processes within its process group. T he processes can exit unexpectedly while sharing the process group.
[#LC5858]
In a multi-monitor environment, when a seamless application is running on the second monitor, switching between
workspaces in Gnome 3 can cause the seamless application to render incorrectly. T he issue occurs when "workspacesonly-on-primary" is enabled on Gnome 3.
[#LC5897]
T he keyboard shortcut "Ctrl+Alt+Del" in the Desktop Viewer toolbar might not work in Linux VDA sessions.
[#LC6164]
When you attempt to launch an application by clicking the corresponding desktop icon, the application might fail to
launch.
[#LC6285]
Attempts to start a session that is enabled with H.264 encoding support on a Linux VDA can result in a segfault error in
wfica.
[#LC6603]
Syst em Except ions
Attempts to connect to certain XenApp or XenDesktop sites can cause AuthManagerDaemon to exit unexpectedly.
[#LC6166]
User Experience
When you launch a seamless application that contains multiple child windows, you might not be able to move certain
child windows. Additionally, you might not be able to change focus to these windows.
[#LC4342]
When you log off from a local desktop with the self-service credentials dialog open, further attempts to log on to selfservice can fail and self-service might never progress to the authentication dialog box.
[#LC4939]
When you launch Microsoft Excel in seamless mode, the keyboard focus sometimes does not move to the "Find"
window in the application.
[#LC5964]
User Int erf ace
T he "Sametime" icons might not appear in the notification area when using Citrix Receiver for Linux.
[#LC3956]
When you move the Microsoft Lync chat window to a new position, the window might not redraw completely.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.4
[#LC5583]
Attempts to move the "Find" window in Microsoft Excel launched in seamless mode might fail.
[#LC5963]
When minimizing a child window (for example, the main window of Spy++ is the parent window and the window for
detecting specified windows is the child window), the size of the minimized title bar might appear to be smaller.
[#LC6210]
T he following issues have been fixed since Version 13.3:
Client Device Issues
Smart Cards
Enhancement
System Exceptions
Logon/Authentication
User Experience
Session/Connection
User Interface
Client Device Issues
With client drive mapping enabled, mapped drives occasionally take longer than expected to access.
[#LC3930]
Enhancement
T his release introduces Relative Mouse support – a feature that provides an option to interpret the mouse position in a
relative rather than absolute manner. T his capability is required for applications that demand relative mouse input rather
than absolute.
Note: T his feature is available only in sessions running on XenApp or XenDesktop 7.8. It is disabled by default.
T o enable the feature:*
in the file $HOME/.ICAClient/wfclient.ini, in the section [WFClient], add the entry RelativeMouse=1.
T his enables the feature but keeps it inactive until you activate it.
T o activate the feature:
Type - Ctrl/F12.
Once the feature is enabled, type Ctrl/F12 again to synchronize the server pointer position with the client (the server and
client pointer positions are not synchronised when using Relative Mouse).
T o deactivate the feature:
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© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.5
Type Ctrl-Shift/F12.
T he feature is also switched off when a session window loses focus.
* Alternatively, consider using the following values for RelativeMouse:
RelativeMouse=2 Enables the feature and activates it whenever a session window gains focus.
RelativeMouse=3 Enables, activates, and keeps the feature activated at all times.
To change the keyboard commands, add settings like:
RelativemouseOnChar=F11
RelativeMouseOnShift=Shift
RelativemouseOffChar=F11
RelativeMouseOffShift=Shift
T he supported values for RelativemouseOnChar and RelativemouseOffChar are listed under [Hotkey Keys] in the
config/module.ini file in the Citrix Receiver installation tree. T he values for RelativeMouseOnShift and
RelativeMouseOffShift set the modifier keys to be used and are listed under the [Hotkey Shift States] heading.
[#LC5000]
Logon/Aut hent icat ion
Version 13.3 of the Citrix Receiver for Linux fails to pass certain command line parameters, including the -clearpassword
option, to older versions of XenApp. As a result, users' attempts to log on can be unsuccessful.
[#LC4594]
Session/Connect ion
Attempts to launch a user session in full-screen mode using the "-span" command line option might fail.
[#LC3394]
After resizing the secondary monitor in a dual-monitor configuration, the Windows taskbar can fail to revert to the
original location.
[#LC3856]
A segfault error in wfica can cause sessions to disconnect or become unresponsive during screen updates that result
from activities such as highlighting or scrolling.
[#LC3947]
When reconnecting to a disconnected, multiple-monitor session on Ubuntu 14.04, the session window appears on only
one monitor instead of all.
[#LC4181]
Attempts to connect to an anonymous store might fail with the following error messages:
"NoWebUIAuth 0" and "Cannot complete your request"
[#LC4270]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.6
Attempts to launch a published desktop can fail when using an SSL proxy host such as SSL Relay.
[#LC4739]
A published instance of Internet Explorer might lose focus and duplicate when a pop-up window appears in the original
browser window.
[#LC5066]
Smart Cards
When using a smart card with pnabrowse, the PIN cannot be passed to the VDA and the authentication might fail. T he
session is launched but the logon screen appears.
[#LC4241]
Syst em Except ions
After playing media with Windows Media Player on an ARM hf based Linux client, sessions disconnect.
[#LC4625]
User Experience
Microphone audio quality in sessions running on XenApp/XenDesktop 7.6 can be poor.
[#LC3124]
In ARM hf implementations, the taskbar occasionally does not flash to indicate the presence of new Lync 2010
messages.
[#LC3688]
After unlocking a user session in a dual-monitor setup, minimized windows might not get restored to the correct position
and appear to be unresponsive.
[#LC3984]
When you launch an application on a Gnome 3 desktop and maximize the application, the position of the mouse cursor
might be offset by the distance of the Gnome 3 top bar.
[#LC4738]
Webcam redirection occasionally does not work in sessions running on Version 7.6 VDAs.
[#LC4751]
User Int erf ace
T he Copy and Paste function occasionally fails between server and server and server and user device.
[#LC4157]
T he mouse cursor disappears when playing full screen video and does not return to view until the video is no longer full
screen.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.7
[#LC4428]
A segment fault error can occur when certain third-party published applications spawn a dialog box. T he cursor is no
longer visible when you attempt to reconnect to the unexpectedly closed application.
[#LC4955]
T he following issues have been fixed since Version 13.2:
Session/Connection
User Experience
System Exceptions
User Interface
Session/Connect ion
After restoring a maximized seamless window, certain parts of the desktop fail to refresh automatically. T his only occurs
in some desktop environments, such as Ubuntu 12.04 Unity 2D.
[#LC0602]
When using the parameter "ProxyType=Secure," a segmentation fault can occur.
[#LC3396]
Attempts to copy and paste content from a published application to a local application can cause the ICA engine
component (wfica) process to close unexpectedly with a segmentation fault.
[#LC3480]
In some instances, the cached application list can get out of sync.
[#556245]
Syst em Except ions
In some cases, smart card authentication causes a session to exit unexpectedly.
[#582550]
User Experience
With this fix, the Russian time zone information can be updated in Receiver for Linux.
To enable this fix:
For XenApp 6.5, you must install a minimum of Hotfix Rollup Pack 5 or subsequent Rollup Pack hotfixes to redirect all
time zones correctly.
For the XenApp and XenDesktop 7.6 server operating system VDA, you must install Hotfix ICAT S760WX64014.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.8
If the server operating system is Windows Server 2008 R2 Service Pack 1, you must install Microsoft hotfix KB2870165
on the server.
Update both the server and user device operating systems to apply the latest time zone information.
You must install Microsoft hotfix KB2998527 for Windows and then update the time zone data for Linux.
[#LC1971]
User Int erf ace
T he icons of published applications might not display correctly on the taskbar.
[#LC3405]
Icons in seamless sessions might not appear on the taskbar while using ARM hard float (armhf) platforms.
[#LC4051]
An inaccurate dependency message is displayed when starting selfservice after installing Citrix Receiver with a tar.gz
distribution package on Fedora 21.
[#582071]
T he following issues have been fixed since Version 13.1:
HDX Plug and Play
Session/Connection
Logon/Authentication
User Experience
Server/Farm Administration
User Interface
HDX P lug and P lay
T he webcam might not work with Citrix GoToMeeting and Cisco WebEx when using the HDX RealT ime Optimization
Pack (Linux) for Microsoft Lync 2010. To enable this fix in its entirety, you must install both a Receiver for Linux hotfix and
an HDX RealT ime Optimization Pack (Linux) for Microsoft Lync 2010 hotfix that contains Fix #LA0339.
Not e : After installing this fix, if you start Microsoft Lync in a VDA session while a Citrix GoToMeeting or Cisco WebEx
video conference is running, the webcam might stop working. If this happens, stop and restart the camera from within
the video conference.
[#LC0339]
Logon/Aut hent icat ion
When users log on with smart card by using the Unicon user interface, users cannot enumerate or start applications if
the smart card contains more than two certificates and if only one of them is an authentication certificate. If the smart
card contains one client certificate for authentication, users can enumerate and start applications, however, the
following error message always appears: "Cert Client Authentication OID info set, but unexpected value:..."
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.9
[#LC2098]
Server/Farm Administ rat ion
If connections with Receiver for Linux go through a virtual private network (VPN) interface, Receiver fails when starting a
published application.
[#LC1284]
If running the command "ctx_rehash" to install a root or intermediate certificate on the user device, creating the correct
hash or link might fail with the error message "Error adding
store:AM_ERROR_HT T P_SERVER_CERT IFICAT E_NOT _T RUST ED[65150]". When this occurs, Receiver cannot use the
certificate and attempts to add a store fail.
[#LC1513]
With this fix, if the user adds a store by running the command "$ICAROOT /util/storebrowse --addstore < store URL>" or
by using the Self-Service Plug-in and if the "discovery" parameter is not included in the URL, then the "discovery"
parameter is appended to the URL automatically.
[#LC1517]
Session/Connect ion
When maximizing a window of a published Microsoft Office application in seamless mode, the window becomes
maximized, but its contents can be offset and the left and top frames might not be drawn.
[#LC0118]
In a multi-monitor environment, if the second monitor is rotated or has a different resolution, when starting a published
application in seamless mode and then maximizing the window, the server does not show the maximized window and the
window is unusable.
To enable the fix, in the file $HOME/.ICAClient/wfclient.ini, in the section [WFClient], add the entry
"T WIAvoidFullScreenWhenMaximized =True".
[#LC0354]
In a multi-monitor environment, if a published application window in seamless mode is maximized and restored several
times, on occasion, a gray colored background might appear in the second monitor instead of the application window.
[#LC0355]
In a multi-monitor environment, resizing the window of a published application in seamless mode in the second monitor
might fail while using client-side resize.
[#LC0356]
When switching between two published Remote Desktop (RDP) sessions in full-screen mode, such as mstsc1 and mstsc2,
the connection bar is not updated correctly and shows mstsc2 as the primary window even after switching to mstsc1.
[#LC0437]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.10
Attempts to start a session by using Receiver for Linux can cause the session to disconnect when transferring data
continuously through the Citrix Generic USB or Client drive redirection.
[#LC0522]
When trying to log on to the Web Interface by using the IP address, a segfault can occur and pnabrowse exits
unexpectedly.
[#LC0648]
When switching between a published application and Microsoft SQL Server 2012 Management Studio, if users maximize
both windows and then minimize the published application window only, the Microsoft SQL Server 2012 Management
Studio window does not redraw correctly and a few portions of the window are not updated.
[#LC0739]
T he window focus remains on the main window instead of switching to the dialog box. For example, when attempting
to close a published Notepad with the modified content, a message appears to ask if you want to save the content.
T he message dialog box is not the active window.
[#LC0952]
Receiver for Linux might close unexpectedly when copying an image from a published application to a local application.
[#LC1017]
Attempts to start a session by using Receiver for Linux can fail through Citrix NetScaler Gateway.
[#LC1103]
A blank error window might appear when a user opens an application in a VDA session that needs the web camera, which
is already in use by a local application.
[#LC1135]
When connecting to a XenDesktop 5.6 VDA and if the user device is connected to two monitors, there might be a
display issue in the second monitor. In addition, when maximizing the window in the second monitor, the window might
not expand completely on the screen.
[#LC1148]
When a session is started or resized, the frame buffer plug-in might not clear the screen.
[#LC1515]
Receiver fails if an automatic proxy server URL is configured on the user device. T he following syslog error appears in the
log:
Ubuntu1204LT Si386 kernel : [xxxx.xxxxxx] wfica [xxxx] segfault at 2 ip bxxxxxxx sp bxxxxxxx error 4 in
libproxy.so[bxxxxxxx+xxxx]
[#LC1584]
When session reliability is enabled and if data is continuously transferred through the Citrix Generic USB, the existing
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p.11
session might disconnect.
[#LC1588]
T he 64-bit version of Receiver for Linux might fail to register the browser plug-in.
[#LC1712]
On systems with Fix #LC1127 installed, Receiver for Linux 13.1.3 might become unresponsive when disconnecting from a
desktop session that is published by XenDesktop.
[#LC2365]
When users log on with Receiver for Linux and attempt to paste content within a hosted desktop published in XenApp
5.0, if users right-click and hover the mouse over the paste option, the session disconnects and a segmentation fault can
occur.
[#LC2467]
When connected with Receiver for Web, after downloading a StoreFront Services provisioning file (.cr) and then running
the storebrowse command "./util/storebrowse -C /tmp/receiverconfig.cr," the "Add Service Record Add Store" dialog
does not appear and the store is not created.
[#LC2669]
When using Receiver for Linux 13.1, if users right-click an icon that is in the Windows notification area, the Receiver
session might become unresponsive and mouse and keyboard inputs do not work until the session is closed and then
opened again.
[#LC2824]
User Experience
An error message might appear when scrolling through a large document in Receiver for Linux. Users must respond to the
error message to continue working within the session.
[#LC1127]
If the original screen resolution of a user device changes during a Receiver session, the session does not retain the fullscreen setting. As a result, the session size might change so that it does not match the current and original screen
resolutions.
[#LC1222]
If the icon name contains a backward slash ("\"), application icons might not appear correctly in Receiver for Linux.
[#LC1364]
Attempts to copy and paste content from Java applications to published applications might fail or the content from a
previous clipboard gets pasted. T he issue occurs when the Receiver for Linux fails to synchronize the user device
clipboard with the server clipboard information.
[#LC1856]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.12
On a Hewlett-Packard thin device that uses the hardware decoder for H.264 graphics, in a VDA session and after
starting an application in the session, attempts to copy and paste text in open documents fails. Also, copying text fails
from one application window to another application window that is running in a VDA.
[#LC2985]
User Int erf ace
If StoreFront is configured with an aggregation group and if the application name contains a backward slash ("\"),
starting applications in Receiver for Linux might fail. T he following error message appears:
"Corrupt ICA file"
[#LC1268]
T he following issues have been fixed since Version 13.0:
HDX Mediastream Windows Media Redirection
Shadowing
HDX MediaStream Flash Redirection
System Exceptions
Keyboard
Miscellaneous
Session/Connection
HDX Mediast ream Windows Media Redirect ion
T he Receiver for Linux 13.0 chooses Motion JPEG (MJPEG) output for the webcam even though YUYV output is available.
[#LA5740]
HDX MediaSt ream F lash Redirect ion
With HDX MediaStream for Flash enabled, reloading certain Flash videos in Internet Explorer might fail.
[#LA4345]
When playing a video on YouTube, audio and video might not play correctly in Internet Explorer. T his occurs when users
connect with Receiver for Linux and HDX MediaStream Flash Redirection is enabled.
[#LA5833]
If HDX Flash redirection is enabled, selecting the video size control of YouTube can cause flash redirection to fall back to
server side rendering.
[#LA5834]
Keyboard
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p.13
Pressing key combinations that include the Alt, Shift, or CT RL keys can cause those keys to remain in a down state in a
remote session.
[#LA5730]
T his fix addresses the following issue with the interpretation of the Num Lock key state:
When you move the mouse pointer out of a published application window and then back in, then press several keys on
the numerical keypad while the Num Lock key is pressed, the first key pressed on the numerical pad does not appear in
the session.
[#LC0146]
Session/Connect ion
With Client clipboard redirection enabled, copying and pasting files in a client session (for example, using seamless
published Windows Explorer) might fail.
[#LA5254]
Published application windows without a taskbar entry fail to take input focus unless another published window exists
for the same application.
[#LA5617]
When moving a seamless window, the window might not be redrawn correctly in certain scenarios.
To enable this fix, in either of the files ~/.ICAClient/wfclient.ini file or config/All_Regions.ini add the entry
"T WIRedrawAfterMove=T RUE" in the [WFClient] section.
[#LA5669]
T his fix improves the file transfer rate in low latency environments.
[#LA5725]
T he Receiver for Linux 13.0 chooses Motion JPEG (MJPEG) output for the webcam even though YUYV output is available.
[#LA5742]
DNS queries that return multiple responses for a single lookup - as is common in a round-robin configuration, can cause
secure connection attempts to fail and the Receiver to exit unexpectedly.
[#LA5752]
When restoring a window from maximization on the server, the local window is restored but the content of the window
is not correct and there is a mouse offset.
[#LA5926]
If you move a published application window launched in a seamless mode, the contents of the window might be
corrupted. To fix this issue, do the following:
On the server, set the policy "View window contents while dragging" to "Prohibited."
On the user device, in the file "$HOME/wfclient.ini", locate the section [WFClient] and add the entries
https://docs.citrix.com
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p.14
"T WICoordinateWinPosition=T rue" and "T WIRedrawAfterMove=T rue".
[#LA5935]
T he display of sessions on 7.5 VDAs subject to a Visual Display policy where the Visual qualit y setting is set to a value
other than the default (Medium) can be unresponsive from the moment they launch.
[#LC0043]
Attempts to connect to published applications or desktops through the NetScaler Gateway can fail and the following
error message appears:
Cannot contact server for application <>.
Server browser command contains an invalid parameter.
T he server name cannot be resolved.
T he issue occurs in scenarios where an additional secure ticket authority is configured both for the NetScaler Gateway
and for StoreFront.
[#LC0059]
When trying to authenticate to the Web Interface using a Kerberos ticket, a segfault can occur and pnabrowse exits
unexpectedly.
[#LC0065]
When pressing Alt+Tab to browse among open windows and to bring up the Remote Desktop logon window, the
window fails to take focus.
[#LC0069]
When the cursor is located within the boundaries of an application windows, clicking Alt+Tab can fail to bring the
window to the front.
[#LC0070]
Dragging a window in a desktop launched by the Receiver for Linux can leave a shadow behind.
[#LA0128]
T his fix prevents the occasional appearance of an unexpected and unwarranted error massage indicating a connectivity
issue and presenting users with Exit and Retry options.
[#LC0129]
UDP audio can fail unexpectedly a few minutes into the session.
[#LC0137]
XenDesktop sessions might become unresponsive when transferring data over a serial port with Receiver for Linux.
[#LC0296]
When users connect with Receiver for Linux and the thin client HP t610 running on an HP T hinPro 4.4 operating system
and if the time zone is set to GMT +8 in the following locations, the error message "Your current time zone is not
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.15
recognized" appears:
Singapore
Brunei
Makassar
Kuala Lumpur
Kuching
Manila
[#LC0299]
When switching between Microsoft Word and the Microsoft Terminal Services Client (MST SC) window, the content that
appears in the windows can be corrupt.
[#LC0308]
T he command pnabrowse -WT fails to end a desktop session.
To enable the fix, in the file $HOME/wfclient.ini, in the section [WFClient], add the entry "LogoffDesktopT hroT WI=True".
[#LC0345]
Attempts to interact with some drop-down boxes might fail when using Receiver for Linux.
[#LC0365]
Shadowing
If the resolution of the Linux client is changed and a published application is launched from the XenApp server by using
Receiver for Linux, the shadower might fail to refresh its display correctly while the session is shadowed from the
management console.
[#LA5165]
Syst em Except ions
Receiver for Linux might fail if you enable PersistentCacheSize.
[#LC0528]
Miscellaneous
Current tarball and RPM packages fail to integrate with GStreamer on recent Fedora, Red Hat, and CentOS AMD
(x86_64) distributions.
[#LA4212]
If an x.509 Public Key Infrastructure (PKI) certificate with certain policy constraints is installed on NetScaler Gateway,
launching an application by using Receiver for Linux might fail with an SSL error 85.
To start applications, you must set the following key in the All_Regions.ini file:
[Network\SSL]
EnableCertificatePolicyVerification=1
[#LA5609]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.16
T his feature enhancement adds support for SHA-2 certificates to Receiver for Linux.
[#LC0136]
HDX Mediastream Windows Media Redirection
User Experience
Keyboard
User Interface
Session/Connection
Miscellaneous
System Exceptions
HDX Mediast ream Windows Media Redirect ion
With HDX RealT ime enabled, the gst_read process can experience a slow memory leak over time as it redirects Web cam
data.
