Zhang Weiwu wrote:
Rob wrote:
Zhang Weiwu wrote:
Hello. Now I have my /usr/X11R6/lib/X11/xdm/Xaccess contain (only) this:
* CHOOSER BROADCAST
according to xdm(1) this will enable XDMCP host chooser upon user
login. Now I reboot, xdm login box pops up, everything like it was
before.
I think it means any host can connect and asks in a broadcast.
If, on your network, a host does
X -broadcast
your machine will/may appear in the that machine's chooser list.
I don't really get you, I'm a xdm newbie;)
I am not sure of the inner machenism but in my local network
(192.168.0.0/24) everyone in the office use gdm and turned on XDMCP, so
you pick up a box with gdm login screen, select 'run host chooser' from
'system' menu, you will see all the computers in the office listed there
and I can pick up one to login. I believe this means they are all
broadcasting.
I don't know if it also allows an indirect request:
X -indirect <your X host>
Oh, and take also a note of this in xdm-config file:
! 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
What does this mean? I am running a slow box I don't need myself to be
listed in the host chooser of other boxes, but I need to be able to
login to other boxes.
I'm not an expert either, but I have some memories when I was fiddling
with X and xdm configuration. So take my advice was a pinch of salt.
The files /usr/X11R6/lib/X11/xdm/Xaccess and /usr/X11R6/lib/X11/xdm/xdm-config
are only for regulating access from other hosts to your PC. Apparently that's
not what you're interested in. For security reasons, it's then better to block
that access, since X is a rather insecure protocol.
So, if other computers are configured such that they answer broadcast requests,
or direct access request, you can simply type that from your PC.
You requesting a broadcast, should be something like:
X -broadcast
If you want to get a chooser from a specific host, then type:
X -indirect <host>
If you want to get directly to xdm on a specific host, then do:
X -query <host>
At least that's what I remember. Do "X -help" for all flags, such
as forcing a display 3 and/or virtual terminal 9 ("X :3 vt9").
However, once again, I may be wrong here in the details. Hopefully a more
knowledgeable person will give comments too.
Regards,
Rob.
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