[ubuntu-us-mn] XDMCP configuration

jay curry rusty0101 at gmail.com
Tue Aug 4 04:09:35 BST 2009


If you want to forward gui applicaitons back to yourself over ssh, remember
to add the -X command to the ssh call. i.e. ssh -X userid at servername

In the gdm login window configuration panel, make sure that you are allowing
TCP connections to the Xserver if you are going to use XDMCP. I beleive it
is set to deny by default. That setting is on the Security tab.

As to the screen shots, Alt-PrtScrn is not really disabled, it's just not
doing the same thing as you might expect from windows. It's actually
activating the SysReq option, which tied with X, B, and a few other keys can
do a number of things, including telling the kernel to reboot a system that
otherwise is completely non-responsive.

-Rusty

On Mon, Aug 3, 2009 at 9:22 PM, <ubuntu-us-mn-request at lists.ubuntu.com>wrote:

> Send ubuntu-us-mn mailing list submissions to
>        ubuntu-us-mn at lists.ubuntu.com
>
> To subscribe or unsubscribe via the World Wide Web, visit
>        https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-mn
> or, via email, send a message with subject or body 'help' to
>        ubuntu-us-mn-request at lists.ubuntu.com
>
> You can reach the person managing the list at
>        ubuntu-us-mn-owner at lists.ubuntu.com
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of ubuntu-us-mn digest..."
>
>
> Today's Topics:
>
>   1. Re:  ubuntu-us-mn Digest, Vol 24, Issue 1 (Matthew Young)
>   2. Re:  ubuntu-us-mn Digest, Vol 24, Issue 1 (Daniel Bicknell)
>   3. Re:  XDMCP configuration (glenn opdycke-hansen)
>   4. Re:  XDMCP configuration (Eric Honaker)
>   5. Re:  XDMCP configuration (Daniel Bicknell)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 02 Aug 2009 17:35:44 -0500
> From: Matthew Young <rs.matthewcom.info at gmail.com>
> Subject: Re: [ubuntu-us-mn] ubuntu-us-mn Digest, Vol 24, Issue 1
> To: ubuntu-us-mn at lists.ubuntu.com
> Message-ID: <4A7614C0.9070106 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>  I was wondering, is it possible to take a screen shot of a browser
> game with Ubuntu 9.04?
> The game that I am talking about is ikariam. (www.ikariam.com)
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 2 Aug 2009 17:49:41 -0500
> From: "Daniel Bicknell" <danielbicknell63 at gmail.com>
> Subject: Re: [ubuntu-us-mn] ubuntu-us-mn Digest, Vol 24, Issue 1
> To: "'Matthew Young'" <rs.matthewcom.info at gmail.com>,
>        <ubuntu-us-mn at lists.ubuntu.com>
> Message-ID: <000b01ca13c3$870c2130$95246390$@com>
> Content-Type: text/plain;       charset="us-ascii"
>
> Hi Mathew,
>
> The 'Print Screen' button will do a full screen capture (at least in
> Gnome).
> I was a little surprised to find out that you can't do alt-print screens to
> capture just the active window like you can in Windows.  Also, the Gimp can
> do various screen captures as well.
>
> Hope this helps,
> Dan
>
>
> |-----Original Message-----
> |From: ubuntu-us-mn-bounces at lists.ubuntu.com [mailto:ubuntu-us-mn-
> |bounces at lists.ubuntu.com] On Behalf Of Matthew Young
> |Sent: Sunday, August 02, 2009 5:36 PM
> |To: ubuntu-us-mn at lists.ubuntu.com
> |Subject: Re: [ubuntu-us-mn] ubuntu-us-mn Digest, Vol 24, Issue 1
> |
> |  I was wondering, is it possible to take a screen shot of a browser
> |game with Ubuntu 9.04?
> |The game that I am talking about is ikariam. (www.ikariam.com)
> |
> |--
> |ubuntu-us-mn mailing list
> |ubuntu-us-mn at lists.ubuntu.com
> |Modify settings or unsubscribe at:
> |https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-mn
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sun, 2 Aug 2009 20:32:27 -0500