[#LA1933]
Keyboard
When connecting from the Receiver for Linux to a Windows 7 virtual desktop, the message "Caps Lock is on" on the
Windows 7 logon screen might not reflect the accurate state of the Caps Lock key on the client until a character key is
pressed.
[#LA1784]
When switching between local and published applications, the first key you press after pressing Ctrl is ignored or key
other than the one you pressed can appear.
[#LA3397]
Import ant : Installing this fix on systems with Fix #LA1965 installed causes Fix #LA1965 to no longer work. Do not install
this fix on systems where you installed and deem Fix #1965 necessary.
Hotkeys, such as the Alt-Tab key combination, can fail to get passed through to the session and are instead interpreted
by the client.
From the description of Fix #LA1965:
When connecting in non-seamless mode, the Receiver for LINUX user might come across a gray screen flashing (for
about one second) before a published desktop or application appears.
[#LA3660]
When a published application is configured to run a macro on one of the LED keys (Caps Lock, Num Lock, or Scroll Lock),
pressing the key can cause the macro to run multiple times.
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p.17
To enable this fix, add the entry "BypassSetLED=True" to the [WFClient] section of the wfclient.ini file located in the
~/.ICAClient folder. If the ~/.ICAClient folder is not present, modify the /opt/Citrix/ICAClient/nls/en/wfclient.ini file
instead.
[#LA3825]
When using the Japanese version of the Receiver for Linux in a virtual desktop session, the state of the Caps Lock key on
the IME bar can be incorrect while pressing the Shift+Eisu keys.
[#LA4072]
When using the Receiver for Linux in a virtual desktop session with the Japanese IME installed and selected on the VDA,
there can be inconsistencies between the state of the Caps Lock key on the IME bar and the endpoint while pressing
the Shift+Eisu keys.
[#LA4422]
Session/Connect ion
In a multi-monitor environment, the Receiver for Linux might set the size of a maximized window incorrectly in a
secondary monitor. As a result, the window size can be larger than the monitor size.
[#LA0663]
When launching IBM Lotus Notes with any other published application (for example, Microsoft Excel), within a session
attempts to open an attachment can cause the attachment window to be updated incorrectly, and appear on top of
other windows. T his can result in instances of other windows that appear as a black (or other background color)
rectangle.
[#LA1490]
With time zone redirection enabled, the time as displayed and applied in the session might be accurate as designed.
However, when attempting to open Date and T ime on the Control Panel, the following error message appears:
"Your current time zone is not recognized. Please select a valid time zone using the link below."
[#LA1828]
On systems with the IceWM window manager installed, the -span o command fails to span the session across two
monitors. Instead, the session is shown on just one of the monitors.
[#LA2178]
Attempts to open a file whose name contains the 5C - Yen symbol (Shift-JIS encoded) from a client-side mapped USB
device might fail.
[#LA2183]
T his fix extends the SucConnT imeout setting (http://support.citrix.com/proddocs/topic/ica-settings/ica-settingssucconntimeout.html) so that it is honored not only by published applications but also by published desktops. As a result,
multiple desktop launches wait for the number of seconds specified by the SucConnT imeout before proceeding.
To modify the SucConnT imeout value:
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.18
Edit the [WFClient] section of the ~/.ICAClient/wfclient.ini file as follows:
[WFClient]
Version=2
SucConnT imeout=60
KeyboardLayout=(User Profile)
KeyboardMappingFile=automatic.kbd
KeyboardDescription=Automatic (User Profile)
If the ~/.ICAClient/ folder is not present in the user's home directory, modify the /opt/Citrix/ICAClient/nls/en/wfclient.ini
file as shown above. T he file will be copied into the ~/.ICAClient folder when the user connects for the first time. Also,
you can add ApplySucConnT imeoutToDesktops=True to the same section as SucConnT imeout if required.
[#LA2679]
Attempts to launch a published application from the Receiver for Linux using domain credentials with Centrify might fail.
[#LA3270]
T his enhancement allows the Receiver for Linux to read and write to files on mapped client drives that use the XFS file
system.
[#LA3610]
When switching from workspace A to workspace B and back to workspace A, the focus is not restored to the last
window that had focus on that workspace.
Not e : T his fix resolves the issue for KDE, Xfce, and Gnome desktop environments. It does not work for Unity desktops.
[#LA3432]
Using pnabrowse in a multiple domain environment might fail while using an alternate domain for user authentication.
T he issue occurs because the original code implementation separates username and domain. As a result, using
pnabrowse with an alternate domain does not work.
For example, a user can be referenced as [email protected] or as [email protected] (where the primary domain is
this.company and the alternate domain is this.local). T his fix ensures that both of the following work:
> ./pnabrowse -L desk -U user1 -D this.company -P company123 <IP address>
> ./pnabrowse -L desk -U [email protected] -P company123 <IP address>
[#LA3551]
Custom virtual channels might fail to initialize after an automatic reconnect by Receiver for LINUX.
[#LA3572]
Even if the "Automatically move pointer to the default button in a dialog box" option (the feature that helps to move
the mouse pointer to the default button when a dialog box is open) is enabled on the server, the feature might fail to
work within a published application using Receiver for LINUX.
[#LA4285]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.19
T he right-hand edge and the lower portion of certain Java application windows (for example, jEdit) in seamless mode
might fail to redraw properly when moved or restored.
To enable the fix, add the entry "T WISetFocusBeforeRestore=True" in the [WFClient] section of the
$HOME/.ICAClient/wfclient.ini file.
[#LA4450]
USB device redirection can be slow in Receiver for LINUX in NetScaler deployments.
[#LA4549]
When dragging a published application window (for example, Token 2) anywhere but by its title bar, the seamless
application window might get minimized.
To enable the fix, add the entry "T WIMoveResizeHideWindowType=2" to the [WFClient] section of the wfclient.ini file.
[#LA4737]
Syst em Except ions
Setting CommPollSize=On in module.ini can cause the wfica.exe process to exit unexpectedly.
[#LA2155]
Attempts to print from a Java based application in a published desktop can cause the Receiver for Linux to exit
unexpectedly.
[#LA3321]
T he Receiver can exit unexpectedly while pasting a large amount of data from the clipboard.
[#LA3608]
T he Receiver can exit unexpectedly. T he issue can occur when a published application contains more than 50 Chinese
language characters in the title bar.
[#LA4119]
User Experience
If you press the ALT key while dragging a published application window anywhere but by its title bar, the window
contents do not move in unison with the window outline. Further, when you release the mouse button, the dragging
motion just completed repeats.
[#LA0837]
T he mouse pointer can be positioned in an incorrect location when maximizing the secondary monitor window. Menus
and buttons might be incorrectly activated while hovering the mouse pointer over them. T he issue occurs if the
secondary monitor has a smaller vertical pixel resolution than the primary monitor.
For example: Monitor 1 is set to 1920x1080 and Monitor 2 to 1280x1024 pixels. When you launch a published application
on Monitor 1 and then drag and maximize the application on Monitor 2, the mouse pointer might be positioned about
one centimeter away from any target button. As a result, a tooltip pop-up can appear for the Maximize button when
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.20
the pointer is a centimeter away from the button.
[#LA2071]
When a pop-up menu pertaining to a notification area icon of a seamless published application is dismissed, the area of
the pop-up menu is not properly redrawn and a portion of the menu content is still visible.
[#LA4139]
User Int erf ace
T his enhancement to the pnabrowse utility allows for the display of higher resolution icons for published resources.
[#LA1994]
A taskbar entry named "Untitled Window" can appear when expanding a dropdown menu in a published application.
[#LA3422]
Miscellaneous
T his is an enhancement that allows you to limit USB redirection from a given client on a per-user basis. To limit USB
direction to a specific user, run the following commands on the client as a root user or administrator:
1. Remove the setuid bit from the ctxusb binary:
# chmod u-s /opt/Citrix/ICAClient/ctxusb
2. Insert a USB device and locate the device in the file system using:
# ls – lR /dev/bus/usb
3. Assign user permissions (for example, to user1), where /dev/bus/usb/001/041 is determined to be the USB device in
Step 2:
# chown user1 /dev/bus/usb/001/041
[#LA1952]
Integrating the GStreamer (a third-party application) with the Citrix Receiver might fail for Version 12.04 of Ubuntu.
[#LA2016]
On 64-bit systems, for example the Ubuntu 64-bit distribution, the hdxcheck.sh script fails to locate the 32-bit versions
of the following libraries - libpcsclite.so, libcrypto.so, libjpeg.so, libldapsdk.so, and libcap.so, resulting in the following
warning messages:
"Warning! - libpcsclite.so missing, check that the file exists.
Warning! - libcrypto.so is not installed. T his is required if you use NT LM proxies.
Warning! - libjpeg.so is not installed! T his is needed for Speedscreen Image and Browser Acceleration.
Warning! - libldapsdk.so is not installed! T his is only needed if you use Novell Netware Services.
A compatible version of libcap could not be located!"
T he issue occurs because the script attempts to locate those libraries only under /user/lib. In 64-bit Linux distributions,
the 32-bit versions of those libraries can be installed under /usr/lib/i386-linux-gnu or /lib/i386-linux-gnu/. With this fix, the
script also attempts to locate the libraries under /lib. If the attempts are successful, the following messages appear
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.21
instead of the warning messages:
"Success! - Libpcsclite.so installed. Smartcard support enabled.
Success! All OS dependencies found!
A compatible version of libcap is installed!"
[#LA2204]
T his feature enhancement introduces support of the playbin2 open source multimedia framework on the HP T 510. To
enable playbin2 support, you must set the following options in the All_Regions.ini file:
SpeedScreenMMAClosePlayerOnEOS=True
SpeedScreenMMAEnablePlaybin2=True
[#LA2566]
T his fix addresses a number of issues found with #LA2566, a feature enhancement that introduces support of the
playbin2 open source multimedia framework on the HP T 510.
[#LA2757]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.22
Citrix Receiver for Linux 13.5 Known Issues
Mar 0 9, 20 17
T he following known issues have been observed in this release:
T he StoreFront URL fails to be added if Citrix Receiver for Linux is installed in a custom localized path that contains one
or more 4-byte characters.
[RFLNX-613]
With HDX MediaStream Windows media redirection with GStreamer1.0 enabled, OpenGL can cause unexpected pop-up
windows to appear on some platforms.
[RFLNX-949]
With HDX MediaStream Windows media redirection with GStreamer1.4 or later enabled, in Fetch mode on the server
side, some multimedia files (type MPG1, MPEG2, and H264) fail to play back.
[RFLNX-952]
On a device with CPU frequency scaling such as the Raspberry Pi, if you are experiencing stutters in audio or general
performance issues, Citrix recommends that you set the scaling governor to performance mode. T o see your current
performance governor for each core, run the following command, where <c> is the core"
cat /sys/devices/system/cpu/cpu<c>/cpufreq/scaling_governor
By default, this setting is an on-demand setting, and not always dynamic enough to provide the real-time performance
you need.
T o set the scaling governor to performance mode, run the following command as root:
echo performance > /sys/devices/system/cpu/cpu<c>/cpufreq/scaling_governor
Repeat this command for each core <c>.
[RFLNX-1003]
T he hardware-accelerated H264 decoder plug-in for the HDX Ready Pi does not operate correctly if you change the
frame buffer resolution with the framebuffer_width and framebuffer_height parameters in the /boot/config.txt file. As
a workaround, change the Pi’s resolution with the hdmi_group and hdmi_mode parameters.
[RFLNX-1049]
T he following known issues have been observed in this release:
Cannot reduce a fullscreen session to windowed mode using the Desktop Viewer toolbar when using the ‘-span o’
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.23
argument to override the session window redirect.
T o resolve this issue, do not use the ‘-span o’ option. Use a window manager with _NET _WM_FULLSCREEN_MONIT ORS
support or disable Desktop Viewer instead.
[#634855]
T he secondary session might not pop up when clicking its name under the Switch button on Desktop Viewer.
[#648716]
Receiver for Linux becomes unresponsive indefinitely when switching from X1 UI to Classic UI.
If the self-service UI displays the error "NoWebUI 0," restart the self-service process to revert the self-service UI to
normal.
[#652810]
Flash Redirection uses the wrong location with multi-monitor clients.
When using Flash Redirection on a client with multiple monitors, Flash content can appear on the wrong monitor or off
the screen. T his can be avoided by ensuring the session is running on all available monitors before attempting to use the
Flash Redirection feature.
[#653550]
Updating to this release can produce errors due to options dropped from All_Regions.ini.
[#654826]
HDX Webcam redirection is disabled for 45 seconds at startup.
T o avoid this, add an entry to the [wfclient] section of ~/.ICAClient/wfclient.ini (or $ICAROOT /config/module.ini)
HDXRT MEWebCamLaunchDelayT ime=0.
If you intend to use the RT ME plug-in instead of HDX webcam redirection, do not change this value.
T he following known issues have been observed in this release:
Citrix Receiver does not recognize the PIV smartcard when starting a desktop for the first time.
[#491235]
Unclear error messages are displayed when Citrix Receiver cannot find the server immediately after it restarts.
[#553886]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.24
An incorrect message dialog is displayed when the session reliability timer expires.
[#556899]
An error message (for example, "Unknown Error 1000047") is displayed when connecting to the VDA with the SSLv3
protocol enabled.
[#558641]
A generic network error is displayed when connecting to a StoreFront server with the SSLv3 protocol enabled.
[#558653]
Changing SharedUserMode using storebrowse, -c SharedUserMode[=value], requires exact case matching using the value
parameter. When using the value parameter for storebrowse, -c SharedUserMode[=value], you must specify an exact
case match using "T rue" or "False." No error message is displayed if an invalid value parameter is used. For example, -c
SharedUserMode=T rue.
[#559402]
When connecting to a terminal server (for example, RDS) with only the SSLv3 protocol enabled the connection fails as
expected but it might not fail with a SSL peer handshake failure.
[#567407]
Generic USB webcam input fails on 64-bit systems.
[#568556]
T he storebrowse – d command does not delete previously cleared cached store information created by self-service. T his
means that if the store is subsequently added the self-service UI loads from the previous cached state.
[#569806]
New T LS values are not applied for connections to the StoreFront server using selfservice/storebrowse when T LS values
are changed after the EULA (license) has been accepted. Note that a running AuthManager does not read a changed
T LS setting.
[#570725]
Connection Center doesn't support IPv6.
[#571743]
When specifying a negative value to an integer config entry such as
T CPRecvBufferSize in $HOME/.ICAClient/All_Regions.ini, the value is erroneously passed to WFICA as a positive value. T o
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.25
resolve this issue, use $ICAROOT /config/module.ini to set a negative value for T CPRecvBufferSize.
[#575474]
GStreamer helper processes display a warning related to a GLIB threading issue.
[#580753]
T he ARMEL browser plug-in does not work at this release.
[#588044]
If you experience problems with time zones not correctly mapping with XenApp/XenDesktop 7.6 sessions, ensure that
you have the hotfix referenced in CT X142640, and follow the steps for entry 7 [From ICAT S760WX64014]. If that does
not resolve the issue, try changing /etc/timezone (or /etc/localtime if /etc/timezone is not present) to be a symlink to a
city name under /usr/share/zoneinfo/...
If your time zone is still not supported, you might need to raise a support ticket to have a mapping added to the server.
[#LC1061, #606648]
In the Platform Optimization SDK, the plug-ins for non-X11 environments possess two issues:
Sessions to Windows servers for XenDesktop 7.x fail if session reliability is used.
Sessions with 16-bit color depth show video corruption.
T hese issues exist in both the SDL Library-based SDL_plugin and the raw kernel Framebuffer-based FB_plugin sample
plug-in implementations. Any further plug-ins developed by the user can expect to suffer these same issues.
T he following known issues have been observed in this release:
T he ARMEL browser plug-in (used for launching sessions from a web browser) fails to launch, preventing the user from
launching a session. T o resolve this, use the browser settings to disable the plug-in, which allows a fallback mechanism to
take over.
[#580782]
When running on SLED 11sp3, launching storebrowse or selfservice from a terminal might cause several programs to
produce errors saying "libidn.so.11: no version information available." T his issue has little, if any, effect on the behavior of
Citrix Receiver.
[#582512]
Flash redirection is not available on 64-bit clients. If this capability is important in your environment, contact the Citrix
Product Management team or alternately use the support forums for additional guidance.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.26
[#582627]
Receiver fails to add favorite applications when selecting Add to Favorites in the Details view. T his issue occurs when
running SuSE SLED 11sp3 without installing updates. T o avoid this issue, ensure that the package libwebkit-1_0-2 is
version 1.2.7-0.17.1 (or greater).
[#585295]
A third-party issue occurs in the EPEL 2.2.4 version of libwebkitgtk+. Citrix recommends using the EPEL (Extra Packages
for Enterprise Linux) repository as a method for getting the GT K+2 version of libwebkitgtk on RedHat 7 and Centos 7.
However, an issue with the provided EPEL version occurs when Japanese/Chinese characters are used in the hosted
application names on the server. As a result, Receiver cannot ensure a proper method for securing a stable libwebkitgtk
build on RedHat 7 and Centos 7 suitable for APAC characters.
[#586967]
On some platforms, installing the client from a tarball distribution might cause the system to hang after prompting you
to integrate with KDE and GNOME. T his issue occurs with the first time initialization of gstreamer-0.10. If you encounter
this issue, end the installation process (using ctrl+c) and run the following command: gst-inspect-0.10 -- gst-disableregistry-fork --version. After executing this command, you are able to re-run the tarball setup without experiencing a
system hang.
[#587640]
In some Gnome desktop environments, a client might experience a crash when starting the Microsoft Remote Desktop
app (Mstsc). T his issue occurs after connecting to a remote desktop. After inserting login credentials, the session cannot
be closed gracefully by clicking the 'X' symbol (an error indicating that "A problem has occurred and the system can't
recover.")
[#587922]
Windows media player displays an error message stating "Windows Media Player encountered a problem while playing
the file"; this error condition can be dismissed by closing the error message, then clicking the Play icon.
[#588009]
Windows Media Player on a Windows 7 desktop might fail to play audio/video when started from a 64-bit Receiver. T his
issue occurs due to a known issue with Ubuntu 14.04; expected GStreamer components are not being installed. See the
section "Windows Media Player fails to play files in certain formats" in the T roubleshooting topic.
[#588298]
Windows Media Player fails to play files in certain formats.
T he following known issues have been observed in this release:
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.27
A new script was added that creates client-server file type associations. T his script, ctx_app_bind, allows you to use a
published application to open a specific file type. T his script accepts either the name of the published app, either an
example file or a MIME type, and optionally allows you to include a server name or URL.
For example:
ctx_app_bind example_file published_app_name server
ctx_app_bind application/some-mime-name published_app_name
Use the – p option to use pnabrowse rather than storebrowse for the session launch.
Note: Citrix recommends using care when executing this script. It has not been tested against all possible OS
environments.
[#558649]
If a user is unable to connect to the store, you can enable connection logs on Receiver to troubleshoot the nature of
the problem. T o enable the collection of connection logs in Receiver:
1. Edit the /opt/citrix/ICAClient/config/AuthManConfig.xml with the following parameters as a user with
administrator privileges:
<!-- TracingEnabled - true, false -->
<key>TracingEnabled</key>
<value>true</value>
<!-- LoggingMode - none, normal, verbose -->
<key>LoggingMode</key>
<value>verbose</value>
2. Halt the following processes: AuthManagerDaemon, selfservice, ServiceRecord, storebrowse.
3. Start Receiver and connect to the store.
4. Check the logs under $HOME/.ICAClient/logs.
HDX RealT ime Webcam Video Compression requires:
- A Video4Linux compatible Webcam
- GStreamer 0.10.25 (or a later 0.10.x version), including the distribution's "plugins-good" package
[#559817]
When using Linux Receiver X1 to remove an app, the app persists and when logging out and returning to the store.
[#561719]
T he following known issues have been observed in this release:
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.28
You cannot disconnect or log off virtual desktops from Connection Center. T he Disconnect button is unavailable and
the Log off button does not work. T o work around this issue, disconnect or log off from the desktop session, not
Connection Center. T his issue is not observed with virtual applications.
[#423651, #424847]
An error appears if a user opens the self-service UI to connect to the StoreFront store, and then closes the Receiver for
Linux window when the Authentication Manager dialog box is open.
[#430193]
Receiver for Linux does not allow connection to a non-secure StoreFront store (http://). Depending on the
configuration of the store, the user will either receive an error message of the form, "Error: Cannot retrieve discovery
document" [], or the initial connection will be made over HT T P, but further communications will switch to https.
Alternatively, if you use the IP address for the hostname you might see errors referring to Citrix XenApp Services
(formerly PNAgent). Either explicitly use https:// or do not prefix the server name with http:// when entering the URL.
