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Old 12-18-2009, 12:26 PM   #1
pyroman59
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Exceed xterm connect capability


Hi all -

Another basic question, as I am still new to Linux...

I have a new machine loaded with RHEL 5.2 and when I try to connect into it using EXCEED XDMCP-Broadcast mode from my PC, it never comes up as a selection in the select-list. What rpms, procs, etc. am I missing on my RHEL 5.2 system???
 
Old 12-18-2009, 05:27 PM   #2
TB0ne
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Quote:
Originally Posted by pyroman59 View Post
Hi all -

Another basic question, as I am still new to Linux...

I have a new machine loaded with RHEL 5.2 and when I try to connect into it using EXCEED XDMCP-Broadcast mode from my PC, it never comes up as a selection in the select-list. What rpms, procs, etc. am I missing on my RHEL 5.2 system???
That's because as a rule, running X that way is fairly unsafe. Your X server is running with the "-nolisten" option (do a "ps -ef | grep nolisten"), which means it's not going to accept X requests from anyone but itself.

From the RedHat knowledgebase:
https://www.redhat.com/docs/manuals/...e-remotex.html
 
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Old 12-18-2009, 06:56 PM   #3
pyroman59
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If I do that ps cmd, I do not see an "X server" proc

[root@larry ~]# ps -ef|grep nolisten
root 6035 6006 0 15:57 pts/1 00:00:00 grep nolisten
[root@larry ~]#
 
Old 12-18-2009, 07:11 PM   #4
MBybee
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With Exceed, are you connecting via Telnet, or using something like PuTTY?


<edit>
Let me make that more clear...
For me, here, I have Exceed on some of the Windows terminal servers. We use PuTTY to connect via SSH (no Hummingbird SSH yet that I know of), and then when we launch the remote X services (like xclock) it comes back via an SSH-Tunnel.

In PuTTY, you'd need to set 'Enable X11 Forwarding'.
I would have to look up the instructions for Exceed via Telnet, haven't used telnet that way in ages.

Even better doc: http://faq.rutgers.edu/?q=node/836
</edit>

Last edited by MBybee; 12-18-2009 at 07:16 PM.
 
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Old 12-18-2009, 07:14 PM   #5
pyroman59
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Right now I just connected to the Linux machine via rlogin from a Sun Ultra 60.
 
Old 12-18-2009, 07:37 PM   #6
pyroman59
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Here is what I do currently:

1. From my PC, I launch Exceed XDMCP-Broadcast and login to an Ultra 60

2. Once on the Ultra 60, I open a cmd tool shell, and rlogin or telnet to the Linux machine.


Here is what I want to do:

1. Launch Exceed XDMCP-Broadcast, and when the DISPLAY MANAGER CHOOSER MENU comes up, I want to see my Linux machine in the pick-list of hosts...

2. Click on that Linux machine

3. Get the Linux-GUI-console-login-screen on my Exceed session console

4. Login and get my desktop and such...
 
Old 12-19-2009, 12:37 PM   #7
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Here's a howto for XDMCP: http://www.faqs.org/docs/Linux-HOWTO/XDMCP-HOWTO.html


That being said, I would not recommend using XDMCP broadcasts, telnet, or rlogin on any modern network. These are non-secure services and almost always locked at the firewall and host level in a well-secured network.

Also, you typically don't want to waste server resources running a full X desktop, but that's beside the point.
 
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Old 12-21-2009, 11:24 AM   #8
pyroman59
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Hi MBybee -

Thanks for the info, I appreciate it. This lone Linux machine I have loaded is going to soon be moved into a closed area with no network at all - it will be a total sandalone machine. Otherwise, I would be concerned about security, etc.
 
Old 12-22-2009, 01:01 PM   #9
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Quote:
Originally Posted by pyroman59 View Post
Hi MBybee -

Thanks for the info, I appreciate it. This lone Linux machine I have loaded is going to soon be moved into a closed area with no network at all - it will be a total sandalone machine. Otherwise, I would be concerned about security, etc.
Ah - well, there you go
If that handles your issue, you may want to mark the thread solved. That way others with similar issues will be more apt to find it.

Happy Holidays!
 
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Old 12-22-2009, 04:07 PM   #10
pyroman59
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Smile

As an additional note, I used this info (below) as well, and got XDMCP to work. I got the login screen on my PC Exceed session!

http://www.idevelopment.info/data/Un...HatLinux.shtml

Thanks!
 
  


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