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Date:      Wed, 15 Nov 2000 20:34:41 +0100 (CET)
From:      "O. Hartmann" <ohartman@ipamzlx.physik.uni-mainz.de>
To:        freebsd-newbies@freebsd.org
Cc:        newbies@xfree86.org
Subject:   XDM broken in XFree 4.0.1!?
Message-ID:  <Pine.BSF.4.21.0011151957220.874-100000@ipamzlx.physik.uni-mainz.de>

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Hello.

I posted several question in the past in both FreeBSD newsgroups
and also in XFree newsgroup.

I have many tr trouble with XFree86 4.0.1_8 (as offered in FreeBSD
ports today). The problem regards to XDM, the display manager. XDM
seems to be not willing to forward XDMCP queries in version 4.0.1.

I tested this with a diskless X terminal, which is set up from FreeBSD
4.2 which boots FreeBSD and starts XFree86 as its X server with an
indirect query to a host running XDM only and offering several hosts
within our LAN. I use two of those hosts, each setup similar but
for testing purposes they run sometimes with different configurations.
XFree86 4.0.1 was either compiled with XDM-AUTHENTICATION-1 ON, SecureRPC
ON and PAM ON or with all three facilities off. I did several permutations
with the ON/OFF options of these parts, in all cases with no success.
The problem is: I can see all the hosts I want to be offered by the chooser 
on both XDM servers in the chooser, but I can not select one and connect
to the specified host! This fails to EACH HOST running 4.0.1! I have two
Linux systems running in my network (I do not know much about Linux, but
configuring X11 is the same task apart from slight differences in location
of the main distribution and starting XDM and X server). Linux bahves 
the same way like FreeBSD! Nor the host itself running the chooser can be
choosen from any host, nor is any host offered by the chooser of the 
linux XDM server choosable. XFree 4.0.1 interacts the same way when it is
acting to the same 4.0.1 version running X host/server! And I think I can
surely exclude any kind of filtering problems, because I switched off any
kind of filtering and other special authetication specialities both on Linux
and FreeBSD.

And now the curiosity: I have a third FreeBSD server, running FreeBSD 4.2
also like the two others, but due to an older graphics adaptor I must install
XFree86 3.3.6 on this machine. Well, I set up the same environment of hosts
and a chooser/XDM server for my LAN and tried to obtain a chooser from this
3.3.6-typed host from the same X terminal with could not gain access to any 
offered host. And now, using 3.3.6, it works! I tested then whether to gain 
access to any refused host by this X terminal and I really got access to each 
host by doing a direct query. I checked again Xaccess, but it was senseless because
the same configuration works under XFree 86 3.3.6. On the other hand: XFree86 3.3.6
alos offers SecureRPC, PAM and XDM-AUTHENTICATION-1 support and this to me
having no effect. 

Well, now I wish to know whether this is a well known bug in XFree 4 or has the
protocol been changed? I seems to me like forwarding does not work, neither on
Linux, nor on FreeBSD based XFree86 4.0.1 systems offering XDM/chooser. 


Is anybody out here who's already setup a configuration like mine? Server is
FreeBSD 4.2, XFree86 4.0.1_8 (FBSD ports) and Client is the same. X server
is started permanently on the client by X :0 -indrect destination_host using
ttyv0 as its bounding tty. 

On Linux the situation is similar, Linux Kernel 2.2.14, XFree 4.0.1. If the X server interacts
with an XFree86 4.0.1 XDM host, I can see all offered hosts, but I can not chooser 
on: after choosing a host, it seems that a connecting attempt has been commited 
but without success, chooser resets (screen is flashing, think its reseting) and
offers a new host list by pinging again each host. 

I use either the standard configuration or a specialized one with no authetication
schemes or similar difficulties.

Well, each help is appreciated, please email me if there are solutions for this 
problem or if anybody has the same problem. I twould be nice to hear from you if
you sucessfully set up the same configuration I use and how you did, thanks in
advance,

Oliver

-
MfG 
O. Hartmann
-------------------------------------------------------------------
ohartman@ipamzlx.physik.uni-mainz.de

Klimadatenserver-Abteilung des IPA 
IT Netz- und Systembetreuung
Johannes Gutenberg-Universitaet Mainz
Becherweg 21
D-55099 Mainz
BRD/Germany

Tel: +496131/3924662
FAX: +496131/3923532



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