[#473027, #478667 and #492402]
Receiver for Linux does not support logging on with a smart card that contains multiple authentication certificates.
[#488614]
If Receiver for Linux gives a segmentation fault when accessing smart cards, this might be due to a problem with the
PKCS#11 library. You can check the library with the pkcs11-tool utility. T he pkcs11-tool utility is part of the opensc
package. An example test is:
pkcs11-tool --module /usr/lib/libgtop11dotnet.so If this also gives a segmentation fault, you must contact the supplier of the driver. You can also try a driver from another
source for the same type of card. T his problem has been seen with the Gemalto .NET driver included in Fedora 19 and
Fedora 20.
[#493172]
Receiver for Linux supports multiple card readers; however only one smart card can be used at a time.
[#494524]
T he host name of the Linux machine must be 20 characters or less for connections to work. T his setting can be
examined and set by using the hostname command. Any user can examine the hostname, but to set the hostname, you
need to be the root user or have administrator privileges.
[#494740]
When working with XenDesktop in full screen mode in Receiver for Linux 13.x, the local screensaver might not activate.
T his is a third-party issue, and the behavior might vary depending on the client operating system.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.29
[#496398]
If you insert the wrong smart card when trying to connect to a StoreFront store, you might see an error message such
as "protocol error" or "Specified store not found," which does not explain the issue.
[#496904]
On some low-performance devices in a full screen session, the logon process with smart card authentication might take
longer than expected and a timeout occurs. You might be able to prevent this issue by disabling use of H264. T o disable
the use of H624, do the following:
1. Open the wfclient.ini file.
2. Locate the "T hinwire3.0" section.
3. Add the entry "H264Enabled=False".
T his issue has been seen on a machine based on armhf (ARM hard float), without hardware accelerated H264.
[#497720]
If a PNAgent server allows the user to change expired passwords by contacting the Domain controller directly, you can
only do this with the MIT compatible version of the library, libkcpm.so. T his is due to issues with the Heimdal compatible
version. T his restriction applies to x86, armel and x64 (which uses the x86 pnabrowse). It does not apply to armhf.
[#498037]
Receiver for Linux requires libpng12.so, however this is not normally available in the standard repositories for Fedorabased systems. In this case, please find a suitable RPM for your system on the internet. For openSUSE, libpng12.so is
available, however it must be installed separately.
[#501937]
A hotfix for 12.1 added a pnabrowse exit code E_SSLSDK_PASSWORD_LOCKED with the value 220. T his changed the
exit code E_PASSWORD_EXPIRED to 239 from its documented value of 238. In 13.0, the value for
E_SSLSDK_PASSWORD_LOCKED was changed to 240, restoring the correct value of E_PASSWORD_EXPIRED.
However, the values listed by pnabrowse -errno still show the uncorrected meanings for values 220 to 240.
[#502550]
T he following known issues have been observed in this release:
Inst allat ion issues
libxerces-c 3.1 is a required component for this release. However, it is not available in some Linux distributions that use
RPM packaging. If this component is missing in your distribution, locate it on a suitable website and add it to your Linux
system installation.
[#384324]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.30
For platforms that cannot meet the libxerces or libwebkitgtk system requirement (or both requirements), you can install
Receiver using the tarball package, or force the installation of the Debian or RPM packages, and use the browser-based
Receiver for web to start connections. For example, you cannot install the RPM package on CentOS systems because it
requires libwebkitgtk-1.0.so.0, which is not available in those environments. T o work around this issue, install the package
with --nodeps or --force, or use the T arball package instead. T hen launch a browser and enter the URL to your Receiver
for web store.
[#426176]
You can use the RPM package to install Receiver on the 32-bit version of OpenSUSE 13.1, but it fails at runtime. T o work
around this issue, download and install the following RPM package first, and repeat the installation:
ftp://rpmfind.net/linux/opensuse/factory/repo/oss/suse/i586/libpng12-0-1.2.50-7.3.i586.rpm.
[#429879]
After installing Receiver from the 64-bit RPM package in a 64-bit Fedora 19.1 environment, you must perform additional
steps before using pnabrowse or the client engine, wfica, to launch connections. (T hese steps do fix storebrowse and
selfservice, which cannot be made to function due to limitations in the version of curl in this environment.) T o work
around this issue:
1. Install the 32-bit libpng12 package using the following command:
yum install libpng12.i686
2. T o minimize the number of audio errors, install the 32-bit ALSA plug-in using the following command:
yum install alsa-plugins-pulseaudio.i686
3. T o minimize the number of GtK errors, install the following packages using the following commands:
yum install adwaita-gtk2-theme.i686
yum install PackageKit-gtk3-module.i686
yum install libcanberra-gtk2.i686
4. T o allow connections to be started from Firefox, install the plug-in nspluginwrapper.i686 and register it with the web
browser using the following commands:
yum install nspluginwrapper.i686
mozilla-plugin-config
[#429886]
General issues
Resuming audio playback might be noisy. T he noise is present only when the audio is paused and then restarted, not
when it is first played. T his has been observed with XenDesktop connections involving the Remote PC Access feature.
T here is no workaround for this issue.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.31
[#308772]
Some media types only play on the user device if the appropriate codec is available on the server even though GStreamer
should be able to connect directly to the source of the media and play it using the decoders on the device. T here is no
workaround for this issue.
[#339394]
On Ubuntu 12.04 with the Gnome 3 desktop, notification area icons for published applications do not integrate with the
native desktop. Instead, they appear in a separate notification area window. T here is no workaround for this issue.
[#395140]
Linux users cannot use their email addresses to set up StoreFront stores. Users should instead add the URL of the
required stores using the Accounts page of the Preferences dialog box. You can alternatively provide a provisioning file
with account information that is used to create a new account.
[#395394]
Proxy support for the selfservice and storebrowse commands is not available by default. T o use a proxy server with a
StoreFront server, set the http_proxy environment variable before starting either command. Use the following format
for the environment variable:
<server_name>.<domain>[:<port>]
[#403729]
Client-to-server content redirection (dropping published content on to a desktop icon) does not work with the selfservice user interface. T here is no workaround for this issue.
[#403739]
T he Security-Enhanced Linux (SELinux) security module in RedHat Fedora can affect the operation of the Client Drive
Mapping and USB Redirection features (on both XenApp and XenDesktop). If you require either or both of these
features, disable SELinux before configuring them on the server.
[#413554]
T he HDX MediaStream Flash Redirection feature has not been tested on the ARM hard float (armhf) platform because,
in this release, Receiver does not work with Flash plug-ins on that platform.
[#414253]
If you configure a webcam frame rate that is not supported by the webcam, it defaults to a different value, which might
be higher than expected.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.32
[#414576]
If, in Receiver, you set a non-default resolution for a webcam, it does not stream video the first time you use it with
Citrix GoT oMeeting. T he webcam appears to be active and gst_read is running, but no image is displayed. T o work
around this issue, stop and restart the webcam in GoT oMeeting.
[#414878]
If window decorations are not present in the desktop environment (for example, in the LXDE environment with
decorations disabled), you might not be able to close self-service dialog boxes.
[#416689]
With some versions of XenApp or XenDesktop, after starting a desktop or application, you cannot check the server
name used for a connection because no server is listed in Connection Center. T o work around this issue, click Properties.
T he server name is displayed in the Properties dialog.
[#417114]
If, while logging on to Receiver, you enter your credentials after a delay of about five minutes, the self-service user
interface (UI) does not display your applications. T o work around this issue, select Refresh Apps from the drop-down
menu in the UI and re-enter your credentials.
[#417564]
An administrator who shadows a user's session might notice display errors if their screen is smaller than that of the user
device. For example, scrollbars might not fit on to the administrator's screen, and regions of the user's screen might be
inaccessible. T here is no workaround for this issue. In addition, resizing the shadowed session from the administrator's
machine can black out the session on the user device. T o work around this issue, click the Restore button in the session
window on the administrator's machine (not the user device).
[#418672, #418690]
T he self-service user interface and associated StoreFront components (Authentication Manager and the Service Record
daemon) are not supported on Fedora because of library incompatibilities. Receiver installs without errors but does not
work after installation. T o work around this issue, start Receiver through web Interface (a legacy component) or web
Receiver.
[#419662]
When many applications or desktops are subscribed to, the self-service user interface (UI) includes a scrollbar. T his
disappears (as expected) when the UI is resized to show all the application and desktop icons. However, the scrollbar is
not redisplayed when the UI is then reduced in size. T his issue has been observed only on Ubuntu 13.04. T o work around
it, click the Refresh menu option, repeat the resizing operation a few times, or stop and restart Receiver.
[#422520]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.33
T he first time a connection is made, you might notice a delay that varies significantly depending on the network. A
connection using 3G will likely be slower than a connection using ADSL.
[#423663]
When you enter an HT T PS store address in the self-service user interface (UI), the following error message is displayed if
no certificate is present: "Your account cannot be added using this server address. Ensure you enter it correctly." T his
error is displayed if the address is correct but no certificate is present. T o work around this issue, install a certificate.
[#423757, #424674]
You can apply a XenDesktop policy to raise the maximum frame rate in Receiver sessions above 30 frames per second
(FPS). However, this value is not honored and the frame rate in the sessions never exceeds this value because it is limited
by the flow control feature. T his issue has been observed in XenDesktop 7 and 7.1. T o work around this issue, disable
flow control.
[#423950]
T o switch accounts (and access desktops and applications from a different store), you use the Accounts menu in the
self-service user interface. T his might not be obvious to users.
[#424027]
If you use storebrowse in multiple locales that are not encoded as UT F-8, some of the text in the logon dialog box might
be corrupt. For example, in a Spanish locale there is no text on the Log on button. T o work around this issue, switch to a
UT F-8 locale (for example, by creating a wrapper script around storebrowse, and the Service Record and Authentication
Manager daemon executables).
[#424052]
You cannot disconnect or log off virtual desktops from Connection Center. T he Disconnect button is unavailable and
the Log off button does not work. T o work around this issue, disconnect or log off from the desktop session, not
Connection Center. T his issue is not observed with virtual applications.
[#424847]
When storebrowse is used to start a session to a virtual desktop in a group in which all desktops are turned off, an exit
status value of 255 EXEC_FAILED is displayed (sometimes after a delay), indicating that the start has failed. However,
instead of failing, the desktop is in fact starting or registering and will be available soon. T o work around this issue, advise
users who encounter it to try starting the desktop again, or ensure any startup script does likewise.
[#425076, #425103]
In the Japanese and Simplified Chinese versions of Receiver, keyboard shortcuts do not work in some dialog boxes.
[#425275, #425278, #425281, #425332]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.34
In the German, French, and Spanish versions of Receiver running on the Ubuntu platform, keyboard shortcuts are not
visible in some dialog boxes but they are functional.
[#425282, #425285, #425289, #425294, #425339]
In the German version of Receiver, duplicate keyboard shortcuts are present in some dialog boxes.
[#425284, #425338]
T he openssl tool c_rehash is used to import and hash root certificates that are used to secure communications with
StoreFront. Some versions of c_rehash do not correctly handle certificates that contain MS-DOS-style line endings. If
the output from c_rehash does not generate symbolic links for your certificate, you might need to convert the line
endings to UNIX format. You can do this using the following tr command line:
tr -d '\r' < root_certificate_name.pem > new_root_certificate_name.pem
T hen, run the c_rehash script against the new root certificate created from this command.
[#425775]
On Debian platforms, the ctxusbd daemon does not restart when the system restarts, causing USB redirection to fail.
T his is because the init script, /etc/init.d/ctxusbd, contains a variable, ###INIT _UDEV###, which must expand to udev.
T o work around this issue, edit /etc/init.d/ctxusbd as follows. You must have root permissions to do so:
sed -ie's,###INIT _UDEV###,udev,g' /etc/init.d/ctxusbd
T hen, manually rerun insserv (again, with root permissions):
/sbin/insserv /etc/init.d/ctxusbd
T his issue has only been observed on Debian platforms.
[#425810]
When connecting to Program Neighborhood Agent sites, absent or expired certificates might cause the Receiver user
interface to flash, prompt the user repeatedly for credentials, or consume high CPU. T o work around this issue, Citrix
recommends installing your certificates properly and maintaining them regularly. T he issue is not observed when
connecting to StoreFront sites.
[#425848]
Icons in the self-service user interface might not be displayed when new users search for applications or desktops. T o
work around this issue, click Refresh Apps.
[#426364]
When using pnabrowse to connect to an HT T PS-secured Program Neighborhood Agent site on some Microsoft Server
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.35
2012 servers in armhf (hard float) environments, a generic error message is displayed and the connection fails. T his issue is
not fully defined but might be because the servers have a FQDN ending in .local, or because the key size specified in the
Public Key field of the certificate on the servers is 2,048 Bits not 1,024 Bits. T his issue does not occur with storebrowse
and has only been observed in armhf environments.
[#426420]
If you log off from Receiver (by clicking Log Off in the self-service user interface) but then try to connect to a desktop
or application, and cancel when prompted for your credentials, the message "Cannot process request" is displayed. You
can ignore the message. You were successfully logged off.
[#426424]
A segmentation fault occurs, and Receiver fails, when you use the self-service user interface for the first time to
connect to a Program Neighborhood Agent site, click Cancel in the logon dialog box, click Refresh Apps, and close the
Receiver window. T here is no workaround for this issue.
[#426625]
Multiple processes that call data store or load procedures at the same time can lead to data loss in files that are in
memory (for example, StoreCache.xml). T he last change to a given file is preserved; earlier changes are lost. T here is no
danger of file corruption.
[#426692]
If you remove and then add a store, the Accounts page of the Preferences dialog box does not show the new store
until you close and reopen the dialog box.
[#426735]
With the Reconnect apps and desktops preference set to When I start or refresh apps and with a connection to a
desktop or application in progress, selecting Refresh Apps from the Receiver menu makes the user interface unresponsive
until the connection is established.
[#426761]
No error message is displayed when you try to add a store or gateway that is already listed in Receiver. T here is no
workaround for this issue, but no duplicate entries are created and the existing store or gateway continues to function
correctly.
[#427379]
Menus in published applications disappear when they are clicked. T his has been observed with maximized application
windows in GNOME 3 desktop environments on Ubuntu 12.04 but not in Unity environments on Ubuntu 12.04.3.
[#429686]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.36
Caution: A limitation in Windows means that the volume level of audio is maximized when a session automatically
reconnects after a network outage. T here is no workaround for this issue.
[#430160]
Receiver preferences only affect new or reconnected sessions, not disconnected ones. For example, you can start Citrix
GoT oMeeting from a virtual desktop and then disconnect from the desktop session (but not GoT oMeeting). You can
then select Use my microphone and webcam on the Mic & Webcam page of the Preferences dialog box, but this does
not start the webcam in the GoT oMeeting session. T o work around this issue, close and restart the affected session (in
the example, this is the GoT oMeeting session).
[#430692]
If selfservice is run from a terminal, and the terminal is closed before selfservice is, the standard quit signal is sent to all
foreground processes hosted by the terminal. Other Linux Receiver processes such as the Service Record and
Authentication Manager daemons do not ignore this signal but selfservice does. T his can make selfservice unresponsive
because the processes on which it relies are ended. T o work around this issue, start the daemons using storebrowse in
one window, and then, in a second window, run selfservice. T his lets you close the terminal window running selfservice
but the daemons continue to operate in the background, and the user interface remains responsive.
[#430697]
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.37
System requirements
Mar 0 6, 20 17
Linux kernel version 2.6.29 or later, with glibcxx 3.4.15 or later, glibc 2.11.3 or later, gtk 2.20.1 or later, libcap1 or libcap2, and
udev support.
For the self-service user interface (UI):
libwebkit or libwebkitgtk 1.0
libxml2 2.7.8
libxerces-c 3.1
ALSA (libasound2), Speex, and Vorbis codec libraries.
At least 55 MB of free disk space for the installed version of Receiver and at least 110 MB if you expand the installation
package on the disk. You can check the available disk space by typing the following command in a terminal window:
df -k
At least 1 GB RAM for system-on-a-chip (SoC) devices that use HDX MediaStream Flash Redirection.
256 color video display or higher.
T CP/IP networking.
H.264
For x86 devices, processor speeds of at least 1.6 GHz display single-monitor sessions well at typical resolutions (for example,
1280 x 1024). If you use the HDX 3D Pro feature, a native hardware accelerated graphics driver and a minimum processor
speed of 2 GHz are required.
For ARM devices, a hardware H.264 decoder is required for both general H.264 support and HDX 3D Pro. Performance also
benefits from faster processor clock speeds.
HDX MediaSt ream F lash Redirect ion
For all HDX MediaStream Flash Redirection requirements, see CT X134786.
Citrix recommends testing with the latest plug-in before deploying a new version to take advantage of the latest
functionality and security-related fixes.
HDX RealT ime Webcam Video Compression
HDX RealT ime Webcam Video Compression requires:
A Video4Linux compatible Webcam
GStreamer 0.10.25 (or a later 0.10.x version), including the distribution's "plugins-good" package.
Or GStreamer 1.0 (or a later 1.x version), including the distribution's “plugins-base,” “plugins-good,” “plugins-bad,” “pluginsugly,” and “gstreamer-libav” packages.
HDX MediaSt ream Windows Media Redirect ion
HDX MediaStream Windows Media Redirection requires:
GStreamer 0.10.25 (or a later 0.10.x version), including the distribution's "plugins-good" package; in general, version 0.10.15
or later is sufficent for HDX MediaStream Windows Media Redirection.
Or GStreamer 1.0 (or a later 1.x version), including the distribution's “plugins-base,” “plugins-good,” “plugins-bad,” “plugins-
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.38
ugly,” and “gstreamer-libav” packages.
Note: If GStreamer is not included in your Linux distribution, you can download it from http://gstreamer.freedesktop.org.
Use of certain codes (for example, those in "plugins-ugly") might require a license from the manufacturer of that
technology. You must consult with your corporate legal department to determine whether the codes you plan to use
require additional licenses.
P hilips SpeechMike
If you plan to use Philips SpeechMike devices with Receiver, you might need to install the relevant drivers on the user device.
Visit the Philips web site for information and software downloads.
Smart card support
T o configure smart card support in Citrix Receiver for Linux, you must have the StoreFront services site configured to allow
smart card authentication.
Note: Smart cards are not supported with the XenApp Services site for Web Interface configurations (formerly known as PNAgent),
or with the "legacy PNAgent" site that can be provided by a StoreFront server.
Citrix Receiver for Linux supports smart card readers that are compatible with PCSC-Lite and smart cards with PKCS#11
drivers for the appropriate Linux platform. By default Receiver for Linux now locates opensc-pkcs11.so in one of the
standard locations. To ensure Receiver for Linux finds either opensc-pkcs11.so in a non-standard location or another
PKCS#11 driver, store the location in a configuration file using the following steps:
1. Locate the configuration file: $ICAROOT /config/AuthManConfig.xml
2. Locate the line <key>PKCS11module</key> and add the driver location to the <value> element immediately following
the line.
Note: If you enter a file name for the driver location, Receiver navigates to that file in the$ICAROOT /PKCS#11 directory.
Alternatively, you can use an absolute path beginning with "/".
To configure the behavior of Citrix Receiver for Linux when a smart card is removed, update theSmartCardRemovalAction in
the configuration file using the following steps:
1. Locate the configuration file: $ICAROOT /config/AuthManConfig.xml
2. Locate the line <key>SmartCardRemovalAction</key> and add 'noaction' or 'forcelogoff' to the<value> element
immediately following the line.
T he default behaviour is 'noaction'. No action is taken to clear credentials stored and tokens generated with regards to the
smart card on the removal on the smart card. T he 'forcelogoff ' action clears all credentials and tokens within StoreFront on
the removal of the smart card.
XenApp: All versions currently supported by Citrix. For more information, see the Citrix product matrix.
XenDesktop: All versions currently supported by Citrix. For more information, see the Citrix product matrix.
VDI-in-a-Box: All versions currently supported by Citrix. For more information, see the Citrix product matrix.
You can use Citrix Receiver for Linux 13.5 browser-based access in conjunction with StoreFront Receiver for Web and
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.39
Web Interface, with - or without - the NetScaler Gateway plug-in.
StoreFront:
StoreFront 3.x, 2.6, 2.5 and 2.1
Provides direct access to StoreFront stores.
StoreFront configured with a Citrix Receiver for Web site
Provides access to StoreFront stores from a web browser. For the limitations of this deployment, refer to "Important
considerations" in Receiver for Web sites.
Web Interface in conjunction with the NetScaler VPN client:
Web Interface 5.4 for Windows web sites.
Provides access to virtual desktops and apps from a Web browser.
