Re: XDMCP Problems - Possible fix, please try

[Andrew DeFaria <ADeFaria at Salira dot com>]

Harold L Hunt II wrote:

> Andrew DeFaria wrote:
>
> > > I never thought of forcing people to try to make a connection on the 
> > > actual box itself.
> > >
> > > I ran the same command on my linux box and confirmed that it does work.
> > >
> > > I then edited (for my display manager and distribution, this will be 
> > > different for you) /etc/kde3/kdm/kdmrc, changed the following:
> > >
> > > [XDMCP]
> > > Enable=true
> > >
> > > to
> > >
> > > [XDMCP]
> > > Enable=false
> > >
> > > Then I restarted kdm ('/etc/init.d/kdm restart' for my dist), and 
> > > ran 'X -query %hostname% :1' again and waited about five minutes.  
> > > Before five minutes, I saw nothing: nothing special in the log files 
> > > and no login screen on Ctrl-Alt-F8.  Then, after about five minutes, 
> > > I saw that the /var/log/XFree86.1.log file (and the console from 
> > > which I started X) both said:
> > >
> > > XDM: too many retransmissions
> >
> >
> >
> > Well you see that's sorta the problem. In my distro (SuSE 8.2) it's 
> > at /opt/kde/share/config/kdm/kdmrc but the problem is that it already 
> > says true! In mine is says:
> >
> > [Xdmcp]
> > Enable=true
>
> kdm != xdm
>
> kdm has a distinct configuration file from xdm's configuration file.

Yes but there appears to be some intertwining on SuSE at least.

> xdm.config lives in either /etc/X11/xdm/xdm.config or 
> /usr/X11R6/lib/X11/xdm/xdm-config, where you will see something like 
> the following:
>
> ! 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
>
>
> So, you have to change that to:
>
> ! 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
>
> Then restart xdm and it should work.

sonslinux:/home/defaria # grep requestPort /etc/X11/xdm/xdm-config
!DisplayManager.requestPort:    0
sonslinux:/home/defaria # grep requestPort 
/usr/X11R6/lib/X11/xdm/xdm-config
!DisplayManager.requestPort:    0
sonslinux:/home/defaria #

Actually:

sonslinux:/home/defaria # ll /usr/X11R6/lib/X11/xdm
lrwxrwxrwx    1 root     root           23 2003-12-12 15:29 
/usr/X11R6/lib/X11/xdm -> ../../../../etc/X11/xdm

And DisplayManager.requestPort had been commented out a long time ago 
(and xdm/kdm definitely has been restarted since commenting this out).
--
The careful application of terror is also a form of communication.