Remote Desktop dengan FreeNX di CentOS release 5.2

Aplikasi remote desktop cukup banyak, yang menarik adalah FreeNX.
FreeNX merupakan implementasi free software dari NX server yang berasal dari teknologi NX NoMachine.
Teknologi NX diklaim dapat menghasilkan kecepatan akses melalui koneksi WAN dengan bandwith rendah ke komputer yang ingin kita remote,sama halnya seperti kecepatan koneksi yang dilakukan dalam jaringan LAN

[oracle@orcl4 /]$ cat /etc/redhat-release
CentOS release 5.2 (Final)

[root@orcl4 ~]# rpm -ivh /home/oracle/nxclient-3.4.0-7.i386.rpm
Preparing…                ########################################### [100%]
1:nxclient               ########################################### [100%]
Showing file: /usr/NX/share/documents/client/cups-info

CUPS Printing Backend

The NX Client set-up procedure detected that your “IPP CUPS” printing
backend doesn’t allow printing from the NX session. In order to have
printing support in your NX system, you need to set proper permissions
on the IPP backend. Please execute:

chmod 755 /usr/lib/cups/backend/ipp
[root@orcl4 ~]# chmod 755 /usr/lib/cups/backend/ipp
[root@orcl4 ~]# rpm -ivh /home/oracle/nxnode-3.4.0-11.i386.rpm
Preparing…                ########################################### [100%]
1:nxnode                 ########################################### [100%]
NX> 700 Starting: install node operation at: Fri Jun 04 11:12:49 2010.
NX> 700 Autodetected system ‘redhat’.
NX> 700 Install log is ‘/usr/NX/var/log/install’.
NX> 700 Creating configuration in /usr/NX/etc/node.cfg.
NX> 700 Inspecting local CUPS environment.
NX> 700 Generating CUPS entries in: /usr/NX/etc/node.cfg.
NX> 700 Installation of version: 3.4.0-11 completed.
NX> 700 Bye.

[root@orcl4 ~]# rpm -ivh /home/oracle/nxserver-3.4.0-12.i386.rpm
Preparing…                ########################################### [100%]
1:nxserver               ########################################### [100%]
NX> 700 Installing: server at: Fri Jun 04 11:12:59 2010.
NX> 700 Autodetected system: redhat.
NX> 700 Install log is: /usr/NX/var/log/install.
NX> 700 Creating configuration file: /usr/NX/etc/server.cfg.
NX> 723 Cannot start NX statistics:
NX> 709 NX statistics are disabled for this server.
NX> 700 Version ’3.4.0-12′ installation completed.
NX> 700 Showing file: /usr/NX/share/documents/server/install-notices

Server keys

The initial login between client and server happens through a DSA key
pair, i.e. a couple of specially generated cryptographic keys, called
the private key and the public key, which allow you to establish a
secure connection, by means of SSL encryption, between NX client and
NX server.

The public part of the key-pair is provided during the installation
of the server, while the private part of the key-pair is distributed
together with the NX Client. This ensures that each NX client is able
to authenticate to the server and to start the procedure for autho-
rizing the user and negotiating the session.

If you want to create a virtual private network (VPN) instead, you
need to generate a new DSA key-pair and distribute the private part
of the key-pair to those NX clients you want authenticated to the NX
server. More information on how to generate and distribute a new DSA
key-pair is available at:

http://www.nomachine.com/ar/view.php?ar_id=AR01C00126

Creating Users

NX is configured to allow access from any system user, as long as
valid credentials are given to the user for the SSH login. NX pro-
vides an alternative authorization method, allowing system admin-
istrators to determine which users are given access to the NX fun-
ctionalities. This works by implementing a separation between the
system password and the NX password, so that, for example, it is
possible to forbid remote access to the system by any other means
except via NX and use the NX tools to implement effective accounting
of the system resources used by the user, or to share NX passwords in
an external database.

To activate the NX user and password DBs, you will have to edit the
NX server configuration file by hand or use the NX Server Manager
Web tool available for download on the NoMachine Web site at:

http://www.nomachine.com/download-manager.php

Session Shadowing and Desktop Sharing

The session shadowing functionality allows you to share NX sessions
running on the node. The desktop sharing functionality instead, gives
access to the native display of the X server as if you were in front
of the monitor. By default you can access sessions in interactive mode
and upon authorization of the session owner. You can modify this beha-
viour by tuning the server configuration according to your needs, for
example by allowing access to sessions in view-only mode, or connecting
to either a suspended session or the local display via the Desktop
Manager login window.

Load Balancing

NX Advanced Server provides support for multi-node capabilities and
load balancing. In its current implementation, NX server can only
manage accounts on the host machine, so to grant access to the node
running remotely, you will need to create the user account directly
on the remote node host by issuing the NX node commands as root user.
You will also need to add the NX Server public DSA Key to the node to
allow this server to connect to the node running on the remote host.

Documentation

For further information on how to manage the configuration of your
NX system, please refer to the System Administrator’s Guide available
on the NoMachine Web site at:

http://www.nomachine.com/documentation/admin-guide.php

The NoMachine Team.

NX> 700 Bye.

dengan asumsi service sshd sudah jalan

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Tags: freenx, remote desktop, vnc, x11 forwading, xming