Web Interface 5.4 for Linux with XenApp Services or XenDesktop Services sites
Ways to deploy Citrix Receiver to users:
Enable users to download from receiver.citrix.com, then configure using an email or services address in conjunction
with StoreFront.
Offer to install from Citrix Receiver for Web site (configured with StoreFront).
Offer to install Receiver from Citrix Web Interface 5.4.
Citrix recommends that you use the latest version of Mozilla Firefox or Google Chrome.
Note: For information on changes to Google Chrome NPAPI support, see Citrix blog article, Preparing for NPAPI being
disabled by Google Chrome.
Citrix Receiver for Linux supports HT T PS and ICA-over-T LS connections through any one of the following configurations.
For LAN connections:
StoreFront using StoreFront services or Citrix Receiver for Web sites
Web Interface 5.4 for Windows, using Web Interface or XenApp Services sites
For secure remote or local connections:
Citrix NetScaler Gateway 11.1
Citrix NetScaler Gateway 11.0
Citrix NetScaler Gateway 10.5
Citrix NetScaler Gateway 10.1
Citrix Access Gateway Enterprise Edition 10
Citrix Access Gateway Enterprise Edition 9.x
Citrix Access Gateway VPX
For information about the NetScaler Gateway and Access Gateway versions supported by StoreFront, see StoreFront
system requirements.
Not e : References to NetScaler Gateway in this topic also apply to Access Gateway, unless otherwise indicated.
About secure connections and certificates
Not e : For additional information about security certificates, refer to topics under Secure connections and Secure
communications.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.40
P rivat e (self-signed) cert ificat es
If a private certificate is installed on the remote gateway, the root certificate for the organization's certificate authority
must be installed on the user device to successfully access Citrix resources using Receiver.
Not e : If the remote gateway's certificate cannot be verified upon connection (because the root certificate is not included
in the local keystore), an untrusted certificate error appears. T he root certificate needs to be installed in the clients
certificate store.
Inst alling root cert ificat es on user devices
For information about installing root certificates on user devices as well as configuring Web Interface for certificate use,
see Secure Receiver communication.
Wildcard cert ificat es
Wildcard certificates are used in place of individual server certificates for any server within the same domain. Citrix Receiver
for Linux supports wildcard certificates, however they should only be used in accordance with your organization's security
policy. In practice, alternatives to wildcard certificates, such as a certificate containing the list of server names within the
Subject Alternative Name (SAN) extension, could be considered. Such certificates can be issued by both private and public
certificate authorities.
Int ermediat e cert ificat es and t he Net Scaler Gat eway
If your certificate chain includes an intermediate certificate, the intermediate certificate must be appended to the
NetScaler Gateway server certificate. For information, see Configuring Intermediate Certificates.
Although you do not need to log on as a privileged (root) user to install the Citrix Receiver for Linux, USB support is enabled
only if you are logged on as a privileged user when installing and configuring Receiver. Installations performed by nonprivileged users will, however, enable users to access published resources using either StoreFront through one of the
supported browsers or using Receiver's native UI.
Citrix provides a script, hdxcheck.sh, as part of the Receiver installation package. T he script checks whether your device
meets all of the system requirements in order to benefit from all of the functionality in Receiver for Linux. T he script is
located in the Utilities directory of the installation package.
T o run t he hdxcheck.sh script
1. Open a terminal window.
2. T ype cd $ICAROOT /util and press ENT ER to navigate to the Utilities directory of the installation package.
3. T ype ./hdxcheck.sh to run the script.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.41
Install and set up
Mar 0 9, 20 17
T he following packages are available for Citrix Receiver for Linux. You can access the packages from the download section
of the Citrix website.
Package name
Cont ent s
Debian packages (Ubunt u, Debian, Linux Mint et c.)
icaclient_13.5.0.10185126_amd64.deb
Self-service support, 64-bit x86_64
icaclient_13.5.0.10185126_i386.deb
Self-service support, 32-bit x86
icaclient_13.5.0.10185126_armhf.deb
Self-service support, ARM HF
icaclient_13.5.0.10185126_armel.deb
Self-service support, ARM EL
icaclientWeb_13.5.0.10185126_amd64.deb
Web Receiver only, 64-bit x86_64
icaclientWeb_13.5.0.10185126_i386.deb
Web Receiver only, 32-bit x86
icaclientWeb_13.5.0.10185126_armhf.deb
Web Receiver only, ARM HF
icaclientWeb_13.5.0.10185126_armel.deb
Web Receiver only, ARM EL
ctxusb_2.7.10185126_amd64.deb
USB package, 64-bit x86_64
ctxusb_2.7.10185126_i386.deb
USB package, 32- bit x86
ctxusb_2.7.10185126_armhf.deb
USB package, ARM HF
ctxusb_2.7.10185126_armel.deb
USB package, ARM EL
Redhat packages (Redhat , SUSE, F edora et c.)
ICAClient-rhel-13.5.0.10185126-0.x86_64.rpm
Self-service support, RedHat (including Linux VDA)
based, 64-bit x86_64
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.42
ICAClient-rhel-13.5.0.10185126-0.i386.rpm
Self-service support, RedHat based, 32-bit x86
ICAClientWeb-rhel-13.5.0.10185126-0.x86_64.rpm
Web Receiver only, RedHat based, 64-bit
x86_64
ICAClientWeb-rhel-13.5.0.10185126-0.i386.rpm
Web Receiver only, RedHat based, 32-bit x86
ICAClient-suse-13.5.0.10185126-0.x86_64.rpm
Self-service support, SUSE based, 64-bit x86_64
ICAClient-suse-13.5.0.10185126-0.i386.rpm
Self-service support, SUSE based, 32-bit x86
ICAClient-suse11sp3-13.5.0.10185126-0.x86_64.rpm
Self-service support, SUSE 11 sp3 (including Linux
VDA) based, 64-bit x86_64
ICAClient-suse11sp3-13.5.0.10185126-0.i386.rpm
Self-service support, SUSE 11 sp3 based, 32-bit
x86
ICAClientWeb-suse-13.5.0.10185126-0.x86_64.rpm
Web Receiver only, SUSE based, 64-bit x86_64
ICAClientWeb-suse-13.5.0.10185126-0.i386.rpm
Web Receiver only, SUSE based, 32-bit x86
ctxusb-2.7.10185126-1.x86_64.rpm
USB package, 64-bit x86_64
ctxusb-2.7.10185126-1.i386.rpm
USB package, 32-bit x86
T arballs (Script inst all f or any dist ribut ion)
linuxx64-13.5.0.10185126.tar.gz
64-bit Intel
linuxx86-13.5.0.10185126.tar.gz
32-bit Intel
linuxarmhf-13.5.0.10185126.tar.gz
ARM EL
linuxarm-13.5.0.10185126.tar.gz
ARM HF
T he difference between packages that offer support for Web Receiver and those that support self-service is that the
latter packages include dependencies required for self-service in addition to those needed for the Web Receiver.
Dependencies for self-service are a superset of those required for Web Receiver, but the files installed are identical.
If you require only Web Receiver support, or your distribution doesn’t have the necessary packages to support self-service,
install the Web Receiver only package.
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.43
If your distribution allows, install Citrix Receiver from the Debian package or RPM package. T hese files are generally easier to use
because they automatically install any required packages. If you want to control the installation location, install Citrix Receiver from
the tarball package.
If you are installing Receiver from the Debian package on Ubuntu, you might find it convenient to open the packages in the
Ubuntu Software Center.
In the following instructions, replace packagename with the name of the package that you are installing.
T his procedure uses a command line and the native package manager for Ubuntu/Debian/Mint. You can also install the
package by double-clicking the downloaded .deb package in a file browser. T his typically starts a package manager that
downloads any missing required software. If no package manager is available, Citrix recommends gdebi, a command-line
tool that performs this function.
T o install the package using the command line
1. Log on as a privileged (root) user.
2. Open a terminal window.
3. Run the installation for the following 3 packages by typing gdebi packagename.deb . For example:
gdebi icaclient_13.4.0.10109380_amd64.deb
gdebi icaclientWeb_13.4.0.10109380_amd64.deb
gdebi ctxusb_2.7.10109380_amd64.deb
Not e : To use dpkg in the above examples, replace “gdebi” with “dpkg -i”.
A user must install the icaclient package or the icaclientWeb package. T he ctxusb package is optional, providing support for
Generic USB Redirection.
4. If using dpkg, install any missing dependencies by typing sudo apt -get -f inst all.
5. Accept the EULA.
If you are installing Citrix Receiver from the RPM package on SUSE, use the YaST or Zypper utility, not the RPM utility. T he
RPM utility does not download or install any necessary dependencies, it only installs the .rpm package. If the required
dependencies are missing, you will receive an error.
Not e : T o follow an example of an installation using a RPM package, see the Citrix Blog article "Installing Citrix Receiver for
Linux 13.2.1 on SUSE Linux Enterprise Desktop."
In the following instructions, replace packagename with the name of the package that you are installing.
Not e : If you receive an error indicating that the installation “… requires libwebkitgtk-1.0.so.0” on Red Hat based
https://docs.citrix.com
© 1999-2017 Citrix Systems, Inc. All rights reserved.
p.44
distributions (RHEL, CentOS, Fedora, etc.) add the EPEL repository (details can be found at
https://fedoraproject.org/wiki/EPEL), which can provide the missing package, or switch to the Web variant of the package.
To set up the EPEL repository on Red Hat
1. Download the appropriate source RPM package from here:
https://fedoraproject.org/wiki/EPEL#How_can_I_use_these_extra_packages.3
2. For example, for Red Hat Enterprise 7.x:
yum localinst all epel-release-lat est -7 .noarch.rpm
T ip : RPM Package Manager does not install any missing required software. To download and install the software, Citrix
recommends using zypper inst all <file name> at a command line on OpenSUSE or yum localinst all <filename> on
Fedora/Red Hat.
After setting up the EPEL repository, install Receiver from the RPM package
1. Log on as a privileged (root) user.
2. Run the installation for the following 3 packages by typing zypper in packagename.rpm.
Not e: A user must install the icaclient package or the icaclientWeb package. T he ctxusb package is an optional, providing
support for Generic USB Redirection.
3. Open a terminal window.
For SUSE installations:
zypper in ICAClient-suse-13.4.0.10109380-0.x86_64.rpm
zypper in ICAClient-suse-13.4.0.10109380-0.i386.rpm
zypper in ctxusb-2.7.10109380-1.x86_64.rpm
For Red Hat installations:
yum localinstall ICAClient-rhel-13.4.0.10109380-0.i386.rpm
yum localinstall ICAClientWeb-rhel-13.4.0.10109380-0.i386.rpm
yum localinstall ctxusb-2.7.10109380-1.i386.rpm
4. Accept the EULA.
T o inst all Cit rix Receiver f or Linux f rom a t arball package
Not e : T he tarball package does not perform dependency checking or installation of dependencies. All system dependencies
will need to be resolved separately.
1. Open a terminal window.
2. Decompress the .tar.gz file and extract the contents into an empty directory. For example type: tar
xvfz packagename.tar.gz.
3. T ype ./set upwf c and then press Enter to run the setup program.
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4. Accept the default of 1 (to install the Receiver) and press Enter.
5. T ype the path and name of the required installation directory and then press Enter, or press Enter to install Receiver in
the default location.
T he default directory for privileged (root) user installations is /opt/Citrix/ICAClient.
T he default directory for non-privileged user installations is $HOME/ICAClient/platform. Platform is a system-generated
identifier for the installed operating system. For example, $HOME/ICAClient/linuxx86 for the Linux/x86 platform).
Not e : If you specify a non-default location, set it in $ICAROOT in $HOME/.profile or $HOME/.bash_profile.
6. When prompted to proceed, type y and then press Enter.
7. You can choose whether to integrate Receiver into your desktop environment. T he installation creates a menu
option from which users can start Receiver. Type y at the prompt to enable the integration.
8. If you have previously installed GStreamer, you can choose whether to integrate GStreamer with Receiver and so
provide support for HDX Mediastream Multimedia Acceleration. To integrate Receiver with GStreamer, type y at the
prompt.
Not e : On some platforms, installing the client from a tarball distribution may cause the system to hang after prompting
you to integrate with KDE and GNOME. T his issue occurs with the first time initialization of gstreamer-0.10. If you
encounter this issue, terminate the installation process (using ctrl+c) and run the command gst -inspect -0.10 -- gst disable-regist ry-f ork --version . After executing this command, you can re-run the tarball setup without experiencing a
system hang.
9. If you log on as a privileged user (root), choose to install USB support for XenDesktop and XenApp published VDI
applications. Type y at the prompt to install USB support.
Not e : If you are not logged on as a privileged user (root), the following warning appears: "USB support cannot be installed
by non-root users. Run the installer as root to access this install option".
10. When the installation is complete, the main installation menu appears again. To exit from the setup program,
type 3 and then press Enter.
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Customize a Citrix Receiver for Linux installation
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You can customize a configuration before installation by modifying the contents of the Citrix Receiver package and then
repackaging the files. Your changes will be included in every version installed using the modified package.
1. Expand the Citrix Receiver package file into an empty directory. T he package file is called
platform.major.minor.release.build.tar.gz (for example, linuxx86.13.2.0.nnnnnn.tar.gz for the Linux/x86 platform).
2. Make the required changes to the Citrix Receiver package. For example, you might add a new T LS root certificate to the
package if you want to use a certificate from a Certificate Authority that is not part of the standard Receiver
installation. T o add a new T LS root certificate to the package, see
— Install root certificates on user devices
in the Citrix Product Documentation site. For more information about built-in certificates, see
— Configure and enable SSL and TLS
on the Citrix Product Documentation site.
3. Open the PkgID file.
4. Add the following line to indicate that the package was modified: MODIFIED=traceinfo where traceinfo is information
indicating who made the change and when. T he exact format of this information is not important.
5. Save and close the file.
6. Open the package file list, platform/platform.psf (for example, linuxx86/linuxx86.psf for the Linux/x86 platform).
7. Update the package file list to reflect the changes you made to the package. If you do not update this file, errors can
occur when installing your new package. Changes could include updating the size of any files you modified, or adding
new lines for any files you added to the package. T he columns in the package file list are:
File type
Relative path
Sub-package (which must always be set to cor)
Permissions
Owner
Group
Size
8. Save and close the file.
9. Use the tar command to rebuild Receiver package file, for example: tar czf ../newpackage.tar.gz * where newpackage is
the name of the new Receiver package file.
https://docs.citrix.com
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Start Citrix Receiver for Linux
Mar 0 6, 20 17
You can start Citrix Receiver either at a terminal prompt or from one of the supported desktop environments.
If Citrix Receiver was not installed in the default installation directory, ensure that the environment variable ICAROOT is set
to point to the actual installation directory.
T he following instruction does not apply to installations made from the Web packages, or where the tarball is used but where the
requirements for selfservice have not been met.
At the terminal prompt, type /opt/Citrix/ICAClient/selfservice and press Enter (where /opt/Citrix/ICAClient is the directory in
which you installed Citrix Receiver).
You can start Citrix Receiver from a desktop environment for Linux by navigating to it using a file manager.
On some desktops, you can also start Citrix Receiver from a menu. Receiver is located in different menus depending on your
Linux distribution.
https://docs.citrix.com
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Use Citrix Receiver for Linux as an ICA-to-X proxy
Mar 0 6, 20 17
You can use a workstation running Citrix Receiver as a server and redirect the output to another X11-capable device. You
might want to do this to deliver Microsoft Windows applications to X terminals or to UNIX workstations for which Citrix
Receiver is not available.
Citrix Receiver software is available for many X devices, and installing the software on these devices is the preferred solution in
these cases. Running Citrix Receiver in this way, as an ICA-to-X proxy, is also referred to as server-side ICA.
When you run Citrix Receiver, you can think of it as an ICA-to-X11 converter that directs the X11 output to your local Linux
desktop. However, you can redirect the output to another X11 display. T his means that you can run multiple copies of Citrix
Receiver simultaneously on one system with each sending its output to a different device.
T his graphic shows a system with Citrix Receiver for Linux set up as an ICA-to-X proxy:
To set up this type of system, you need a Linux server to act as the ICA-to-X11 proxy:
If you have X terminals already, you can run Citrix Receiver on the Linux server that usually supplies the X applications to
the X terminals.
If you want to deploy UNIX workstations for which Citrix Receiver is not available, you need an extra server to act as the
proxy. T his can be a PC running Linux.
Applications are supplied to the final device using X11, using the capabilities of the ICA protocol. By default, you can use
drive mapping only to access the drives on the proxy. T his is not a problem if you are using X terminals (which usually do not
have local drives). If you are delivering applications to other UNIX workstations, you can either:
NFS mount the local UNIX workstation on the workstation acting as the proxy, then point a client drive map at the NFS
mount point on the proxy.
Use an NFS-to-SMB proxy such as SAMBA, or an NFS client on the server such as Microsoft Services for UNIX.
Some features are not passed to the final device:
USB redirection
Smart card redirection
COM port redirection
Audio will not be delivered to the X11 device, even if the server acting as a proxy supports audio.
Client printers are not passed through to the X11 device. You need to access the UNIX printer from the server manually
using LPD printing, or use a network printer.
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Redirection of multimedia input is not expected to work because it requires a webcam on the machine running Citrix
Receiver, which is the server acting as a proxy. However, redirection of multimedia output works with GStreamer installed
on the server acting as a proxy (untested).
1. Use ssh or telnet to connect to the device acting as the proxy.
2. In a shell on the proxy device, set the DISP LAY environment variable to the local device. For example, in a C shell, type:
setenv DISPLAY <local:0>
Note: If you use the command ssh -X to connect to the device acting as the proxy, you do not need to set the
DISP LAY environment variable.
3. At a command prompt on the local device, type xhost <proxy server name>
4. If Receiver is not installed in the default installation directory, ensure that the environment variable ICAROOT is set to
point to the actual installation directory.
5. Locate the directory where Citrix Receiver is installed. At a command prompt, type selfservice &
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To uninstall Citrix Receiver for Linux
Mar 0 6, 20 17
T his procedure has been tested with the tarball package. Remove the RPM and Debian packages using your operating
system's standard tools.
T he environment variable ICAROOT must be set to the installation directory of the client. T he default directory for nonprivileged user installations is $HOME/ICAClient/platform. T he platform variable is a system-generated identifier for the
installed operating system. For example, $HOME/ICAClient/linuxx86 for the Linux/x86 platform. Privileged user installation
defaults to /opt/Citrix/ICAClient.
1. Run the setup program by typing $ICAROOT/setupwfc and press Enter.
2. T o remove the client, type 2 and press Enter.
To uninstall Citrix Receiver for Linux you must be logged in as the same user who performed the installation.
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Connect
Mar 0 6, 20 17
Citrix Receiver provides users with secure, self-service access to virtual desktops and applications, and on-demand access to
Windows, web, and Software as a Service (SaaS) applications. Citrix StoreFront or legacy webpages created with Web
Interface manage the user access.
T he Citrix Receiver home page displays virtual desktops and applications that are available to users based on their account
settings (that is, the server they connect to) and settings configured by Citrix XenDesktop or Citrix XenApp administrators.
Using the Preferences > Accounts page, users can perform that configuration themselves by entering the URL of a
StoreFront server or, if email-based account discovery is configured, by entering their email address.
If you use the same name for multiple stores on the StoreFront server, you avoid duplications by adding numbers. T he names for
such stores depend on the order in which they are added. For PNAgent, the store URL is displayed and uniquely identifies the store.
After connecting to a store, self-service shows the tabs: FAVORIT ES, DESKTOPS, and APPS. To launch a session, click the
appropriate icon. To add an icon to FAVORIT ES, click the “Details” link next to the icon and select “Add To Favorites.”
You can configure a number of default settings for connections between Citrix Receiver and XenApp and XenDesktop
servers. You can also change those settings for individual connections, if required.
T he rest of this section contains procedures that support typical tasks performed by users of Citrix Receiver. Although the
tasks and responsibilities of administrators and users can overlap, the term “user” is employed in this section to distinguish
typical user tasks from those typically performed by administrators.
Connect to resources from a command line or browser
T roubleshoot connections to resources
Customize Receiver using configuration files
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Connect to resources from a command line or
browser
Mar 0 6, 20 17
You create connections to servers when you click on a desktop or application icon on the Receiver home page. In addition,
you can open connections from a command line or from a web browser.
As a prerequisite, ensure the store is known to Citrix Receiver. If necessary, add it using the following command:
./util/storebrowse --addstore <store URL>
1. Obtain the unique ID of the desktop or application that you want to connect to. T his is the first quoted string on a line
acquired in one of the following commands:
List all of the desktops and applications on the server:
./util/storebrowse -E <store URL>
List the desktops and applications that you have subscribed to:
./util/storebrowse -S <store URL>
2. Run the following command to start the desktop or application:
./util/storebrowse –L <desktop or application ID> <store URL>
If you cannot connect to a server, your administrator might need to change the server location or SOCKS proxy details. For
more information, see Connect through a proxy server.
