RE: Problem with gdm and XDMCP

["Post, Mark K" <mark post eds com>]

With the help of a colleague, I discovered the problem.  A bunch of iptables
entries got created, where there had been none before, blocking connection.
"iptables -F" fixed the immediate problem.  From what I can tell,
lokkit-0.50-23 is the package responsible.  Now the question is why the
rules weren't there when I checked right after installation, but they are
now.  Any ideas about that?


Mark Post

-----Original Message-----
From: Post, Mark K 
Sent: Monday, August 04, 2003 10:56 AM
To: 'RHEL3 Beta'
Subject: Problem with gdm and XDMCP


Right after I installed RHEL3/B1 AS, I was using XDMCP from my Windows
desktop to bring up GNOME and KDE so that I could run up2date.  After
putting on a second set of updates, I can no longer connect via XDMCP.  My
X-Win32 client reports "XDM: too many retransmissions" after quite a long
wait.

I double-checked that the change I made to /etc/X11/gdm/gdm.conf was still
there:
[xdmcp]
Enable=true

But for some reason, I can't connect via XDMCP.  I can SSH in and run X
applications just fine.  I even ran gdmsetup to see if anything would get
changed in gdm.conf, but it wrote out exactly what I already had there.

Then, I tried something odd, just to see what happened.  My gdm.conf file
shows
# Greeter for xdmcp logins, usually you want a less graphically intensive
# greeter here so it's better to leave this with gdmlogin
RemoteGreeter=/usr/bin/gdmlogin

So, I tried invoking /usr/bin/gdmlogin from my SSH session.  What I got was
an error screen on my X-Win32 display that says:
The greeter version (2.4.1.3) does not match the daemon version.
You have probably just upgraded gdm.
Please restart the gdm daemon or reboot the computer

But, I had rebooted in an attempt to see if that helped.  And, all the date
and time stamps for the gdm binaries match, and an "rpm -V gdm" only shows
the gdm.conf file as being different.

Anybody have any ideas what might be wrong here?


Mark Post