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Re: Remote X sessions



Thanks for pointing me in the right direction Royce.

In the KDE system tray if I click on the applications icon, 
and then go to System->Remote Access->Desktop Sharing I can 
create a personal invitation for others to share my desktop.
This creates login details such as remote machine IP address 
and password.

On the other machine I can login to the first machine with 
System->Remote Access->Remote Desktop Connection, using the 
system generated details mentioned above.

This initiates the connection to the first machine.

I have actually disabled and shut down xdm in my run-level 
editor, and I can still connect to the machine. It may be 
that the KDE Remote Desktop VNC server is an integral part 
of KDE?

Here is an extract from the help pages:

Chapter 1. Introduction

Desktop Sharing is a server application that allows you to 
share your current session with a user on another machine, 
who can use a VNC client to view or even control the 
desktop.

You would typically use Desktop Sharing with the KDE VNC 
client, which is Remote Desktop Connection, since it closely 
matches the special features of Desktop Sharing. 

Desktop Sharing doesn't require you to start a new X session 
- it can share the current session. This makes it very 
useful when you want someone to help you perform a task. 

Chapter 2. The Remote Frame Buffer protocol

This chapter provides a brief description of the Remote 
Frame Buffer protocol used by Desktop Sharing and by other 
compatible systems. If you are already familiar with Remote 
Frame Buffer, you can safely skip this chapter.

The high level implementation of a system using the Remote 
Frame Buffer protocol is known as Virtual Network Computer, 
or more often just as VNC. 

Remote Frame Buffer (or RFB for short) is a simple protocol 
for remote access to graphical user interfaces. It works at 
the frame-buffer level, which roughly corresponds to the 
rendered screen image, which means that it can be applied to 
all windowing systems (including X11, Mac® OS and 
Microsoft® Windows®

Thanks to everyone who replied with suggestions, especially 
to Royce for pointing me in the right direction.

I found it quite informative reading up on the X11 window 
server.

Regards

Keith Roberts


On Fri, 6 Oct 2006, Royce Souther wrote:

> To: xfree86@xxxxxxxxxxx
> From: Royce Souther <Royce.Souther@xxxxxxxxxxxxxx>
> Subject: [SPAM] Re:  Remote X sessions
> 
> If you just want one app you would do this.
> ssh -X user@main xclock
> 
> If you want to login to the desktop you would need to 
> enable XDMCP. In Suse the best way to do that is use the 
> GDM programs. On the main system login open a shell and su 
> to root ( you may need to run sux ) and try to run 
> gdmconfig. I say try because Suse like to rename things 
> just to mess people up. The may have called it gdm-config, 
> gdmsetup, gdm-configure of something like that. Use that 
> to enable XDMCP serving, much better them manually editing 
> the confing file that Suse also has renamed an moved some 
> place else. If you cannot find it the GDM login screen may 
> let you configure it if you click on System.
> 
> Then on your laptop go to your GDM login screen and click 
> on system, there should be an XDMCP option. This should 
> let you browse your network for any XDMCP servers that are 
> running.
> 
> This is not encrypted so if you need SSH then you will 
> need to do some more reading.
> 
> On Fri, 2006-10-06 at 16:05 +0100, Keith Roberts wrote:
> 
> > Hi all. I'm running SuSE 9.2 pro on my laptop and main 
> > machine. I would like to run a remote X session on my main 
> > machine, and have the X session displayed on my laptop.
> > 
> > I have got as far as doing a ssh login to the main server 
> > from my laptop, and then running:
> > 
> > ssh$ xclock -display :0
> > 
> > which allows me to start the xclock on my main machine, via 
> > ssh on the laptop.
> > 
> > Does anyone have any pointers to tutorials on how to get the 
> > X session output displayed on my laptop please?
> > 
> > Obviously I have CLI remote login functional with ssh. I 
> > really need a remote X login to my main machine, with the 
> > apps runing on that, and the Xsession displayed on my 
> > laptop. I've read about XDMCP, xdm, but I'm still not sure 
> > how to put all this together.
> > 
> > I have a firewall running on both boxes - I have opened up 
> > access so packets should move between each machine via the 
> > router.
> > 
> > Do I need X listening on my laptop for TCP/IP connections? 
> > Or is it UDP packets on port 177?
> > 
> > TIA
> > 
> > Keith Roberts
> > 
> > ------------------------------------------------------------
> > http://www.karsites.net
> > http://www.raised-from-the-dead.org.uk
> > 
> > This email address is challenge-response protected with 
> > http://www.tmda.net
> > ------------------------------------------------------------
> > _______________________________________________
> > XFree86 mailing list
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> > http://XFree86.Org/mailman/listinfo/xfree86
> > 
> 
> 
> Royce Souther
> www.SiliconTao.com
> Let Open Source help your business move beyond.

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