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From: Khairil Yusof <kaeru@inigo-tech.com>
To: Sebastian Nowicki <nowickis@volt.iem.pw.edu.pl>
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Date: Tue, 31 Jul 2007 08:33:27 +0800
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Cc: freebsd-gnome@freebsd.org
Subject: Re: gdm remote connection
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On Fri, 2007-07-27 at 17:10 +0200, Sebastian Nowicki wrote:
> Hi,
> I'm trying to configure gdm, so I can connect to my server remotry.
> But when I'm connection from another server to my server (X -query 
> <HOSTNAME>) I have only grey screen, no login window.
> Xdmcp is enabled. I don't understand what is wrong.
> I'm attaching my gdm configuration file.
> Thanks for any kind of help.

Try it from the simplest configuration first.

in custom.conf only have this option enabled:

[xdmcp]
Enable=true

Then restart gdm.

Check that it's listening on udp/177 using sockstat -l4 (or 6 if on
ipv6).

Check that you can connect to it locally, try Xnest :1 -query localhost

Finally check with a remote client.

By running make config in x11/gdm check whether it was built with ipv6
option checked. There are some reports, that clients compiled with ipv6
may fail to connect to ipv4 gdm servers even if they're both on ipv4
network.

I know that current gdm is working ok for xdmcp serving clients to
Ubuntu 6.0.6 and 7.04 clients, as well as other FreeBSD clients.

Hope this helps.