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Released on:
Searching in: Software Updates
ID: SU01O00180
Released on:  2017-02-01
Last update: 2017-02-10
OpenSSL security update

Luxembourg, February 1st, 2017

NoMachine is pleased to announce the immediate availability of version 5.2.11 which consolidates fixes and implementations made on the 5.1.0 branch. This release also delivers usability improvements such as providing an option to set the maximum number of applications running in a virtual Linux desktop and optimizations to the fail-over procedure in NoMachine Cluster environments.

Additionally, 5.2.11 includes a security update of OpenSSL (CVE-2017-3731) recently released to fix an out-of-bounds read flaw which could be exploited by a remote attacker to crash a 32-bit TLS/SSL server or client using OpenSSL. All customers are invited to update their NoMachine client and server installations. Version 4 customers please consult the announcement here.

IMPORTANT: This is the final scheduled update of the NoMachine 5 series in preparation for the upcoming version NoMachine 6. Aside from new functionality, this next milestone in our development roadmap will introduce some important changes in the NoMachine for Enterprise product structure.


The complete list of features implemented in version 5.2.11 are:

FR03N03077 - Add the 'Fullscreen on all screens' button to the client when session is not running
FR10M02972 - Providing a server tool to help users collect logs
FR08N03172 - Optimizations to the procedure for restoring the active/passive roles in a NoMachine Cluster after failover
FR11N03272 - Providing an option to set the maximum number of applications running in a virtual desktop
FR11N03262 - Supporting Kerberos authentication for connections by NX protocol in NoMachine Cluster environments
FR03N03085 - Giving the possibility to change audio settings in web sessions
FR12N03276 - Muting audio on the server for web sessions connected to the physical desktop

This latest release also provides the following fixes:

TR01N06334 - NoMachine doesn't work on Windows when the user's name contains non-latin characters
TR05N06897 - The virtual desktop suddenly terminates when moving the Chrome window
TR08N07114 - Cannot delete a domain user from a NoMachine group
TR10N07249 - Virtual desktops are terminated forcibly when the tcsh shell is used
TR02N06431 - NoMachine installation process hangs on Windows 8 when path exceeds 64 chars
TR07N07081 - Copy and paste doesn't work in floating window session
TR05N06887 - Localhost is still present in the physical desktop list even if it has been removed from the available nodes
TR11N07345 - Dialogs do not stay on top of the primary window of a Java application
TR11N07358 - Login input fields are too small when connecting via web from Safari
TR08N07113 - Cannot authenticate to the Server preferences GUI when username contains '('
TR11N07351 - NoMachine GUI has the "Automatically check for updates" option enabled even if the update frequency is set to 0 in the server configuration
TR11N07370 - The client GUI's username field is filled with the Kerberos Principal when authenticating by NX protocol and Kerberos tickets
TR12N07388 - The "Disable client side hardware decoding" checkbox is always disabled when connecting a custom session
TR05N06899 - Cannot start a new virtual desktop after a certain period of activity
TR12N07403 - Num Lock is out of sync in a NoMachine session
TR12N07406 - Session log is filled with "can't get renewed kerberos credentials" messages
TR12N07418 - Display server could terminate unexpectedly when the available shared memory on the system is exhausted
TR11N07369 - The / key is wrongly mapped when connecting from Safari
TR11N07360 - Fedora 25 SELinux blocks nxserver.service from being launched by systemd
TR01O07501 - NoMachine tray icon is not visible on Elementary OS
TR09N07170 - Cannot create a new XDM virtual desktop
TR01O07499 - Error "the Nomachine service is not available or the access was disabled" occurs when connecting by 'NoMachine login'
TR01O07524 - The scrolling for viewport mode cannot be completely disabled
TR01O07505 - Activating NoMachine client window causes unexpected Spaces switching
TR09N07202 - Cursor becomes invisible after typing inside remote Parallels VM
TR08N07115 - Polish characters copied from a custom session are not correctly decoded on Windows


Supported Platforms

Windows 32-bit/64-bit XP/Vista/7/8/8.1/10

Mac OS X Intel 64-bit 10.5/10.6/10.7/10.8/10.9/10.10/10.11

Linux 32-bit and 64-bit

Red Hat Enterprise 4/5/6/7
SLED 10.x/11.x
SLES 10/11/12
Open SUSE 10.x/11.x/12.x/13.x
Mandriva 2009/2010/2011
Fedora 10/11/12/13/14/15/16/17/18/19/20/21/22/23/24
Debian GNU Linux 4.0 Etch/5.0 Lenny/6.0 Squeeze/7.0 Wheezy/8.0 Jessie
Ubuntu 8.04 Hardy Heron/8.10 Intrepid Ibex/9.04 Jaunty Jackalope/
9.10 Karmic Koala/10.4 Lucid Lynx/10.10 Maverick Meerkat/11.04 Natty Narwhal/
11.10 Oneiric Ocelot/12.04 Precise Pangolin/12.10 Quantal Quetzal/13.04 Raring Ringtail/
13.10 Saucy Salamander/14.04 Trusty Tahr/14.10 Utopic Unicorn/15.04 Vivid Vervet/15.10 Wily Werewolf/16.04 Xenial Xerus


Important: Due to the changes introduced by Apple which has dropped support for 10.5 and 10.6 in recent compilers, NoMachine will discontinue support for those OS X versions in a future release. It will still be possible to request packages specifically built for 10.5 and 10.6 under the provisions of a support contract.


Download NoMachine Packages

You can download the latest packages suitable for your Operating System from the NoMachine Web site at the following URL:

Customers with valid subscriptions should log in to their customer area and download the "Update version".

Automatic updates

The automatic check for updates is scheduled to check our repositories every two days.

To update any of the NoMachine servers immediately:

- Run the NoMachine GUI from your Programs Menu.

- Click on 'Settings', then on the 'Server preferences' and finally on 'Updates'.

- Then click on the 'Check now' button.

To update the NoMachine Enterprise Client immediately:

- Click on 'Settings' and 'Updates'.

- Then click on the 'Check now' button.

More information about the check for automatic updates is available here:

Manual package update

Please follow the instructions to update your installation manually:

On Windows:

- Download and save the EXE file.
- Double click on the NoMachine executable file.
- As for the installation, the Setup Wizard will take you through all steps necessary for updating NoMachine.

On Mac OS X:

- Download and save the DMG file.
- Double-click on the Disk Image to open it and double-click on the NoMachine program icon.
- As for the installation, the Installer will take you through through all steps necessary for updating NoMachine.

On Linux:

You can use the graphical package manager provided by your Linux distribution or update NoMachine by command line by following instructions below.
If you don't have the sudo utility installed, log on as superuser ("root") and run the commands without sudo.


- Download and save the RPM file.
- Update your NoMachine installation by running:

# rpm -Uvh <pkgName>_<pkgVersion>_<arch>.rpm


- Download and save the DEB file.
- Update your NoMachine installation by running:

$ sudo dpkg -i <pkgName>_<pkgVersion>_<arch>.deb


- Download and save the TAR.GZ file.
- Update your NoMachine installation by running:

$ cd /usr
$ sudo tar xvzf <pkgName>_<pkgVersion>_<arch>.tar.gz
$ sudo /usr/NX/nxserver --update

If you are installing Enterprise Client or Node run respectively:

$ sudo /usr/NX/nxclient --update
$ sudo /usr/NX/nxnode --update



Installation and configuration guides for the NoMachine products are available at:


The NoMachine Security Team