Configured?...... It just works like this. You imply some degree of 'control' and knowledge which I don't possess!
Client is usually a PC from which the user makes a telnet sesssion to the LINUX box to start a task - and also runs an Xserver (the free MIX one) locally.
These kind of X servers tend to default to allowing connections from anywhere. (Which is a rather different situation from the default on a unix type system.)
We also use Acorn clients which connect via xdm. But anyone can seemingly 'send' tasks to the screen.
You'll need to check the documentation for the specific servers you are using. It should certainly be possible to use either xhost or xauth with them, but the exact details of how you do it are implimentation specific. -- Mark Evans St. Peter's CofE High School Phone: +44 1392 204764 X109 Fax: +44 1392 204763