Configuration for starting sessions from a web browser is typically carried out automatically during installation. Note that
because of the wide variety of browsers and operating systems, some manual configuration can be required.
If you need to set up .mailcap and MIME files for Firefox, Mozilla, or Chrome manually, use the following file modifications
so that .ica files start up the Receiver executable, wfica. To use other browsers, you need to modify the browser
configuration accordingly.
1. Run the following commands for non-administrator installation of Citrix Receiver. T he settings of ICAROOT might be
changed if they are installed to a non-default location. You can test the result with the command “xdg-mime query
default application/x-ica,” which must return “wfica.desktop.”
setenv ICAROOT =/opt/Citrix/ICAClient
xdg-icon-resource install --size 64 “$ICAROOT /icons/000_Receiver_64.png Citrix-Receiver”
xdg-mime default wfica.desktop application/x-ica
xdg-mime default new_store.desktop application/vnd.citrix.receiver.configure
2. Create or extend the file /etc/xdg/mimeapps.list (for administrator installation) or
$HOME/.local/share/applications/mimeapps.list (mimeapps.list). T he file must start with [Default Applications], and
follow by:
application/x-ica=wfica.desktop;
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application/vnd.citrix.receiver.configure=new_store.desktop;
Note that you might need to configure Firefox on its Preferences/Applications setting page. For "Citrix ICA settings file
content,” select “Citrix Receiver Engine (default)” in the pull-down menu. Or select “Use other ...” and then select the file
/usr/share/applications/wfica.desktop (for an administrator installation of Receiver) or
$HOME/.local/share/applications/wfica.desktop (for a non-administrator installation).
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Troubleshoot connections to resources
Mar 0 6, 20 17
Users can manage their active connections using the Connection Center. T his feature is a useful productivity tool that
enables users and administrators to troubleshoot slow or problematic connections. With Connection Center, users can
manage connections by:
Closing an application.
Logging off a session. T his ends the session and closes any open applications.
Disconnecting from a session. T his cuts the selected connection to the server without closing any open applications
(unless the server is configured to close applications on disconnection).
Viewing connection transport statistics.
1. On the Receiver menu, click Connection Center.
T he servers that are used are shown and, for each server, the active sessions are listed.
2. Do one of the following:
Select a server, and disconnect from it, log off from it, or view properties of it.
Select an application, and close the window it is displayed in.
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Customize using configuration files
Mar 0 6, 20 17
About t he configurat ion files
To change advanced or less common settings, you can modify Receiver's configuration files. T hese configuration files are
read each time wfica starts. You can update various files depending on the effect you want the changes to have.
Be aware that, if session sharing is enabled, an existing session might be used instead of a newly reconfigured one. T his
might cause the session to ignore changes you made in a configuration file.
Apply def ault t o all Cit rix Receiver users
If you want to change the default for all Citrix Receiver users, modify the module.ini configuration file in the
$ICAROOT /config directory.
You do not need to add an entry to All_Regions.ini for a configuration value to be read from module.ini, unless you want to allow
other configuration files to override the value in module.ini. If an entry in All_Regions.ini sets a specific value, the value in module.ini
is not used.
Apply changes t o new Cit rix Receiver users
If the $HOME/.ICAClient/wfclient.ini file does not exist, wfica creates it by copying $ICAROOT /config/wfclient.template.
When you make changes to this template file, they apply to all future new Citrix Receiver users.
Apply changes t o all connect ions f or part icular users
If you want the changes to apply to all connections for a particular user, modify the wfclient.ini file in that user’s
$HOME/.ICAClient directory. T he settings in this file apply to future connections for that user.
Validat e configurat ion file ent ries
If you want to limit the values for entries in wfclient.ini, you can specify allowe options or ranges of options in
All_Regions.ini. If you specify only one possible value, that value is used. Note that $HOME/.ICAClient/All_Regsions.ini can
only match or reduce the possible values set by $ICAROOT /config/All_Regions.ini, it cannot take away restrictions. See the
All_Regions.ini file in the $ICAROOT /config directory for more information.
If an entry appears in more than one configuration file, a value in wfclient.ini takes precedence over a value in module.ini.
About t he paramet ers in t he files
T he parameters listed in each file are grouped into sections. Each section begins with a name in square brackets indicating
parameters that belong together; for example, [ClientDrive] for parameters related to client drive mapping (CDM).
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Defaults are automatically supplied for any missing parameters except where indicated. If a parameter is present but is not
assigned a value, the default is automatically applied; for example, if InitialProgram is followed by an equal sign (=) but no
value, the default (not to run a program after logging in) is applied.
P recedence
All_Regions.ini specifies which parameters can be set by other files. It can restrict values of parameters or set them exactly.
For any given connection, the files are generally checked in the following order:
1. All_Regions.ini. Values in this file override those in:
T he connection's .ica file
wfclient.ini
2. module.ini. Values in this file are used if they have not been set in All_Regions.ini, the connection's .ica file, or wfclient.ini
but they are not restricted by entries in All_Regions.ini.
If no value is found in any of these files, the default in the Receiver code is used.
T here are exceptions to this order of precedence. For example, the code reads some values specifically from wfclient.ini for
security reasons, to ensure they are not set by a server.
https://docs.citrix.com
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Configure Citrix XenApp (formerly PNAgent)
connections using Web Interface
Mar 0 6, 20 17
T his topic applies only to deployments using either XenApp Services on Web Interface or "legacy PNAgent" on StoreFront.
Options such as selfservice, storebrowse, and pnabrowse enable users to connect to published resources (that is, published
applications, and server desktops) through a server running a XenApp Services site. T hese programs can launch connections
directly or can be used to create menu items through which users can access published resources. pnabrowse can also
create desktop items for this purpose.
Customizable options for all users running Citrix XenApp on your network are defined in a configuration file, config.xml,
which is stored on the Web Interface server. When a user starts one of these programs, it reads the configuration data
from the server. After that, it updates its settings and user interface periodically, at intervals specified in the config.xml file.
Important
T he config.xml file affects all connections defined by the XenApp Services site.
A XenApp Services site may also publish a file, rather than an application or desktop. T his process is referred to as publishing
content, and allows pnabrowse to open the published file.
T here is a limitation to the type of files that are recognized by Receiver. For the system to recognize the file type of the
published content and for users to view it through Receiver, a published application must be associated with the file type of
the published file. For example, to view a published Adobe PDF file using Receiver, an application such as Adobe PDF Viewer
must be published. Unless a suitable application is published, users cannot view the published content.
https://docs.citrix.com
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Optimize
Mar 0 6, 20 17
By optimizing your environment you gain the best performance from Citrix Receiver and provide the best user experience.
You can improve and optimize performance by:
Mapping user devices
Configuring USB support
Improving performance over low-bandwidth connections
Improving multimedia performance
Optimizing the performance of screen tiles
Citrix Receiver supports client device mapping for connections to XenApp and XenDesktop servers. Client device mapping
enables a remote application running on the server to access devices attached to the local user device. T he applications
and system resources appear to the user at the user device as if they are running locally. Ensure that client device mapping
is supported on the server before using these features.
Not e : T he Security-Enhanced Linux (SELinux) security model can affect the operation of the Client Drive Mapping and USB
Redirection features (on both XenApp and XenDesktop). If you require either or both of these features, disable SELinux
before configuring them on the server.
Mapping client drives
Client drive mapping allows drive letters on the XenApp or XenDesktop server to be redirected to directories that exist on
the local user device. For example, drive H in a Citrix user session can be mapped to a directory on the local user device
running Receiver.
Client drive mapping can make any directory mounted on the local user device, including a CD-ROM, DVD or a USB memory
stick, available to the user during a session, provided the local user has permission to access it. When a server is configured
to allow client drive mapping, users can access their locally stored files, work with them during their session, and then save
them again either on a local drive or on a drive on the server.
T wo types of drive mapping are available:
Static client drive mapping enables administrators to map any part of a user device's file system to a specified drive letter
on the server at logon. For example, it can be used to map all or part of a user's home directory or /tmp, as well as the
mount points of hardware devices such as CD-ROMs, DVDs, or USB memory sticks.
Dynamic client drive mapping monitors the directories in which hardware devices such as CD-ROMs, DVDs and USB
memory sticks are typically mounted on the user device and any new ones that appear during a session are automatically
mapped to the next available drive letter on the server.
When Citrix Receiver connects to XenApp or XenDesktop, client drive mappings are reestablished unless client device
mapping is disabled. You can use policies to give you more control over how client device mapping is applied. For more
information see the XenApp and XenDesktop documentation.
Users can map drives using the Preferences dialog box. For information on this, see Set preferences.
Note: By default, enabling static client drive mapping also enables dynamic client drive mapping. T o disable the latter but
enable the former, set DynamicCDM to False in wfclient.ini.
https://docs.citrix.com
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Mapping client printers
Citrix Receiver supports printing to network printers and printers that are attached locally to user devices. By default, unless
you create policies to change this, XenApp lets users:
Print to all printing devices accessible from the user device
Add printers
T hese settings, however, might not be the optimum in all environments. For example, the default setting that allows users
to print to all printers accessible from the user device is the easiest to administer initially, but might create slower logon
times in some environments. In this situation, you may wish to limit the list of printers configured on the user device.
Likewise, your organization’s security policies might require that you prevent users from mapping local printing ports. To do
so, on the server configure the ICA policy Auto connect client COM ports setting to Disabled.
To limit t he list of print ers configured on t he user device
1. Open the configuration file, wfclient.ini, in one of the following:
$HOME/.ICAClient directory to limit the printers for a single user
$ICAROOT /config directory to limit the printers for all Receiver users— all users in this case being those who first use
the selfservice program after the change.
2. In the [WFClient] section of the file type:
ClientPrinterList=printer1:printer2:printer3
where printer1, printer2 and so on are the names of the chosen printers. Separate printer name entries by a colon (:).
3. Save and close the file.
Mapping client printers on XenApp for Windows
T he Citrix Receiver for Linux supports the Citrix PS Universal Printer Driver. So, in most cases no local configuration is required
for users to print to network printers or printers that are attached locally to user devices. You may, however, need to
manually map client printers on XenApp for Windows if, for example, the user device’s printing software does not support
the universal printer driver.
To map a local print er on a server
1. From Citrix Receiver, start a server connection and log on to a computer running XenApp.
2. On the Start menu, click Settings > Printers.
3. On the File menu, click Add Printer.
T he Add Printer wizard appears.
4. Use the wizard to add a network printer from the Client Network, Client domain. In most cases, this will be a standard
printer name, similar to those created by native Remote Desktop Services, such as "HP LaserJet 4 from clientname in
session 3".
For more information about adding printers, see your Windows operating system documentation.
Mapping client printers on XenApp for UNIX
In a UNIX environment, printer drivers defined by Citrix Receiver are ignored. T he printing system on the user device must be
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able to handle the print format generated by the application.
Before users can print to a client printer from Citrix XenApp for UNIX, printing must be enabled by the administrator. For
more information, see the XenApp for UNIX section in the XenApp and XenDesktop documentation.
Mapping client audio
Client audio mapping enables applications executing on the XenApp server or XenDesktop to play sounds through a sound
device installed on the user device. You can set audio quality on a per-connection basis on the server and users can set it on
the user device. If the user device and server audio quality settings are different, the lower setting is used.
Client audio mapping can cause excessive load on servers and the network. T he higher the audio quality, the more
bandwidth is required to transfer the audio data. Higher quality audio also uses more server CPU to process.
You configure client audio mapping using policies. For more information, see the XenApp and XenDesktop documentation.
Note: Client audio mapping is not supported when connecting to Citrix XenApp for UNIX.
To set a non-def ault audio device
T he default audio device is typically the default ALSA device configured for your system. Use the following procedure to
specify a different device:
1. Choose and open a configuration file according to which users you want your changes to affect. See Customize
Receiver using configuration files for information about how updates to particular configuration files affect different
users.
2. Add the following option, creating the section if necessary:
[ClientAudio]
AudioDevice = <device>
where device information is located in the ALSA configuration file on your operating system.
Note: T he location of this information is not standard across all Linux operating systems. Citrix recommends consulting your
operating system documentation for more details about locating this information.
USB support enables users to interact with a wide range of USB devices when connected to a virtual desktop. Users can
plug USB devices into their computers and the devices are redirected to their virtual desktop. USB devices available for
remoting include flash drives, smartphones, PDAs, printers, scanners, MP3 players, security devices, and tablets.
USB redirection requires either XenApp 7.6 (or later) or XenDesktop. Note that XenApp does not support USB redirection of
mass storage devices and requires special configuration to support audio devices. Refer to XenApp 7.6 documentation for
details.
Isochronous features in USB devices such as webcams, microphones, speakers, and headsets are supported in typical low
latency/high speed LAN environments, although in most cases the standard audio or webcam redirection are more suitable.
T he following types of device are supported directly in a XenDesktop session, and so do not use USB support:
Keyboards
Mice
Smart cards
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Headsets
Webcams
Note: Specialist USB devices (for example, Bloomberg keyboards and 3D mice) can be configured to use USB support. For
information on configuring policy rules for other specialist USB devices, see CT X 119722.
By default, certain types of USB devices are not supported for remoting through XenDesktop. For example, a user may
have a network interface card attached to the system board by internal USB. Remoting this would not be appropriate. T he
following types of USB device are not supported by default for use in a XenDesktop session:
Bluetooth dongles
Integrated network interface cards
USB hubs
To update the default list of USB devices available for remoting, edit the usb.conf file, located in $ICAROOT /. For more
information, see Update the list of USB devices available for remoting.
To allow the remoting of USB devices to virtual desktops, enable the USB policy rule. For more information, see the
XenDesktop documentation.
How USB support works
When a user plugs in a USB device, it is checked against the USB policy, and, if allowed, redirected to the virtual desktop. If
the device is denied by the default policy, it is available only to the local desktop.
For desktops accessed through desktop appliance mode, when a user plugs in a USB device, that device is automatically
redirected to the virtual desktop. T he virtual desktop is responsible for controlling the USB device and displaying it in the
user interface.
T he session window must have focus when the user plugs in the USB device for redirection to occur, unless desktop
appliance mode is in use.
Mass storage devices
If a user disconnects from a virtual desktop when a USB mass storage device is still plugged in to the local desktop, that
device is not redirected to the virtual desktop when the user reconnects. To ensure the mass storage device is redirected to
the virtual desktop, the user must remove and re-insert the device after reconnecting.
Note: If you insert a mass storage device into a Linux workstation that has been configured to deny remote support for
USB mass storage devices, the device will not be accepted by the Receiver software and a separate Linux file browser may
open. T herefore, Citrix recommends that you pre-configure user devices with the Browse removable media when inserted
setting cleared by default. On Debian-based devices, do this using the Debian menu bar by selecting Desktop > Preferences
> Removable Drives and Media, and on the Storage tab, under Removable Storage, clear the Browse removable media when
inserted check box.
Note: If the Client USB device redirection server policy is turned on, mass storage devices are always directed as USB devices
even if client drive mapping is turned on.
Webcams
By default, optimum webcam performance is provided by HDX RealT ime Webcam Video Compression. In some
circumstances, however, you may require users to connect webcams using USB support. To do this, you must disable HDX
RealT ime Webcam Video Compression. For more information see, Configure HDX RealT ime webcam video compression
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USB classes allowed by default
T he following classes of USB device are allowed by the default USB policy rules:
Audio (Class 01)
Includes microphones, speakers, headsets, and MIDI controllers.
P hysical Int erf ace (Class 05)
T hese devices are similar to HIDs, but generally provide real-time input or feedback and include force feedback joysticks,
motion platforms, and force feedback exoskeletons.
St ill Imaging (Class 06)
Includes digital cameras and scanners. Digital cameras often support the still imaging class which uses the Picture Transfer
Protocol (PT P) or Media Transfer Protocol (MT P) to transfer images to a computer or other peripheral. Cameras may also
appear as mass storage devices and it may be possible to configure a camera to use either class, through setup menus
provided by the camera itself.
Note that if a camera appears as a mass storage device, client drive mapping is used and USB support is not required.
P rint ers (Class 07 )
In general most printers are included in this class, although some use vendor-specific protocols (class ff). Multi-function
printers may have an internal hub or be composite devices. In both cases the printing element generally uses the Printers
class and the scanning or fax element uses another class; for example, Still Imaging.
Printers normally work appropriately without USB support.
Mass St orage (Class 08)
T he most common mass storage devices are USB flash drives; others include USB-attached hard drives, CD/DVD drives, and
SD/MMC card readers. T here are a wide variety of devices having internal storage which also present a mass storage
interface; these include media players, digital cameras, and mobile phones. Known subclasses include:
01 Limited flash devices
02 T ypically CD/DVD devices (AT API/MMC-2)
03 T ypically tape devices (QIC-157)
04 T ypically floppy disk drives (UFI)
05 T ypically floppy disk drives (SFF-8070i)
06 Most mass storage devices use this variant of SCSI
Mass storage devices can often be accessed through client drive mapping, and so USB support is not required.
Important: Some viruses are known to propagate actively using all types of mass storage. Consider carefully whether or not
there is a business need to permit the use of mass storage devices, either through client drive mapping, or USB support. T o
reduce this risk, the server may be configured to prevent files being executed through client drive mapping.
Cont ent Securit y (Class 0d)
Content security devices enforce content protection, typically for licensing or digital rights management. T his class includes
dongles.
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P ersonal Healt hcare (Class 0f )
T hese devices include personal healthcare devices such as blood pressure sensors, heart rate monitors, pedometers, pill
monitors, and spirometers.
Applicat ion and Vendor Specific (Classes f e and f f )
Many devices use vendor specific protocols or protocols not standardized by the USB consortium, and these usually appear
as vendor-specific (class ff).
USB device classes denied by default
T he following classes of USB device are denied by the default USB policy rules:
Communicat ions and CDC Cont rol (Classes 02 and 0a)
Includes modems, ISDN adapters, network adapters, and some telephones and fax machines.
T he default USB policy does not allow these devices, because one of them may be providing the connection to the virtual
desktop itself.
Human Int erf ace Devices (Class 03)
Includes a wide variety of both input and output devices. Typical Human Interface Devices (HIDs) are keyboards, mice,
pointing devices, graphic tablets, sensors, game controllers, buttons, and control functions.
Subclass 01 is known as the boot interface class and is used for keyboards and mice.
T he default USB policy does not allow USB keyboards (class 03, subclass 01, protocol 1), or USB mice (class 03, subclass 01,
protocol 2). T his is because most keyboards and mice are handled appropriately without USB support and it is normally
necessary to use these devices locally as well remotely when connecting to a virtual desktop.
USB Hubs (Class 09)
USB Hubs allow extra devices to be connected to the local computer. It is not necessary to access these devices remotely.
Smart card (Class 0b)
Smart card readers include contactless and contact smart card readers, and also USB tokens with an embedded smart card
equivalent chip.
Smart card readers are accessed using smart card remoting and do not require USB support.
Video (Class 0e)
T he video class covers devices that are used to manipulate video or video-related material, such as webcams, digital
camcorders, analog video converters, some television tuners, and some digital cameras that support video streaming.
By default, optimum webcam performance is provided by HDX RealT ime Webcam Video Compression.
Wireless Cont rollers (Class e0)
Includes a wide variety of wireless controllers, such as ultra wide band controllers and Bluetooth.
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Some of these devices may be providing critical network access, or connecting critical peripherals such as Bluetooth
keyboards or mice.
T he default USB policy does not allow these devices. However, there may be particular devices it is appropriate to provide
access to using USB support.
Updating the list of USB devices available for remoting
You can update the range of USB devices available for remoting to desktops by editing the list of default rules contained in
the usb.conf file located on the user device in $ICAROOT /.
You update the list by adding new policy rules to allow or deny USB devices not included in the default range. Rules created
by an administrator in this way control which devices will be offered to the server. T he rules on the server will then control
which of these will be accepted.
T he default policy configuration for disallowed devices is:
DENY: class=09 # Hub devices
DENY: class=03 subclass=01 # HID Boot device (keyboards and mice)
DENY: class=0b # Smartcard
DENY: class=e0 # Wireless Controllers
DENY: class=02 # Communications and CDC Control
DENY: class=03 # UVC (webcam)
DENY: class=0a # CDC Data
ALLOW: # Ultimate fallback: allow everything else
Creating USB policy rules
T ip: When creating new policy rules, refer to the USB Class Codes, available from the USB web site at http://www.usb.org/
Policy rules in usb.conf on the user device take the format {ALLOW:|DENY:} followed by a set of expressions based on
values for the following tags:
T ag
Descript ion
VID
Vendor ID from the device descriptor
REL
Release ID from the device descriptor
PID
Product ID from the device descriptor
Class
Class from either the device descriptor or an interface descriptor
SubClass
SubClass from either the device descriptor or an interface descriptor
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T ag
Descript ion
Prot
Protocol from either the device descriptor or an interface descriptor
When creating new policy rules, be aware of the following:
Rules are case-insensitive.
