RE: XDMCP?

["Paul Gillooly" <pgillooly es alpnet com>]

Hello,

I have included the two messages below referring to XDMCP since
they confuse me, in one it seems you are saying that it is
possible to do XDMCP (using the chooser, how else is it useful?)
in the other you say it is impossible. Now please forgive me if
this is really silly but can I setup GDM so that I can startup
Linux on my machine and use it to login (and start an X session)
on a Sun machine downstairs?

Thanks, Paul.


> -----Original Message-----
> From: Martin K. Petersen [mailto:mkp sunsite auc dk]
> Sent: Sunday, April 16, 2000 2:49 PM
> To: dforrest virginia edu
> Cc: gdm sunsite auc dk
> Subject: Re: a FAQ? How dos one make gdm do XDMCP?
> 
> 
> 
> >> GDM is a standalone daemon which uses the tcp wrappers library for
> >> access control.
> 
> David> So this means that it is its own daemon, and it uses the
> David> entries in hosts.allow and hosts.deny, but not inetd.conf?  
> 
> Yep. GDM uses the tcp wrappers *library*, not the tcpd daemon.
> 
> 
> David> So the output from '/usr/sbin/tcpd -a -v' which warns as shows
> David> below is acceptable?
> 
> Looks alright, yes.
> 
> -- 
> Martin K. Petersen	Principal Linux Consultant, Linuxcare, Inc.
> http://mkp.net/		XFS, Linux/PA-RISC, GNOME, SunSITE Denmark
> 
> 

> -----Original Message-----
> From: Martin K. Petersen [mailto:mkp mkp net]
> Sent: Wednesday, April 19, 2000 11:04 AM
> To: Soeren Thing Andersen
> Cc: gdm sunsite auc dk
> Subject: Re: More XDMCP problems.
> 
> 
> >>>>> "Soeren" == Soeren Thing Andersen <thing control auc dk> writes:
> 
> Hi there,
> 
> Soeren> I run gdm (ver. 2.0beta2) on thing.stud.ies.auc.dk (RH6.2).
> Soeren> When I try to connect from hvil.stud.ies.auc.dk with X
> Soeren> -indirect thing I get a loginscreen instead of the hostchooser
> Soeren> I expected.
> 
> GDM doesn't implement choosing yet.  I have it running in a devel
> tree, but:
> 
>         Choosing is a horrid kludge which isn't part of the XDMCP
>         spec.
> 
>         Choosing breaks a lot of other stuff.  I had to redesign most
>         of the daemon to get it running.
> 
>         Choosing is extremely vulnerable to DoS attacks.  I have a few
>         ideas how to limit this, however.
> 
> So the answer is: Yes, I'll get it merged into the main tree
> eventually, but you probably don't want to turn it on unless you
> *really*, *really* need it.
> 
> -- 
> Martin K. Petersen	Principal Linux Consultant, Linuxcare, Inc.
> http://mkp.net/		XFS, Linux/PA-RISC, GNOME, SunSITE Denmark
> 
>