Hi Anders, Thanks for replying. See my comments below: Anders Johansson skrev:

On Wed, 2004-02-18 at 02:23 +0100, Terje J. Hanssen wrote:

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hostC% setenv DISPLAY hostA:0

Did you verify that the display in use really is :0?

As mentioned in my first mail, hostA is set up like a X terminal to start the X server and query for a remote login screen from hostB directly, without local user login to hostA first. This is achieved by adding the following entry in hostA's /etc/inittab: X :0 -nobanner -query hostB How is it possibly to check afterwards that the display in use is :0?

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hostC% XclientApp

The following typical error messages are displayed and theXclientApp doesn't start up or is not displayed on hostA:

Xlib: connection to hostA:0 refused by the server Xlib: Invalid MIT-MAGIC-COOKIE-1 key

Something is obviously wrong, since the "xhost hostC" should have turned off cookie based authentication for hostC

As I have no local login to hostA, I created a minimal xhost access file on hostA instead containing hostB and hostC: /etc/X0.hosts Now I was able to get dtterm running on remote application hostC to be displayed on my local X display hostA. But still I get the same error when trying to start my CAD application on remote hostC: Xlib: connection to hostA:0 refused by the server Xlib: Invalid MIT-MAGIC-COOKIE-1 key What is special is that the Cad application use its own software defined workstations, where wsA is set up with a graphical remote X display on hostA and take input from its remote tablet. Maybe this can come into some conflict with be or be dual (over)defined through the user command: hostC % setenv DISPLAY hostA:0 This command was mostly thougt to get displayed the text menue for starting the Cad system and more in a terminal window. I have to look some nearer at this.

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A rlogin to hostA also confirmed that: X: client is rejected from IP_of_hostA

I'm not sure I understand that sentence

Sorry, this was my mistake. It should be 'rlogin hostC', which is the remote Xapps execution host. Terje