Rules may have an optional comment at the end, introduced by "#". A delimiter is not required and the comment is
ignored for matching purposes.
Blank and pure comment lines are ignored.
Whitespace used as a separator is ignored, but cannot appear in the middle of a number or identifier. For example, Deny:
Class=08 SubClass=05 is a valid rule; Deny: Class=0 8 Sub Class=05 is not.
T ags must use the matching operator "=". For example, VID=1230.
Example
T he following example shows a section of the usb.conf file on the user device. For these rules to be implemented, the same
set of rules must exist on the server.
ALLOW: VID=1230 PID=0007 # ANOther Industries, ANOther Flash Drive
DENY: Class=08 SubClass=05 # Mass Storage Devices
DENY: Class=0D # All Security Devices
Configure start-up modes
Using desktop appliance mode, you can change how a virtual desktop handles previously attached USB devices. In the
WfClient section in the file $ICAROOT /config/module.ini on each user device, set DesktopApplianceMode = Boolean as
follows.
T RUE
Any USB devices that are already plugged in start-up provided the device is not disallowed with a Deny rule in
the USB policies on either the server (registry entry) or the user device (policy rules configuration file).
FALSE
No USB devices start up.
Citrix recommends that you use the latest version of XenApp or XenDesktop on the server and Receiver on the user device.
If you are using a low-bandwidth connection, you can make a number of changes to your Receiver configuration and the
way you use Receiver to improve performance.
Conf igure your Receiver connect ion - Configuring your Receiver connections can reduce the bandwidth that ICA
requires and improve performance
Change how Receiver is used - Changing the way Receiver is used can also reduce the bandwidth required for a highperformance connection
Enable UDP audio - T his feature can maintain consistent latency on congested networks in Voice-over-IP (VoIP)
connections
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Use t he lat est versions of XenApp and Receiver f or Linux - Citrix continually enhances and improves performance
with each release, and many performance features require the latest Receiver and server software
Configuring connections
On devices with limited processing power or where limited bandwidth is available, there is a trade-off between performance
and functionality. Users and administrators can choose an acceptable mixture of rich functionality and interactive
performance. Making one or more of these changes, often on the server not the user device, can reduce the bandwidth
that a connection requires and can improve performance:
Enable SpeedScreen Lat ency Reduct ion - SpeedScreen Latency Reduction improves performance over high latency
connections by providing instant feedback to the user in response to typed data or mouse clicks. Use SpeedScreen
Latency Reduction Manager to enable this feature on the server. By default, in Receiver, this is disabled for keyboard and
only enabled for the mouse on high latency connections. See the
— Citrix Receiver for Linux OEM's Reference Guide
.
Enable dat a compression - Data compression reduces the amount of data transferred across the connection. T his
requires additional processor resources to compress and decompress the data, but it can increase performance over lowbandwidth connections. Use Citrix Audio Quality and Image Compression policy settings to enable this feature.
Reduce t he window size - Change the window size to the minimum that is comfortable. On the XenApp Services site
set the Session Options.
Reduce t he number of colors - Reduce the number of colors to 256. On the XenApp Services site set the Session
Options.
Reduce sound qualit y - If audio mapping is enabled, reduce the sound quality to the minimum setting using the Citrix
Audio quality policy setting.
Enabling UDP audio
UDP audio can improve the quality of phone calls made over the Internet. It uses User Datagram Protocol (UDP) instead of
Transmission Control Protocol (TCP).
Note the following:
UDP audio is not available in encrypted sessions (that is, those using T LS or ICA Encryption). In such sessions, audio
transmission uses T CP.
T he ICA channel priority can affect UDP audio.
1. Set the following options in the ClientAudio section of module.ini:
Set EnableUDPAudio to T rue. By default, this is set to False, which disables UDP audio.
Specify the minimum and maximum port numbers for UDP audio traffic using UDPAudioPortLow and
UDPAudioPortHigh respectively. By default, ports 16500 to 16509 are used.
2. Set client and server audio settings as follows so that the resultant audio is of a medium quality (that is, not high or low).
Audio quality on client
High
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High
Medium
Low
High
Medium
Low
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Audio quality on server
Medium
Medium
Medium
Low
Low
Low
Low
Low
If UDP audio is enabled but the resultant quality is not medium, audio transmission will use TCP not UDP.
Changing how Receiver is used
ICA technology is highly optimized and typically does not have high CPU and bandwidth requirements. However, if you are
using a very low-bandwidth connection, consider the following to preserve performance:
Avoid accessing large f iles using client drive mapping . When you access a large file with client drive mapping, the
file is transferred over the server connection. On slow connections, this may take a long time.
Avoid print ing large document s on local print ers . When you print a document on a local printer, the print file is
transferred over the server connection. On slow connections, this may take a long time.
Avoid playing mult imedia cont ent . Playing multimedia content uses a lot of bandwidth and can cause reduced
performance.
T he Receiver includes a broad set of technologies that provide a high-definition user experience for today's media-rich user
environments. T hese improve the user experience when connecting to hosted applications and desktops, as follows:
HDX MediaStream Windows Media Redirection
HDX MediaStream Flash Redirection
HDX RealT ime Webcam Video Compression
H.264 support
HDX Mediastream Windows Media Redirection overcomes the need for the high bandwidths required to provide multimedia
capture and playback on virtual Windows desktops accessed from Linux user devices. Windows Media Redirection provides
a mechanism for playing the media run-time files on the user device rather than on the server, thereby reducing the
bandwidth requirements for playing multimedia files.
Windows Media Redirection improves the performance of Windows Media player and compatible players running on virtual
Windows desktops. A wide range of file formats are supported, including:
Advanced Systems Format (ASF)
Motion Picture Experts Group (MPEG)
Audio-Video Interleaved (AVI)
MPEG Audio Layer-3 (MP3)
WAV sound files
Citrix Receiver includes a text-based translation table, MediaStreamingConfig.tbl, for translating Windows-specific media
format GUIDs into MIME types GStreamer can use. You can update the translation table to do the following:
Add previously unknown or unsupported media filters/file formats to the translation table
Block problematic GUIDs to force fall-back to server-side rendering.
Add additional parameters to existing MIME strings to allow for troubleshooting of problematic formats by changing a
stream's GStreamer parameters
Manage and deploy custom configurations depending on the media file types supported by GStreamer on a user device.
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With client-side fetching, you can also allow the user device to stream media directly from URLs of the form http://, mms://,
or rtsp:// rather than streaming the media through a Citrix server. T he server is responsible for directing the user device to
the media, and for sending control commands (including Play, Pause, Stop, Volume, Seek), but the server does not handle
any media data. T his feature requires advanced multimedia GStreamer libraries on the device.
To implement HDX MediaStream Windows Media Redirection
1. Install GStreamer 0.10, an open-source multimedia framework, on each user device that requires it. T ypically, you install
GStreamer before you install Citrix Receiver to to allow the installation process to configure Citrix Receiver to use it.
Most Linux distributions include GStreamer. Alternatively, you can download GStreamer from
http://gstreamer.freedesktop.org.
2. T o enable client-side fetching, install the required GStreamer protocol source plugins for the file types that users will play
on the device. You can verify that a plugin is installed and operational using the gst-launch utility. If gst-launch can play
the URL, the required plugin is operational. For example, run gst-launch-0.10 playbin2 uri=http://examplesource/file.wmv and check the video plays correctly.
3. When installing Citrix Receiver on the device, select the GStreamer option if you are using the tarball script (this is done
automatically for the .deb and .rpm packages).
Note about the client-side fetching feature:
By default, this feature is enabled. You can disable it using the SpeedScreenMMACSFEnabled option in the Multimedia
section of All-Regions.ini. With this option set to False, Windows Media Redirection is used for media processing.
By default, all MediaStream features use the GStreamer playbin2 protocol. You can revert to the earlier playbin protocol
for all MediaStream features except Client-Side Fetching, which continues to use playbin2, using the
SpeedScreenMMAEnablePlaybin2 option in the Multimedia section of All-Regions.ini.
Receiver does not recognize playlist files or stream configuration information files such as .asx or .nsc files. If possible,
users must specify a standard URL that does not reference these file types. Use gst-launch to verify that a given URL is
valid.
Note about GStreamer 1.0:
By default, GStreamer 0.10 is used for HDX MediaStream Windows media redirection. GStreamer 1.0 is used only when
GStreamer 0.10 is not available.
If you want to use GStreamer 1.0, follow the instructions below:
1. Find the install directory of the GStreamer plug-ins. Depending on your distribution, the OS architecture, and the way
you install GStreamer, the installation location of the plug-ins varies. T he typical installation path is /usr/lib/x86_64-linuxgnu/gstreamer-1.0 or $HOME/ .local/share/gstreamer-1.0.
2. Find the install directory of Citrix Receiver for Linux. T he default directory for privileged (root) user installations is
/opt/Citrix/ICAClient. T he default directory for non-privileged user installations is $HOME/ICAClient/platform (where
platform can be linuxx64, for example). For more information, see Install and set up.
3. Install libgstflatstm1.0.so by making a symbolic link in the GStreamer plug-ins directory: ln -sf
$ICACLIENT _DIR/util/libgstflatstm1.0.so $GST _PLUGINS_PAT H/libgstflatstm1.0.so. T his step might require elevated
permissions, with sudo, for example.
4. Use gst_play1.0 as the player: ln -sf $ICACLIENT _DIR/util/gst_play1.0 $ICACLIENT _DIR/util/gst_play. T his step might
require elevated permissions, with sudo, for example.
If you want to use GStreamer 1.0 in HDX RealT ime Webcam Video Compression, use gst_read1.0 as the reader: ln -sf
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$ICACLIENT _DIR/util/gst_read1.0 $ICACLIENT _DIR/util/gst_read.
Configuring HDX MediaStream Flash Redirection
HDX MediaStream Flash Redirection enables Adobe Flash content to play locally on user devices, providing users with high
definition audio and video playback, without increasing bandwidth requirements.
1. Ensure your user device meets the feature requirements. For more information see System requirements.
2. Add the following parameters to the [WFClient] section of wfclient.ini (for all connections made by a specific user) or the
[Client Engine\Application Launching] section of All_Regions.ini (for all users of your environment):
HDXF lashUseF lashRemot ing= Ask|Never|Always
Enables HDX Mediastream for Flash on the user device. By default, this is set to Never and users are presented with a
dialog box asking them if they want to optimize Flash content when connecting to web pages containing that
content.
HDXF lashEnableServerSideCont ent F et ching= Disabled|Enabled
Enables or disables server-side content fetching for Receiver. By default this is set to Disabled .
HDXF lashUseServerHt t pCookie= Disabled|Enabled
Enables or disables HT T P cookie redirection. By default, this is set to Disabled .
HDXF lashEnableClient SideCaching= Disabled|Enabled
Enables or disables client-side caching for web content fetched by Receiver. By default, this is set to Enabled .
HDXF lashClient CacheSize= [25-250]
Defines the size of the client-side cache, in megabytes (MB). T his can be any size between 25 and 250 MB. When the
size limit is reached, existing content in the cache is deleted to allow storage of new content. By default, this is set to
100 .
HDXF lashServerSideCont ent CacheT ype= P ersist ent |T emporary|NoCaching
Defines the type of caching used by Receiver for content fetched using server-side content fetching. By default, this
is set to P ersist ent .
Note: T his parameter is required only if HDXF lashEnableServerSideCont ent F et ching is set to Enabled .
3. Flash redirection is disabled by default. In /config/module.ini change FlashV2=Off to FlashV2=On to enable the feature.
Configure HDX RealTime webcam video compression
HDX RealT ime provides a webcam video compression option to improve bandwidth efficiency during video conferencing,
ensuring users experience optimal performance when using applications such as GoToMeeting with HD Faces, Skype for
business.
1. Ensure your user device meets the feature requirements.
2. Ensure the Multimedia virtual channel is enabled. T o do this, open the module.ini configuration file, located in the
$ICAROOT /config directory, and check that MultiMedia in the [ICA3.0] section is set to "On".
3. Enable audio input by clicking Use my microphone and webcam on the Mic & Webcam page of the Preferences dialog.
Disable HDX RealTime webcam video compression
By default, optimum webcam performance is provided by HDX RealT ime Webcam Video Compression. In some
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circumstances, however, you may require users to connect webcams using USB support. T o do this, you must do the
following:
Disable HDX RealT ime Webcam Video Compression
Enable USB support for webcams
1. Add the following parameter to the [WFClient] section of the appropriate .ini file:
HDXWebCamEnabled=Off
For more information, see Customize Receiver using configuration files.
2. Open the usb.conf file, typically located at $ICAROOT /usb.conf.
3. Remove or comment out the following line:
DENY: class=0e # UVC (default via HDX RealTime Webcam Video Compression)
4. Save and close the file.
Configuring H.264 support
Receiver supports the display of H.264 graphics, including HDX 3D Pro graphics, that are served by XenDesktop 7. T his
support uses the deep compression codec feature, which is enabled by default. T he feature provides better performance
of rich and professional graphics applications on WAN networks compared with the existing JPEG codec.
Follow the instructions in this topic to disable the feature (and process graphics using the JPEG codec instead). You can also
disable text tracking while still enabling deep compression codec support. T his helps to reduce CPU costs while processing
graphics that include complex images but relatively small amounts of text or non-critical text.
Important: T o configure this feature, do not use any lossless setting in the XenDesktop Visual quality policy. If you do,
H.264 encoding is disabled on the server and does not work in Receiver.
To disable deep compression codec support :
In wfclient.ini, set H264Enabled to False. T his also disables text tracking.
To disable t ext t racking only
With deep compression codec support enabled, in wfclient.ini set TextTrackingEnabled to False.
You can improve the way that JPEG-encoded screen tiles are processed using the direct-to-screen bitmap decoding, batch
tile decoding, and deferred XSync features.
1. Ensure that your JPEG library supports these features.
2. In the T hinwire3.0 section of wfclient.ini, set DirectDecode and BatchDecode to True.
Note: Enabling batch tile decoding also enables deferred XSync.
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Improving the user experience
Mar 0 6, 20 17
You can improve your users' experience with the following supported features:
Setting preferences
Configuring ClearT ype font smoothing
Configuring special folder redirection
Setting up server-client content redirection
Controlling keyboard behavior
Using xcapture
Reconnecting users automatically
Ensure session reliability
Relative Mouse
You can set preferences by clicking Preferences on the Citrix Receiver menu. You can control how desktops are displayed,
connect to different applications and desktops, and manage file and device access.
To manage an account
To access desktops and applications, you need an account with XenDeskop or XenApp. Your IT help desk might ask you to
add a new account to Citrix Receiver for this purpose, or they might ask you to use a different NetScaler Gateway or
Access Gateway server for an existing account. You can also remove accounts from Citrix Receiver.
1. On the Accounts page of the Preferences dialog box, do one of the following:
T o add an account, click Add. Your help desk may alternatively provide a provisioning file with account information
that you can use to create a new account.
T o change details of a store that the account uses, such as the default gateway, click Edit.
T o remove an account, click Remove.
2. Follow the on-screen prompts. You may be required to authenticate to the server.
To change how you see your desktops
T his feature is not available with Citrix XenApp for UNIX sessions.
You can display desktops across the entire screen on your user device (full screen mode), which is the default, or in a
separate window (windowed mode).
On the General page of the Preferences dialog box, select a mode using the "Display deskt op in " option.
Receiver for Linux now has the You can enable Deskt op Viewer toolbar functionality so it is possible dynamically modify
the window configuration of your remote session from the original settings specified by the configuration mentioned here.
Desktop Viewer
Different enterprises have different corporate needs. Your requirements for the way users access virtual desktops may vary
from user to user and may vary as your corporate needs evolve. T he user experience of connecting to virtual desktops and
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the extent of user involvement in configuring the connections depend on how you set up Receiver for Linux.
Use the Desktop Viewer when users need to interact with their virtual desktop. T he user's virtual desktop can be a
published virtual desktop, or a shared or dedicated desktop. In this access scenario, the Desktop Viewer toolbar
functionality allows the user to switch a session between windowed and full-screen session window, including multimonitor support for the intersected monitors. Users can switch between desktop sessions and work with more than one
desktop using multiple XenDesktop connections on the same user device. Buttons to minimize all desktop sessions, send
the Ctrl+Alt+Del sequence, disconnect, and log off the session are provided to conveniently manage a user’s session.
As an accessibility feature of the Desktop Viewer, pressing Ctrl+Alt+Break displays the Desktop Viewer toolbar buttons in a
pop-up window.
See the Linux OEM guide for advanced configuration entries to enable or disable Desktop Viewer or change the
accessibility key sequence.
To reconnect sessions automatically
Citrix Receiver can reconnect to desktops and applications that you become disconnected from (for example, if there is a
network infrastructure issue):
On the General page of the Preferences dialog box, select an option in Reconnect apps and desktops.
To control how local files are accessed
A virtual desktop or application may need to access files on your device. You can control the extent to which this happens.
1. On the File Access page of the Preferences dialog box, select a mapped drive and then one of the following options:
Read and write - Allow the desktop or application to read and write to local files.
Read only - Allow the desktop or application to read but not write to local files.
No access - Do not allow the desktop or application to access local files.
Ask me each time - Display a prompt each time the desktop or application needs to access local files.
2. If you selected one of the options that grants access to local files, you can additionally save time when browsing to
locations on your user device. Click Add, specify the location, and select a drive to map to it.
To set up a microphone or webcam
You can change the way a virtual desktop or application accesses your local microphone or webcam:
On the Mic & Webcam page of the Preferences dialog box, select one of the following options:
Use my microphone and webcam - Allow the microphone and webcam to be used by the desktop or application.
Don't use my microphone or webcam - Do not allow the microphone or webcam to be used by the desktop or
application.
To set up Flash Player
You can choose how Flash content is displayed. T his content is normally displayed in Flash Player and includes video,
animation, and applications:
On the Flash page of the Preferences dialog box, select one of the following options:
Optimize content - Improve playback quality at the risk of reducing security.
Don't optimize content - Provide basic playback quality without reducing security.
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Ask me each time - Prompt me each time Flash content is displayed.
ClearType font smoothing (also known as Sub-pixel font rendering) improves the quality of displayed fonts beyond that
available through traditional font smoothing or anti-aliasing. You can turn this feature on or off, or specify the type of
smoothing by editing the following setting in [WFClient] section of the appropriate configuration file:
FontSmoothingType = number
where number can take one of the following values:
Value
Behavior
0
T he local preference on the device is used. T his is defined by the FontSmoothingT ypePref setting.
1
No smoothing
2
Standard smoothing
3
ClearT ype (horizontal sub-pixel) smoothing
Both standard smoothing and ClearType smoothing can increase Receiver's bandwidth requirements.
Important: T he server can configure FontSmoothingT ype through the ICA file. T his takes precedence over the value set in
[WFClient]. If the server sets the value to 0, the local preference is determined by another setting in the [WFClient]:
FontSmoothingTypePref = number
where number can take one of the following values:
Value
Behavior
0
No smoothing
1
2
Standard smoothing
3
ClearT ype (horizontal sub-pixel) smoothing (default)
In this context, there are only two special folders for each user:
T he user’s Desktop folder
T he user’s Documents folder (My Documents on Windows XP)
Special folder redirection enables you to specify the locations of a user’s special folders so that these remain fixed across
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different server types and server farm configurations. T his is particularly important if, for example, a mobile user needs to log
on to servers in different server farms. For static, desk-based workstations, where the user can log on to servers that reside
in a single server farm, special folder redirection is rarely necessary.
To configure special folder redirection
T his is a two-part procedure. First, you enable special folder redirection by making an entry in module.ini; then you specify
the folder locations in the [WFClient] section, as described here:
1. Add the following text to module.ini (for example, $ICAROOT /config/module.ini):
[ClientDrive]
SFRAllowed = True
2. Add the following text to the [WFClient] section (for example, $HOME/.ICAClient/wfclient.ini):
DocumentsFolder = documents
DesktopFolder = desktop
where documents and desktop are the UNIX filenames, including the full path, of the directories to use as the users
Documents and Desktop folders respectively. For example:
DesktopFolder = $HOME/.ICAClient/desktop
You can specify any component in the path as an environment variable, for example, $HOME.
You must specify values for both parameters.
T he directories you specify must be available through client device mapping; that is, the directory must be in the
subtree of a mapped client device.
You must use the drive letters C or higher.
Server-client content redirection enables administrators to specify that URLs in a published application are opened using a
local application. For example, opening a link to a webpage while using Microsoft Outlook in a session opens the required
file using the browser on the user device. Server-client content redirection enables administrators to allocate Citrix
resources more efficiently, thereby providing users with better performance.
