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On the web interfaces of the ecaccess gateways, e.g. at http://ecaccess.ecmwf.int, users have the option to establish an NX connection by using a Web applet which will download an NX client to be used by their Web browser. However, the NX3 client is no longer supported by NoMachine and uses a self signed certificate which has expired. For these reasons, depending on your individual configuration, you might run into problems when trying to use NX3 from your browser. |
A service using the NX technology allows users to run at ECMWF X Window based applications like Metview, XCdp, or a simple xterm. The easiest way to use this service is via a web browser, see How to connect using a web browser 83396168
It is also possible to connect using a standalone NX client application completely independent of any web browser, see Example of session starting a standalone xterm on the supercomputer 83396168. A similar service is available through the ECaccess gateway "msaccess.ecmwf.int" and through your local gateway provided that you have installed the ECaccess gateway v3.3.0 at least.
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The window manager available on this desktop is called WindowMaker. By right clicking on the mouse you will get an Application Menu which allows you to start an xterm or other X based applications. The main desktop window is a standalone X Window and can be minimised. If you prefer, you can start a virtual desktop in full screen mode by choosing the "Virtual desktop resolution" option "full screen". See WindowMaker Overview below for more details.
How to connect using a standalone NX client
In addition to using the web browser based access to ECMWF via NX described previously, you can also download a standalone NX client. To To do this, go to www.nomachine.com/download and select you will need to install the NX client for your platform. Please note that we are aware of problems when trying to connect to ecaccess with the most recent versions of this software obtained from www.nomachine.com/download. Therefore users are currently advised not to use the latest versions available from the NoMachine website. Instead they can get the latest working version form ECMWF's ecgate:
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$>sftp uname@eccaccess.ecmwf.int
$>cd ECHOST/ecgate/perm/us/usd/public/NOMACHINE_CLIENTS
$>get nomachine-enterprise-client_5.1.54_1_x86_64.tar.gz #(for Linux) |
In the same directory, NoMachine clients for Windows (nomachine-enterprise-client_5.0.53_7.exe) and for macOS (nomachine_4.0.369_6.dmg) are also available.
The installation is quite straightforward and is described in more The installation is quite straightforward and is described in more detail at www.nomachine.com/all-document. You can then use the "Download session file" option available through the web interface:
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If you then click "Ok" you will be able to start your session. In this case you will get a standalone xterm on ecgate. Depending on your firewall setup you may get various warning messages. You will need to authorise all sessions from anything related to NX (nxclient, nxauth, nxssh, etc).
If you have a new openssh installed on your machine, it might fail due to ciphers. To address this, modify in ~/.nx/config/player.cfg:
"SSH client mode" value = "native" instead of "library".
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