Remote desktop win to linux

remote desktop Win to linux
By Group 10

X-Window System Protocol
The X Window System Protocol, also known as X Window or X Protocol, is a graphics architecture used as the graphical system on Unix systems (primarily) and Linux systems.
X Window System (X Protocol) provides an inherently client/server oriented base for displaying windowed graphics.
It manage a video system including "interactive" I/O devices such as mice, keyboards, and some more unusual devices.
X Window System (X Protocol) has two primary versions: X10 and X11

X Window Display Manager
XDM (in full, the X Window Display Manager) is the default display manager for the X Window System. It is a bare-bones X display manager.
It was introduced with X11 Release 3 in October 1988, to support the standalone X terminals that were just coming onto the market.
It was written by Keith Packard.

GNOME Display Manager
GDM (the GNOME Display Manager) provides a simpler alternative display manager for the X Window System's XDM.
GDM allows users to customize or troubleshoot settings without having to resort to a command line. Users can pick their session type on a per-login basis.
GDM also features easy customization with themes.

GNOME Display Manager
GDM in Redhat 9.0 (Linux)

X Display Manager Protocol
XDMCP stands for "X Display Manager Control Protocol" and is a network protocol.
It provides a way of running the X-Terminal to run on your PC (or MAC) and it uses the X Server to provide a client/server interface between display hardware (the mouse, keyboard, and video displays) and the desktop environment while also providing both the windowing infrastructure and a standardized application interface (quoted from XFree86 Project home page).
The X-Terminal can be displayed with an individual window or multiple windows, based on your X window system's software capabilities and setup.

XDMCP & Gnome Display Manager (GDM)
GDM also supports the X Display Manager Protocol (XDMCP) for managing remote displays
GDM listens to UDP port 177 and will respond to QUERY and BROADCAST_QUERY requests by sending a WILLING packet to the originator.
GDM can also be configured to honor INDIRECT queries and present a host chooser to the remote display.
GDM will remember the user's choice and forward subsequent requests to the chosen manager.
Since it is fairly easy to do denial of service attacks on the XDMCP service, GDM incorporates a few features to guard against attacks.

Enable XDMCP on redhat
In Red Hat® Enterprise Linux® 4 and below the file /etc/X11/gdm/gdm.conf could be modified to enable xdmcp. With Red Hat Enterprise Linux 5, the location to enable xdmcp has changed.
There are two ways that xdmcp can be enabled:
Modify the file /etc/gdm/custom.conf and under the [xdmcp] section, add this line: Enable=true
Alternately, the tool gdmsetup can be used. This is a gui-based tool to modify gdm.
Once one of these two steps are done – simply run gdm-restart and then login as desired user.

Remote desktop Linux using XDMCP
Download Xming
Xming is an implementation of the X Window System for Microsoft Windows operating systems, including Windows XP, Windows Server 2003 and Windows Vista

Step 1:
Click “Next”and select “Open session via XDMCP”

Step 2:
Click “Next”

Step 3:
enter the IP address of your Linux Remote Host
in the “Connect to host” input box and “Next”

Step 4:
Click “Finish” button

Result:
Click “Finish” button

Config file /etc/ssh/sshd_config
Install PUTTY, It is a wonderful free SSH client .
*Note: Installed Xming
Remote desktop Linux via SSH with X11 Forwarding
X11Forwarding yes

Step 1: launch Xming
Click “Next” button to “Finish” ^^ , it will show below

Step 1:
Black screen
it will show below

Step 2: launch PUTTY
Click “Open” button

Step 3:
Click “Yes” button

Step 4: login to linux server
Click “Yes” button

Step 5: use gnome-session comand and tab to Xming window (black screen) to see result

Remote desktop win to linux

by phanleson

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