T he following types of URL can be redirected:
HT T P (Hypertext T ransfer Protocol)
HT T PS (Secure Hypertext T ransfer Protocol)
RT SP (Real Player)
RT SPU (Real Player)
PNM (Older Real Players)
If Citrix Receiver does not have an appropriate application or cannot directly access the content, the URL is opened using
the server application.
Server-client content redirection is configured on the server and enabled by default in Citrix Receiver provided that the path
includes RealPlayer and at least one of Firefox, Mozilla, or Netscape.
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For more information about RealPlayer for Linux, see http://www.real.com/resources/unix/.
To enable server-client content redirection if RealPlayer and a browser are not in
the path
1. Open the configuration file wfclient.ini.
2. In the [Browser] section, modify the following settings:
Path=path
Command=command
where path is the directory where the browser executable is located and command is the name of the executable used
to handle redirected browser URLs, appended with the URL sent by the server. For example:
$ICAROOT /nslaunch netscape,firefox,mozilla
T his setting specifies the following:
T he nslaunch utility is run to push the URL into an existing browser window
Each browser in the list is tried in turn until content can be displayed successfully
3. In the [Player] section, modify the following settings:
Path=path
Command=command
where path is the directory where the RealPlayer executable is located and command is the name of the executable
used to handle the redirected multimedia URLs, appended with the URL sent by the server.
4. Save and close the file.
For both Path settings, you need only specify the directory where the browser and RealPlayer executables reside. You do not need to
specify the full path to the executables. For example, in the [Browser] section, Path might be set to /usr/X11R6/bin rather than
/usr/X11R6/bin/netscape. In addition, you can specify multiple directory names as a colon-separated list. If these settings are not
specified, the user's current $PAT H is used.
To turn off server-client content redirection from Receiver
1. Open the configuration file module.ini.
2. Change the CREnabled setting to Off.
3. Save and close the file.
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To generate a remote Ctrl+Alt+Delete key combination:
1. Decide which key combination will create the Ctrl+Alt+Delete combination on the remote virtual desktop.
2. In the WFClient section of the appropriate configuration file, configure UseCtrlAltEnd accordingly:
T rue means that Ctrl+Alt+End passes the Ctrl+Alt+Delete combination to the remote desktop.
False (default) means that Ctrl+Alt+Enter passes the Ctrl+Alt+Delete combination to the remote desktop.
T he Citrix Receiver package includes a helper application, xcapture, to assist with the exchange of graphical data between
the server clipboard and non-ICCCM-compliant X Windows applications on the X desktop. Users can use xcapture to:
Capture dialog boxes or screen areas and copy them between the user device desktop (including non-ICCCM-compliant
applications) and an application running in a connection window
Copy graphics between a connection window and X graphics manipulation utilities xmag or xv
To start xcapture from the command line
At the command prompt, type /opt/Citrix/ICAClient/util/xcapture and press ENT ER (where /opt/Citrix/ICAClient is the
directory in which you installed Receiver).
To copy from the user device desktop
1. From the xcapture dialog box, click From Screen. T he cursor changes to a crosshair.
2. Choose from the following tasks:
Select a window. Move the cursor over the window you want to copy and click the middle mouse button.
Select a region. Hold down the left mouse button and drag the cursor to select the area you want to copy.
Cancel the selection. Click the right mouse button. While dragging, you can cancel the selection by clicking the right
button before releasing the middle or left mouse button.
3. From the xcapture dialog box, click T o ICA. T he xcapture button changes color to show that it is processing the
information.
4. When the transfer is complete, use the appropriate paste command in an application launched from the connection
window.
To copy from xv to an application in a connection window
1. From xv, copy the information.
2. From the xcapture dialog box, click From XV and then click T o ICA. T he xcapture button changes color to show that it is
processing the information
3. When the transfer is complete, use the appropriate paste command in an application launched from the connection
window.
To copy from an application in the connection window to xv
1. From the application in a connection window, copy the information.
2. From the xcapture dialog box, click From ICA and then click T o XV. T he xcapture button changes color to show that it is
processing the information
3. When the transfer is complete, paste the information into xv.
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T his topic describes the HDX Broadcast auto-client reconnection feature. Citrix recommends you use this in conjunction
with the HDX Broadcast session reliability feature.
Users can be disconnected from their sessions because of unreliable networks, highly variable network latency, or range
limitations of wireless devices. With the HDX Broadcast auto-client reconnection feature, Citrix Receiver can detect
unintended disconnections of sessions and reconnect users to the affected sessions automatically.
When this feature is enabled on the server, users do not have to reconnect manually to continue working. Citrix Receiver
attempts to reconnect to the session a set number of times until there is a successful reconnection or the user cancels the
reconnection attempts. If user authentication is required, a dialog box requesting credentials appears to a user during
automatic reconnection. Automatic reconnection does not occur if users exit applications without logging off. Users can
reconnect only to disconnected sessions.
By default, Citrix Receiver waits 30 seconds before attempting to reconnect to a disconnected session and attempts to
reconnect to that session three times.
When connecting through an AccessGateway, ACR is not available. To protect against network dropouts, ensure that
Session Reliability is enabled both on the Server and Client, as well as configured on the AccessGateway.
For instructions on configuring HDX Broadcast auto-client reconnection, see your XenApp and XenDesktop
documentation.
T his topic describes the HDX Broadcast session reliability feature, which is enabled by default.
With HDX Broadcast session reliability, users continue to see a published application's window if the connection to the
application experiences an interruption. For example, wireless users entering a tunnel may lose their connection when they
enter the tunnel and regain it when they emerge on the other side. During the downtime, all of the user's data, key presses,
and other interactions are stored, and the application appears frozen. When the connection is re-established, these
interactions are replayed into the application.
When auto-client reconnection and session reliability are configured, session reliability will take precedence if there is a
connection problem. Session reliability attempts to re-establish a connection to the existing session. It may take up to 25
seconds to detect a connection problem, and then takes a configurable period of time (the default is 180 seconds) to
attempt the re-connection. If session reliability fails to reconnect, then auto-client reconnect attempts to reconnect.
If HDX Broadcast session reliability is enabled, the default port used for session communication switches from 1494 to
2598.
Citrix Receiver users cannot override the server settings. For more information on these, see your XenApp and XenDesktop
documentation.
Important
HDX Broadcast session reliability requires that another feature, Common Gateway Protocol, is enabled (using policy settings) on the
server. Disabling Common Gateway Protocol also disables HDX Broadcast session reliability.
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Relative Mouse support provides an option to interpret the mouse position in a relative rather than absolute manner. T his
capability is required for applications that demand relative mouse input rather than absolute.
T his feature is available only in sessions running on XenApp or XenDesktop 7.8 (or later). It is disabled by default.
To enable t he f eat ure:
In the file $HOME/.ICAClient/wfclient.ini, in the section [WFClient], add the entry RelativeMouse=1.
T his enables the feature but keeps it inactive until you activate it.
Refer to the section Alternative Relative Mouse values for additional information about enabling relative mouse features.
To act ivat e t he f eat ure:
Type Ctrl/F12.
Once the feature is enabled, type Ctrl/F12 again to synchronize the server pointer position with the client (the server and
client pointer positions are not synchronised when using Relative Mouse).
To deact ivat e t he f eat ure:
Type Ctrl-Shift/F12.
T he feature is also switched off when a session window loses focus.
Alternative Relative Mouse values
Alternatively, consider using the following values for RelativeMouse:
RelativeMouse=2 Enables the feature and activates it whenever a session window gains focus.
RelativeMouse=3 Enables, activates, and keeps the feature activated at all times.
To change the keyboard commands, add settings like:
RelativemouseOnChar=F11
RelativeMouseOnShift=Shift
RelativemouseOffChar=F11
RelativeMouseOffShift=Shift
T he supported values for Relat ivemouseOnChar and Relat ivemouseOf f Char are listed under [Hotkey Keys] in the
config/module.ini file in the Citrix Receiver installation tree. T he values for Relat iveMouseOnShif t and
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Relat iveMouseOf f Shif t set the modifier keys to be used and are listed under the [Hotkey Shift States] heading.
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Secure
Mar 0 6, 20 17
In this article:
Connecting through a proxy server
Connecting with the Secure Gateway or Citrix Secure Sockets Layer Relay
Connecting through NetScaler Gateway
To secure the communication between your server farm and Citrix Receiver, you can integrate your Citrix Receiver
connections to the server farm with a range of security technologies, including:
A SOCKS proxy server or secure proxy server (also known as security proxy server, HT T PS proxy server, or T LS tunneling
proxy server). You can use proxy servers to limit access to and from your network and to handle connections between
Receiver and servers. Receiver supports SOCKS and secure proxy protocols.
Secure Gateway or SSL Relay solutions with T ransport Layer Security (T LS) protocols. T LS versions 1.0 through 1.2 are
supported.
A firewall. Network firewalls can allow or block packets based on the destination address and port. If you are using
Receiver through a network firewall that maps the server's internal network IP address to an external Internet address
(that is, network address translation, or NAT ), configure the external address.
Proxy servers are used to limit access to and from your network, and to handle connections between Citrix Receiver and
your Citrix XenApp or Citrix XenDesktop deployment. Citrix Receiver supports the SOCKS protocol, along with the Secure
Gateway and Citrix SSL Relay, the secure proxy protocol, and Windows NT Challenge/Response (NT LM) authentication.
T he list of supported proxy types is restricted by the contents of Trusted_Regions.ini and Untrusted_Regions.ini to the
Auto, None, and Wpad types. If you need to use the SOCKS, Secure or Script types, edit those files to add the additional
types to the permitted list.
To ensure a secure connection, enable T LS.
Connecting through a secure proxy server
Configuring connections to use the secure proxy protocol also enables support for Windows NT Challenge/Response
(NT LM) authentication. If this protocol is available, it is detected and used at run time without any additional configuration.
Important
NT LM support requires that the OpenSSL library, libcrypto.so, is installed on the user device. T his library is often included in Linux
distributions, but can be downloaded from http://www.openssl.org/ if required in new window.
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You can integrate Receiver with the Secure Gateway or Secure Sockets Layer (SSL) Relay service. Receiver supports the T LS
protocol.T LS (Transport Layer Security) is the latest, standardized version of the SSL protocol. T he Internet Engineering
Taskforce (IET F) renamed it T LS when it took over responsibility for the development of SSL as an open standard. T LS
secures data communications by providing server authentication, encryption of the data stream, and message integrity
checks. Some organizations, including U.S. government organizations, require the use of T LS to secure data
communications. T hese organizations may also require the use of validated cryptography, such as FIPS 140 (Federal
Information Processing Standard). FIPS 140 is a standard for cryptography.
Connecting with the Secure Gateway
You can use the Secure Gateway in either Normal mode or Relay mode to provide a secure channel for communication
between Citrix Receiver and the server. No configuration of Citrix Receiver is required if you are using the Secure Gateway in
Normal mode and users are connecting through the Web Interface.
Citrix Receiver uses settings that are configured remotely on the server running the Web Interface to connect to servers
running the Secure Gateway. For information about configuring proxy server settings for Citrix Receiver, see the Web
Interface documentation.
If the Secure Gateway Proxy is installed on a server in the secure network, you can use the Secure Gateway Proxy in Relay
mode. For more information, see the XenApp (Secure Gateway) documentation.
If you are using Relay mode, the Secure Gateway server functions as a proxy and you must configure Citrix Receiver to use:
T he fully qualified domain name (FQDN) of the Secure Gateway server.
T he port number of the Secure Gateway server. Note that Relay mode is not supported by Secure Gateway Version 2.0.
T he FQDN must list, in sequence, the following three components:
Host name
Intermediate domain
T op-level domain
For example: my_computer.my_company.com is an FQDN, because it lists, in sequence, a host name (my_computer), an
intermediate domain (my_company), and a top-level domain (com). T he combination of intermediate and top-level domain
(my_company.com) is generally referred to as the domain name.
Connecting with Citrix SSL Relay
By default, Citrix SSL Relay uses TCP port 443 on the XenApp server for T LS-secured communication. When the SSL Relay
receives a T LS connection, it decrypts the data before redirecting it to the server.
If you configure SSL Relay to listen on a port other than 443, you must specify the non-standard listening port number to
Citrix Receiver.
You can use Citrix SSL Relay to secure communications:
Between a T LS-enabled user device and a server
With Web Interface, between the XenApp server and the web server
For information about configuring and using SSL Relay to secure your installation, see the XenApp documentation. For
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information about configuring the Web Interface to use T LS encryption, see the Web Interface documentation.
Configuring and enabling TLS
You can control the versions of the T LS protocol that can be negotiated by adding the following configuration options in
the [WFClient] section:
MinimumT LS=1.0
MaximumT LS=1.2
T hese are the default values, which are implemented in code. Adjust them as you require.
Not e : T hese values will be read whenever programs start. If you change them after starting selfservice or storebrowse you
should type: killall Aut hManagerDaemon ServiceRecord self service st orebrowse.
Not e : T his version of Citrix Receiver for Linux disables the use of the SSLv3 protocol.
For T CP connections Citrix Receiver for Linux supports T LS 1.0, 1.1, and 1.2 with the following cipher suite T LS connections
between Receiver and XenApp/XenDesktop:
T LS_RSA_WIT H_AES_256_CBC_SHA
T LS_RSA_WIT H_AES_128_CBC_SHA
T LS_RSA_WIT H_RC4_128_SHA
T LS_RSA_WIT H_RC4_128_MD5
T LS_RSA_WIT H_3DES_EDE_CBC_SHA
For UDP connections, Citrix Receiver for Linux supports DT LS 1.0 with the following cipher suite T LS connections between
Receiver and XenApp/XenDesktop:
T LS_RSA_WIT H_AES_256_CBC_SHA
T LS_RSA_WIT H_AES_128_CBC_SHA
T LS_RSA_WIT H_3DES_EDE_CBC_SHA
Installing root certificates on user devices
T o use T LS, you need a root certificate on the user device that can verify the signature of the Certificate Authority on the
server certificate. By default, Citrix Receiver supports the following certificates.
Cert if icat e
Issuing Aut horit y
Class4PCA_G2_v2.pem
VeriSign T rust Network
Class3PCA_G2_v2.pem
VeriSign T rust Network
BT CT Root.pem
Baltimore Cyber T rust Root
GT ECT GlobalRoot.pem
GT E Cyber T rust Global Root
Pcs3ss_v4.pem
Class 3 Public Primary Certification Authority
GeoT rust_Global_CA.pem
GeoT rust
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DigiCertGlobalRootCA.pem
DigiCert Global Root CA
You are not required to obtain and install root certificates on the user device to use the certificates from these Certificate
Authorities. However, if you choose to use a different Certificate Authority, you must obtain and install a root certificate
from the Certificate Authority on each user device.
Important: Citrix Receiver does not support keys of more than 4096 bits. You must ensure that the Certificate Authority
root and intermediate certificates, and your server certificates, are less than or equal to 4096 bits long.
Note: Receiver for Linux 13.0 uses c_rehash from the local device. Version 13.1 and subsequent versions use the
ctx_rehash tool as described in the following steps.
Use a root cert ificat e
If you need to authenticate a server certificate that was issued by a certificate authority and is not yet trusted by the user
device, follow these instructions before adding a StoreFront store.
1. Obtain the root certificate in PEM format.
T ip: If you cannot find a certificate in this format, use the openssl utility to convert a certificate in CRT format to a .pem
file.
2. As the user who installed the package (usually root):
1. Copy the file to $ICAROOT /keystore/cacerts.
2. Run the following command:
$ICAROOT/util/ctx_rehash
Use an int ermediat e cert ificat e
If your StoreFront server is not able to provide the intermediate certificates that match the certificate it is using, or you
need to install intermediate certificates to support smart card users, follow these steps before adding a StoreFront store.
1. Obtain the intermediate certificate(s) separately in PEM format.
T ip: If you cannot find a certificate in this format, use the openssl utility to convert a certificate in CRT format to a .pem
file.
2. As the user who installed the package (usually root):
1. Copy the file(s) to $ICAROOT /keystore/intcerts.
2. Run the following command as the user who installed the package:
$ICAROOT/util/ctx_rehash
Enabling smart card support
Citrix Receiver for Linux provides support for a number of smart card readers. If smart card support is enabled for both the
server and Receiver, you can use smart cards for the following purposes:
Smart card logon authentication. Use smart cards to authenticate users to Citrix XenApp servers.
Smart card application support. Enable smart card-aware published applications to access local smart card devices.
Smart card data is security sensitive and should be transmitted over a secure authenticated channel, such as T LS.
Smart card support has the following prerequisites:
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Your smart card readers and published applications must be PC/SC industry standard compliant.
You must install the appropriate driver for your smart card.
You must install the PC/SC Lite package.
You must install and run the pcscd Daemon, which provides middleware to access the smart card using PC/SC.
On a 64-bit system, both 64-bit and 32-bit versions of the "libpscslite1" package must be present.
Important: If you are using the SunRay terminal with SunRay server software Version 2.0 or later, you must install the PC/SC
SRCOM bypass package, available for download from http://www.sun.com/.
For more information about configuring smart card support on your servers, see the XenDesktop and XenApp
documentation.
Citrix NetScaler Gateway (formerly Access Gateway) secures connections to StoreFront stores, and lets administrators
control, in a detailed way, user access to desktops and applications.
To connect t o deskt ops and applicat ions t hrough Net Scaler Gat eway
1. Specify the NetScaler Gateway URL that your administrator provides. You can do this in one of these ways:
T he first time you use the self-service user interface, you are prompted to enter the URL in the Add Account dialog
box
When you later use the self-service user interface, enter the URL by clicking Preferences > Accounts > Add
If you are establishing a connection with the storebrowse command, enter the URL at the command line
T he URL specifies the gateway and, optionally, a specific store:
T o connect to the first store that Receiver finds, use a URL of the form https://gateway.company.com.
T o connect to a specific store, use a URL of the form https://gateway.company.com?<storename>. Note that
this dynamic URL is in a non-standard form; do not include = (the equals sign character) in the URL. If you are
establishing a connection to a specific store with storebrowse, you will likely need quotation marks around the URL in
the storebrowse command.
2. When prompted, connect to the store (through the gateway) using your user name, password, and security token. For
more information on this step, see the NetScaler Gateway documentation.
When authentication is complete, your desktops and applications are displayed.
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Troubleshoot
Mar 0 6, 20 17
T his article contains information to help administrators troubleshoot issues with Citrix Receiver for Linux.
Connection issues
Display issues
Browser Issues
Other issues
Connection configuration errors
wfclient.ini configuration errors
PAC file errors
Other errors
Sending diagnostic information to Citrix T echnical Support
You may encounter the following connection issues.
Windows Media Player fails to play files in certain formats
Citrix Receiver may not have GStreamer plugins to handle a requested format. T his normally causes the server to request a
different format. Sometimes the initial check for a suitable plugin incorrectly indicates one is present. T his is normally
detected and causes an error dialog to appear on the server indicating that Windows Media Player encountered a problem
while playing the file. Retrying the file within the session typically works because the format is rejected by Citrix Receiver,
and as a result, the server will either request another format or render the media itself.
In a few situations the fact that there is no suitable plugin is not detected and the file is not played correctly, despite the
progress indicator moving as expected in Windows Media Player.
To avoid this error dialog or failure to play in future sessions:
1. T emporarily add the configuration option "SpeedScreenMMAVerbose=On" to the [WFClient] section of
$Home/.ICAClient/wfclient.ini, for example.
2. Restart wfica from a self-service that has been started from a terminal.
3. Play a video that generates this error.
4. Note (in the tracing output) the mime-type associated with the missing plugin trace, or the mime-type that should be
supported but does not play (for example, "video/x-h264..").
5. Edit $ICAROOT /config/MediaStreamingConfig.tbl; on the line with the noted mime-type insert a '?' between the ':' and
the mime type. T his disables the format.
6. Repeat steps 2-5 (above) for other media formats that produce this error condition.
7. Distribute this modified MediaStreamingConfig.tbl to other machines with the same set of GStreamer plugins.
Not e : Alternately, after identifying the mime-type it may be possible to install a GStreamer plugin to decode it.
I cannot connect properly to a published resource or desktop session
If, when establishing a connection to a Windows server, a dialog box appears with the message “Connecting to server…” but
no subsequent connection window appears, you may need to configure the server with a Client Access License (CAL). For
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more information about licensing, see Licensing Your Product.
I sometimes fail to connect when I try reconnecting to sessions
Sometimes reconnecting to a session with a higher color depth than that requested by Receiver causes the connection to
fail. T his is due to a lack of available memory on the server. If the reconnection fails, Receiver will try to use the original color
depth. Otherwise, the server will try to start a new session with the requested color depth, leaving the original session in a
disconnected state. However, the second connection may also fail if there is still a lack of available memory on the server.
