Take a look in xdm-config for something like this:
! SECURITY: do not listen for XDMCP or Chooser requests
! Comment out this line if you want to manage X terminals with xdm
DisplayManager.requestPort: 0
and comment out that line.
There is no good way to encrypt a full X session (where your machine is
just acting as an X terminal. What you could do, however, is run an
Xvnc instance *on the remote machine* and run vncviewer on your local
system, directing the vnc connection over ssh or something like that.
Note that this adds a lot of load to the machine in question as it not
only is running all your X clients, but the X server, too. But for
some situations, it's the best option.
-jan-
--
Jan L. Peterson
Unemployed "Computer Facilitator"
http://www.peterson.ath.cx/~jlp/resume.html
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BYU Unix Users Group
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