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Cannot Telnet or XDMCP to Centos 5.3 dashboard

Posted on 2009-04-13
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Last Modified: 2013-12-21
I can ping this server but that is all.  Please advise.
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Question by:rtod2
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by:ai_ja_nai
ID: 24133169
what do you insert in the XDM login manager? and what error message does it give back to you?
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by:rtod2
ID: 24133737
Where do I find the XDM login manager?
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by:ai_ja_nai
ID: 24136526
if you are trying to login via xdmcp, you must be using GDM, KDM or XDM, right? it's the login screen of a X session
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Author Comment

by:rtod2
ID: 24143699
I selected all the options on install of Centos 5.3.  Whatever it defaulted to is what I have.  It is at work or I would check now.  A step-by-step on how to enable the telnet and xdmcp for the box is helpful if you can provide it.  I am 'very' unfamiliar with Linux.  In fact, this is my first attempt at loading a Linux system.
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by:ai_ja_nai
ID: 24146821
you can't start with mountains climbing if you don't even know how to walk in plains :)

When the graphical login screen opens up (and it asks for user and password) there should be an Option button. Clicking on it displays a curtain menu. Can you tell me the available options?

(Unless you are in a pure command line mode; in this case, you want to use ssh to login into the remote server)
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by:rtod2
ID: 24274326
I am in GNOME
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by:ai_ja_nai
ID: 24278602
Ok, what happens if you click on the option button BEFORE logging into GNOME? You should see a "Remote desktop" or "XDMCP" option

BTW, do you actually have to login or are you automatically thrown to the desktop without any passwords?
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Author Comment

by:rtod2
ID: 24300231
I can now telnet but XDMCP isn't working.  If I am sitting at the console, GNOME comes up automatically.  When running xming, I can get a text interface that will let me start gui applications.  When selecting xdmcp though (for access to the GNOME dashboard), no luck.
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by:ai_ja_nai
ID: 24305680
Ok, I see (maybe)
In GNOME, go to System->Administration->Login Screen
In the Remote tab enable remote logins
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Author Comment

by:rtod2
ID: 24310856
Excellent.  I will give that a try first thing!
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Author Comment

by:rtod2
ID: 24348572
Thank You!   That got me part way.
I am now able to connect to the graphical login screen just as if I were sitting at the console and even apparently able to log-in.  

After logging in though (having successfully used your suggestion above), I am now presented with a black screen and a CURSOR!  This cursor and black screen is good news because before, I could not get that far and like I was saying, it appears to have taken my login.

What now?
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by:ai_ja_nai
ID: 24350181
..er, yes, but you would be supposed to see even the wallpaper and the icons :D
Something went definetely wrong... do you have ATI proprietary drivers?
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Author Comment

by:rtod2
ID: 24350234
I do not know if the drivers are ATI or not.  I just let the CentOS 5.3 installation do the work.  I did not load additional drivers.
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by:ai_ja_nai
ID: 24350328
Yes but... on which hardware are you running?
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Author Comment

by:rtod2
ID: 24350392
Sorry.   It's a Dell PowerEdge 2950
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by:ai_ja_nai
ID: 24353212
And does GNOME works flawlessly on that PowerEdge?
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Author Comment

by:rtod2
ID: 24353777
Yes.  From what I can tell, everything works like a charm.  I had considered xhosts+ or something.  Not sure how to use that command.  I'm not convinced it is a driver issue.  I chose to install KDE also but not sure how to begin using it.
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ai_ja_nai earned 500 total points
ID: 24353843
It could be a Xming issue. Try with Cygwin/X
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Author Comment

by:rtod2
ID: 24360139
I need it to be portable and under 1gb (the size of the thumb drives we are issued).  cygwin/x is a HUGE application.
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by:ai_ja_nai
ID: 24361988
But Xming doesn't work :) You get to connect to X, but the window manager won't come up. What good is that going to do? And are you sure it's such a huge package? You just have to select xinit, during installer
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Author Comment

by:rtod2
ID: 24362724
The biggest barrier i think is that I am largely a windows guy and new to the world of unix.  I've contracted an outsourcer to see if he can figure out how to get xming to do this in his environment.  I really need to use the thumb drive app if possible.
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by:ai_ja_nai
ID: 24372701
Cygwin/X will fit in 1GB, for sure. My Ubuntu Linux has full blown 3d fps games installed , office suite, browsers, security patches, media players and stuff and still it fits into 5GB. Give it a try.


OR, you could use a pendrive installed Linux, so that you can use natively XDMCP and log in in every system with a live distro
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Author Comment

by:rtod2
ID: 24377904
Maybe I did something wrong then.  Can you provide a link to what you are using because cygwin/x for me is huge?  What steps (1.2.3) are needed to get it on a thumb drive?
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by:ai_ja_nai
ID: 24378130
how about the user's guide on Cygwin/X website?
http://x.cygwin.com/docs/ug/setup-cygwin-x-installing.html
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Author Comment

by:rtod2
ID: 24378790
I did figure out how to get it on a thumb drive.  XCygwin with the XInit package appears to fit on a thumb drive at just over 150MB which is plenty small for my purposes.  

Back to my previous question though about accessing the dashboard.  It appears that cygwin will allow me to access xwindows GUIs such as xclock many other x11 related GUIs.  The dashboard is different and I am still unable to view that as I get the std dos-like black window with XCygwin.
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Expert Comment

by:ai_ja_nai
ID: 24379307
It's because you are in multiwindow mode.
Try running:
XWin.exe -query <put remote ip address here>

Open in new window

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Author Comment

by:rtod2
ID: 24379494
Ah OK, perfect...  getting closer.

So I now have the current cygwin.bat file:
@echo off
chdir bin
bash --login -i

You are simply suggesting to change it from bash to xwin.exe -query ip, which works perfectly.  I'll experiment.  Thanks very much for that.  So my guess is that I will either a number of batch files, or a number of items in the batch file.  I'd like to have a menu where I could make friendly names for all the options.  In the case of the above I might have:

1) Std Bash Prompt
2) MachineX Gnome Dashboard

Others might be:
3) MachineY CShell
etc...

I could then simply select the option I wanted.  I'd also like to get the dashboard via SSH or SSH2 as opposed to XDMCP.
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Author Comment

by:rtod2
ID: 24379522
Ah OK, perfect...  getting closer.

So I now have the current cygwin.bat file:
@echo off
chdir bin
bash --login -i

You are simply suggesting to change it from bash to xwin.exe -query ip, which works perfectly.  I'll experiment.  Thanks very much for that.  So my guess is that I will either a number of batch files, or a number of items in the batch file.  I'd like to have a menu where I could make friendly names for all the options.  In the case of the above I might have:

1) Std Bash Prompt
2) MachineX Gnome Dashboard

Others might be:
3) MachineY CShell
etc...

I could then simply select the option I wanted.  I'd also like to get the dashboard via SSH or SSH2 as opposed to XDMCP.
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Author Closing Comment

by:rtod2
ID: 31569610
You are a GOD!  You were absolutely correct.  Please find my follow-up question here http://www.experts-exchange.com/OS/Linux/Distributions/CentOS/Q_24406642.html
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Expert Comment

by:ai_ja_nai
ID: 24380331
Thanks, you do me too much honour :)
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