I cannot connect to a server using its full Internet name
Citrix recommends that you configure DNS (Domain Name Server) on your network to enable you to resolve the names of
servers to which you want to connect. If you do not have DNS configured, it may not be possible to resolve the server
name to an IP address. Alternatively, you can specify the server by its IP address, rather than by its name, but note that T LS
connections require a fully qualified domain name, not an IP address.
I get a “Proxy detection failure” error message when connecting
If your connection is configured to use automatic proxy detection and you see a “Proxy detection failure: Javascript error”
error message when trying to connect, copy the wpad.dat file into $ICAROOT /util. Run the following command, where
hostname is the hostname of the server to which you are trying to connect:
cat wpad.dat | ./pacexec pac.js FindProxyForURL http://hostname hostname 2>&1 | grep “undeclared variable”
If you get no output, there is a serious issue with the wpad.dat file on the server that you need to investigate. However, if
you see output such as “assignment to undeclared variable ...” you can fix the problem. Open pac.js and for each variable
listed in the output, add a line at the top of the file in the following format, where “...” is the variable name.
var ...;
Sessions are very slow to start
If a session does not start until you move the mouse, there may be a problem with random number generation in the Linux
kernel. To work around this, run an entropy-generating daemon such as rngd (which is hardware-based) or haveged (from
Magic Software).
I want to configure a serial port setting
To configure a single serial port, add the following entries in the $ICAROOT /config/module.ini configuration file:
LastComPortNum=1
ComPort1=<device>
To configure two or more serial ports, add the following entries in the $ICAROOT /config/module.ini configuration file:
LastComPortNum=2
ComPort1=<device1>
ComPort2=<device2>
Connection errors
An error dialog may appear indicating an "Error in connection: A protocol error occurred while communicating with the
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Authentication Service". A number of problems may cause this error condition, including:
When the local computer and the remote computer cannot negotiate a common T LS protocol.
When the remote computer requests a client certificate inappropriately. IIS should only "accept" or "require" certificates
for "Citrix/Authentication/Certificate".
Other problems.
Why am I seeing Screen Tearing?
Screen tearing occurs when parts of two (or more) different frames appear on the screen at the same time, in horizontal
blocks. T his is most visible with large areas of fast changing content on screen. Although the data is captured at the VDA in
a way that avoids tearing, and the data is passed to the client in a way that doesn't introduce tearing, X11 (the Linux/Unix
graphics subsystem) does not provide a consistent way to draw to the screen in a way that prevents tearing.
To prevent screen tearing, Citrix recommends the standard approach which synchronizes application drawing with the
drawing of the screen; that is, wait for vsvnc, to initiate the drawing of the next frame. T here are a number of options
when using Linux, depending on the graphics hardware you have on the client and what window manager you are using.
T hese options are divided into two groups of solutions:
X11 GPU settings
Use a Composition Manager
X11 GP U Conf igurat ion
For Intel HD grahics, create a file in the xorg.conf.d called 20-int el.conf with the following contents:
Section "Device"
Identifier "Intel Graphics"
Driver
"intel"
Option
Option
"AccelMethod" "sna"
"T earFree" "true"
EndSection
For Nvidia graphics, locate the file in the xorg.conf.d folder that contains the "MetaModes" Option for your configuration.
For each comma separated MetaMode used add the following:
{ForceFullCompositionPipeline = On}
For eample:
Option "MetaModes" "DFP-0: 1920x1200 +0+0 {ForceFullCompositionPipeline = On}"
Not e : Different Linux distributions use different paths to xorg.conf.d, for example, /etc/X11/xorg.conf.d, or,
/user/share/X11/xorg.conf.d.
Composit ion Managers
Use the following:
Compiz (built into Ubuntu Unity). You will need to install the "ComprizConfig Settings Manager."
Run "ComprizConfig Settings Manager"
Under "General->Composition", uncheck "Undirect Fullscreen Windows"
Not e : "ComprizConfig Settings Manager" should be used with caution, as incorrectly changing values can prevent the
system from launching.
Compton (an add-on utility). Refer to the man page/documentation for Compton for full details. For example, run the
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following command:
compton --vsync opengl --vsync -aggressive
Incorrect keystrokes appear when I use the keyboard
If you are using a non-English language keyboard, the screen display may not match the keyboard input. In this case, you
should specify the keyboard type and layout that you are using. For more information about specifying keyboards, see
Control keyboard behavior.
I see excessive redrawing when moving seamless windows
Some window managers continuously report the new window position when moving a window, which can result in
excessive redrawing. To fix this problem, switch the window manager to a mode that draws only window outlines when
moving a window.
Icon compatibility
Receiver creates window icons that work with most window managers, but are not fully compatible with the X Inter-Client
Communication Convention.
To provide f ull icon compat ibilit y
1. Open the wfclient.ini configuration file.
2. Edit the following line in the [WFClient] section: UseIconWindow=T rue
3. Save and close the file.
I have cursor visibility problems
T he cursor can be difficult to see if it is the same or similar in color to the background. You can fix this by forcing areas of
the cursor to be black or white.
To change the color of the cursor
1. Open the wfclient.ini configuration file.
2. Add one of the following lines to the [WFClient] section:
CursorStipple=ffff,ffff (to make the cursor black)
CursorStipple=0,0 (to make the cursor white)
3. Save and close the file.
I experience color flashing on the screen
When you move the mouse into or out of a connection window, the colors in the non-focused window may start to flash.
T his is a known limitation when using the X Windows System with PseudoColor displays. If possible, use a higher color depth
for the affected connection.
I experience rapid color changes with TrueColor displays
Users have the option of using 256 colors when connecting to a server. T his option assumes that the video hardware has
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palette support to enable applications to rapidly change the palate colors to produce animated displays.
TrueColor displays have no facility to emulate the ability to produce animations by rapidly changing the palette. Software
emulation of this facility is expensive both in terms of time and network traffic. To reduce this cost, Receiver buffers rapid
palette changes, and updates the real palette only every few seconds.
Japanese characters display incorrectly on my screen
Receiver uses EUC-JP or UT F-8 character encoding for Japanese characters, while the server uses SJIS character encoding.
Receiver does not translate between these character sets. T his can cause problems displaying files that are saved on the
server and viewed locally, or saved locally and viewed on the server. T his issue also affects Japanese characters in parameters
used in extended parameter passing.
I want to make a session that spans multiple monitors
Full-screen sessions span all monitors by default, but a command-line multi-monitor display control option, -span, is also
available. It allows full-screen sessions to span multiple monitors.
Desktop viewer toolbar functionality allows you to switch a session between windowed and full screen session window,
including multi-monitor support for the intersected monitors. For details, see Improving user experience.
Important: -span has no effect on Seamless or normal windowed sessions (including those in maximized windows).
T he - span option has the following format:
-span [h][o][a|mon1[,mon2[,mon3,mon4]]]
If h is specified, a list of monitors is printed on stdout. And if that is the whole option value, wfica then exits.
If o is specified, the session window will have the override-redirect redirect attribute.
Caution: T he use of this option value is not recommended. It is intended as a last resort, for use with uncooperative
window managers. T he session window will not be visible to the window manager, will not have an icon and can not be
restacked. It can be removed only by ending the session.
If a is specified, Receiver tries to create a session that covers all monitors.
Receiver assumes that the rest of the -span option value is a list of monitor numbers. A single value selects a specific
monitor, two values select monitors at the top-left and bottom-right corners of the required area, four specify monitors at
the top, bottom, left and right edges of the area.
Assuming o was not specified, wfica will use the _NET _WM_FULLSCREEN_MONITORS message to request an appropriate
window layout from the window manager, if it is supported. Otherwise, it will use size and position hints to request the
desired layout.
T he following command can be used to test for window manager support:
xprop -root | grep _NET _WM_FULLSCREEN_MONITORS
If there is no output, there is no support. If there is no support, you may need an override-redirect window. You can set up
an override-redirect window using -span o.
To make a session that spans multiple monitors from the command line:
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1. At a command prompt, type:
/opt/Citrix/ICAClient/wfica -span h
A list of the numbers of the monitors currently connected to the user device is printed to stdout and wfica exits.
2. Make a note of these monitor numbers.
3. At a command prompt, type:
/opt/Citrix/ICAClient/wfica -span [w[,x[,y,z]]]
where w, x, y and z are monitor numbers obtained in step 1 above and the single value w, specifies a specific monitor, two
values w and x specify monitors at the top-left and bottom-right corners of the required area, and four values w, x, y and
z specify monitors at the top, bottom, left and right edges of the area.
Important: You must define the WFICA_OPT S variable before starting selfservice or connecting to the Web interface
through a browser. T o do this, edit your profile file, normally found at $HOME/.bash_profile or $HOME/.profile, adding a
line to define the WFICA_OPT S variable. For example:
export WFICA_OPTS=" -span a"
Note that this change affects both XenApp and XenDesktop sessions.
If you have already started selfservice or storebrowse you must remove processes they started in order for the new
environment variable to take effect. Remove them with:
killall AuthManagerDaemon ServiceRecord storebrowse
I cannot escape from a full-screen session to use local applications or another
session
T his occurs because the client-side system UI is hidden and the Keyboard Transparency feature disables the usual keyboard
command, for example Alt+Tab, sending the command to the server instead.
To work around this, use CT RL+F2 to turn off the Keyboard Transparency feature temporarily until the focus next returns
to the session window. An alternative workaround is to set TransparentKeyPassthrough to No in
$ICAROOT /config/module.ini. T his disables the Keyboard Transparency feature, however you may have to override the ICA
file by adding this setting in the All_regions.ini file.
When I click on a link in a Windows session, the content appears in a local browser
Server-client content redirection is enabled in wfclient.ini. T his causes a local application to run. To disable server-client
content redirection, see Set up server-client content redirection.
When accessing published resources, my browser prompts me to save a file
Browsers other than Firefox and Chrome may require configuration before you can connect to a published resource. If you
are connecting through the Web Interface, you may be able to access the Web Interface home page with the list of
resources. However, when trying to access a resource by clicking an icon on the page, your browser prompts you to save
the ICA file.
To configure a different browser for use with Web Interface
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Details vary among browsers, but you can set up the MIME data types in the browser so that the $ICAROOT /wfica is
executed as a helper application when the browser encounters data with the application/x-ica MIME type or an .ica file.
The installer does not support a specific browser
If you have problems using a specific web browser, set the environment variable BROWSER to specify the local path and
name of the required browser before running setupwfc.
When I launch desktops or applications in Firefox, nothing happens
Try enabling the ICA plug-in.
The ICA plug-in is enabled in Firefox, however desktop and application sessions are
not starting
Try disabling the ICA plug-in.
You may also encounter the following additional issues.
I want to know if the server has instructed Receiver to close a session
You can use the wfica program to log when it has received a command to terminate the session from the server.
To record this information through the syslog system, add SyslogThreshold with the value 6 to the [WFClient] section of
the configuration file. T his enables the logging of messages that have a priority of LOG_INFO or higher. T he default value
for SyslogThreshold is 4 (=LOG_WARNING).
Similarly, to have wfica send the information to standard error, add PrintLogThreshold with the value 6 to the [WFClient]
section. T he default valuefor PrintLogThreshold is 0 (=LOG_EMERG).
Refer to your operating system's documentation for instructions on configuring your syslog system.
My configuration file settings no longer work
For each entry in wfclient.ini, there must be a corresponding entry in All_Regions.ini for the setting to take effect. In
addition, for each entry in the [T hinwire3.0], [ClientDrive], and [TCP/IP] sections of wfclient.ini, there must be a
corresponding entry in canonicalization.ini for the setting to take effect. See the All_Regions.ini and canonicalization.ini files
in the $ICAROOT /config directory for more information.
I have problems running published applications that access a serial port
If a published application needs to access a serial port, the application may fail (with or without an error message,
depending on the application itself) if the port has been locked by another application. Under such circumstances, check
that there are no applications that have either temporarily locked the serial port or have locked the serial port and exited
without releasing it.
To overcome this problem, stop the application that is blocking the serial port; in the case of UUCP-style locks, there may be
a lock file left behind after the application exits. T he location of these lock files depends on the operating system used.
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I cannot start Receiver
If Receiver does not start and the error message “Application default file could not be found or is out of date” appears, this
may be because the environment variable ICAROOT is not defined correctly. T his is a requirement if you installed Receiver to
a non-default location. To overcome this problem, Citrix recommends that you do one of the following:
Define ICAROOT as the installation directory.
To check the ICAROOT environment variable is defined correctly, try starting Receiver from a terminal session. If the error
message still appears, it is likely that the ICAROOT environment variable is not correctly defined.
Reinstall Receiver to the default location. For more information about installing Receiver, see Downloading and installing
Receiver for Linux.
If Receiver was previously installed in the default location, remove the /opt/Citrix/ICAClient or
$HOME/ICAClient/platform directory before reinstalling.
My keyboard shortcuts do not function correctly
If your window manager uses the same key combinations to provide native functionality, your key combinations might not
function correctly. For example, the KDE window manager uses the combinations from CT RL+SHIFT +F1 to
CT RL+SHIFT +F4 to switch between desktops 13 to 16. If you experience this problem, try the following solutions:
T ranslated mode on the keyboard maps a set of local key combinations to server-side key combinations. For example, by
default in T ranslated mode, CT RL+SHIFT +F1 maps to the server-side key combination ALT +F1. T o reconfigure this
mapping to an alternative local key combination, update the following entry in the [WFClient] section of
$HOME/.ICAClient/wfclient.ini. T his maps the local key combination Alt+Ctrl+F1 to Alt+F1:
Change Hotkey1Shift=Ctrl+Shift to Hotkey1Shift=Alt+Ctrl.
Direct mode on the keyboard sends all key combinations directly to the server. T hey are not processed locally. T o
configure Direct mode, in the [WFClient] section of $HOME/.ICAClient/wfclient.ini, set TransparentKeyPassthrough
to Remote.
Reconfigure the window manager so that it suppresses default keyboard combinations.
I want to enable a remote Croatian keyboard
T his procedure ensures that ASCII characters are correctly sent to remote virtual desktops with Croatian keyboard layouts.
1. In the WFClient section of the appropriate configuration file, set UseEUKSforASCII to T rue.
2. Set UseEUKS to 2.
I want to find the Citrix SSLSDK or OpenSSL version number
T o confirm the version number of the Citrix SSLSDK or OpenSSL that you are running, you can use the following command:
strings libctxssl.so | grep " Citrix SSLSDK"
You can also run this command on AuthManagerDaemon or PrimaryAuthManager
I want to use a Japanese keyboard on the client
T o configure use of a Japanese keyboard, update the following entry in the wfclient.ini configuration file:
KeyboardLayout=Japanese (JIS)
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I want to use a ABNT2 keyboard on the client
T o configure use of an ABNT 2 keyboard, update the following entry in the wfclient.ini configuration file:
KeyboardLayout=Brazilian (ABNT2)
Some keys on my local keyboard do not behave as expected
Choose the best-matching server layout from the list in $ICAROOT /config/module.ini.
T hese errors might occur if you configured a connection entry incorrectly.
E_MISSING_INI_SECT ION - Verif y t he configurat ion file: "...". T he sect ion "..." is missing in t he configurat ion
file.
T he configuration file was incorrectly edited or is corrupt.
E_MISSING_INI_ENT RY - Verif y t he configurat ion file: "...". T he sect ion "..." must cont ain an ent ry "...".
T he configuration file was incorrectly edited or is corrupt.
E_INI_VENDOR_RANGE - Verif y t he configurat ion file: "...". T he X server vendor range "..." in t he configurat ion
file is invalid.
T he X Server vendor information in the configuration file is corrupt. Contact Citrix.
T hese errors might occur if you edited wfclient.ini incorrectly.
E_CANNOT _WRIT E_F ILE - Cannot writ e file: "..."
T here was a problem saving the connection database; for example, no disk space.
E_CANNOT _CREAT E_F ILE - Cannot creat e file: "..."
T here was a problem creating a new connection database.
E_P NAGENT _F ILE_UNREADABLE - Cannot read XenApp file "...": No such file or direct ory.
— Or —
Cannot read XenApp file "...": P ermission denied.
You are trying to access a resource through a desktop item or menu, but the XenApp file for the resource is not available.
Refresh the list of published resources by selecting Application Refresh on the View menu, and try to access the resource
again. If the error persists, check the properties of the desktop icon or menu item, and the XenApp file to which the icon or
item refers.
T hese errors may occur if your deployment uses proxy auto-configuration (PAC) files to specify proxy configurations.
P roxy det ect ion f ailure: Improper aut o-configurat ion URL.
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An address in the browser was specified with an invalid URL type. Valid types are http:// and https://, and other types are
not supported. Change the address to a valid URL type and try again.
P roxy det ect ion f ailure: .PAC script HT T P download f ailed: Connect f ailed.
Check if an incorrect name or address was entered. If so, fix the address and retry. If not, the server could be down. Retry
later.
P roxy det ect ion f ailure: .PAC script HT T P download f ailed: Pat h not f ound.
T he requested PAC file is not on the server. Either change this on the server, or reconfigure the browser.
P roxy det ect ion f ailure: .PAC script HT T P download f ailed.
T he connection failed while downloading the PAC file. Reconnect and try again.
P roxy det ect ion f ailure: Empt y aut o-configurat ion script .
T he PAC file is empty. Either change this on the server, or reconfigure the browser.
P roxy det ect ion f ailure: No JavaScript support .
T he PAC executable or the pac.js text file is missing. Reinstall Receiver.
P roxy det ect ion f ailure: JavaScript error.
T he PAC file contains invalid JavaScript. Fix the PAC file on the server. Also see Connection issues.
P roxy det ect ion f ailure: Improper result f rom proxy aut o-configurat ion script .
A badly formed response was received from the server. Either fix this on the server, or reconfigure the browser.
T his topic contains a list of other common error messages you may see when using Receiver.
An error occurred. T he error code is 11 (E_MISSING_INI_SECT ION). P lease ref er t o t he document at ion.
Exit ing.
When running Receiver from the command line, this usually means the description given on the command line was not
found in the appsrv.ini file.
E_BAD_OP T ION - T he opt ion "..." is invalid.
Missing argument for option “...”.
E_BAD_ARG - T he opt ion "..." has an invalid argument : "...".
Invalid argument specified for option “...”.
E_INI_KEY_SYNT AX - T he key "..." in t he configurat ion file "..." is invalid.
T he X Server vendor information in the configuration file is corrupt. Create a new configuration file.
E_INI_VALUE_SYNT AX - T he value "..." in t he configurat ion file "..." is invalid.
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T he X Server vendor information in the configuration file is corrupt. Create a new configuration file.
E_SERVER_NAMELOOKUP _FAILURE - Cannot connect t o server "...".
T he server name cannot be resolved.
Cannot writ e t o one or more files: "...". Correct any disk f ull issues or permissions problems and t ry again..
Check for disk full issues, or permissions problems. If a problem is found and corrected, retry the operation that prompted
the error message.
Server connect ion lost . Reconnect and t ry again. T hese files might be missing dat a: "...".
Reconnect and retry the operation that prompted the error.
If you are experiencing problems using Receiver, you may be asked to provide Technical Support with diagnostic information.
T his information assists this team in trying to diagnose the problem and offer assistance to rectify it.
To obtain diagnostic information about Receiver
1. In the installation directory, type util/lurdump. It is recommended that you do this while a session is open and, if
possible, while the issue is occurring.
A file is generated that contains detailed diagnostic information, including version details, the contents of Receiver's
configuration files, and the values of various system variables.
2. Check the file for confidential information before sending it to T echnical Support.
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SDK for Citrix Receiver for Linux
Mar 21, 20 17
Citrix Virtual Channel SDK
T he Citrix Virtual Channel Software Development Kit (SDK) provides support for writing server-side applications and clientside drivers for additional virtual channels using the ICA protocol. T he server-side virtual channel applications are on XenApp
or XenDesktop servers. T his version of the SDK provides support for writing new virtual channels for Receiver for Linux. If
you want to write virtual drivers for other client platforms, contact Citrix.
T he Virtual Channel SDK provides:
T he Citrix Virtual Driver Application Programming Interface (VDAPI) used with the virtual channel functions in the Citrix
Server API SDK (WFAPI SDK) to create new virtual channels. T he virtual channel support provided by VDAPI is designed to
make writing your own virtual channels easier.
Working source code for several virtual channel sample programs that demonstrate programming techniques.
T he Virtual Channel SDK requires the WFAPI SDK to write the server side of the virtual channel.
For more information on SDK, see Citrix Virtual Channel SDK for Citrix Receiver for Linux 13.5.
For information on command-line reference and parameters, see Citrix Receiver for Linux 13.5 Command Reference.
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