> From: glenn opdycke-hansen <glennoph at gmail.com>
> Subject: Re: [ubuntu-us-mn] XDMCP configuration
> To: Daniel Bicknell <danielbicknell63 at gmail.com>
> Cc: ubuntu-us-mn at lists.ubuntu.com
> Message-ID:
>        <c523edf80908021832s37647296hc47487fe45048b40 at mail.gmail.com>
> Content-Type: text/plain; charset="windows-1252"
>
> I see that XDMCP is not secure.  I was looking for a ssh base solution.
> Perhaps this will work:  VNC.
> The target system needs to be configured to accept remote control.  This
> can
> be done via System|Preferences|Remote Desktop Preferences.  The default is
> not to allow remote access.  On Sharing section, allow others to view
> and/or
> control the desktop.  On Security there are some options that apply.  For
> example, confirmation could be set on, but that would not be appropriate if
> the target system was unattended. Or a password can be required to access
> the system remotely.
> When the Remote Desktop Preferences is set, the system can be accessed via
> Applications|Internet|Remote Desktop Viewer.
>
> I was able to connect between my laptop and server, but there were issues
> seeing the refreshed screen.  I am not sure if it was that one machine was
> run gnome and the other was running kde.  There appears to be remote
> control.  But the results of the remote requests are not seen by the remote
> machine.  Perhaps this due to the router settings.  Anyway, good luck with
> this.
>
> Regards,
> Glenn
>
> On Sun, Aug 2, 2009 at 15:27, Daniel Bicknell <danielbicknell63 at gmail.com
> >wrote:
>
> >  I?m wondering if anyone uses XDMCP successfully with Ubuntu 9.04?  I
> > would like to be able to remotely log into my server via my laptop at
> home
> > through a gnome session.  I had this functioning in the past (back when I
> > was on 8.04) but at some time I stopped being able to use this access ?
> or
> > rather, when I try to remotely log in, the server isn?t found.
> >
> >
> >
> > To enable, I?ve gone into System->Administration->Login and enabled
> remote
> > login.  This was all I needed to do before and all of the documentation
> I?ve
> > found on searches only discusses this screen.  I have no problems
> accessing
> > Samba or connecting with SSH.  Both laptop and server are running the
> same
> > version of Ubuntu (9.04).
> >
> >
> >
> > Does anyone know what else I might look at?
> >
> >
> >
> > Thanks,
> >
> > Dan
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > --
> > ubuntu-us-mn mailing list
> > ubuntu-us-mn at lists.ubuntu.com
> > Modify settings or unsubscribe at:
> > https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-mn
> >
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> https://lists.ubuntu.com/archives/ubuntu-us-mn/attachments/20090802/61e42e28/attachment-0001.htm
>
> ------------------------------
>
> Message: 4
> Date: Sun, 2 Aug 2009 22:27:20 -0500
> From: Eric Honaker <songwindapogee at dragonseptarts.com>
> Subject: Re: [ubuntu-us-mn] XDMCP configuration
> To: Ubuntu Minnesota Mailing List <ubuntu-us-mn at lists.ubuntu.com>
> Message-ID:
>        <4b0998280908022027h5d689833q9488c85f599a40de at mail.gmail.com>
> Content-Type: text/plain; charset="windows-1252"
>
> Is there a particular reason that you want remote desktop as opposed to
> tunneling X apps through an ssh session?
>
> Eric Honaker
> Dragonsept Arts & Publishing <http://www.dragonseptarts.com/>
> "Words are, of course, the most powerful drug used by mankind." - Rudyard
> Kipling
>
>
>
> On Sun, Aug 2, 2009 at 8:32 PM, glenn opdycke-hansen <glennoph at gmail.com
> >wrote:
>
> > I see that XDMCP is not secure.  I was looking for a ssh base solution.
> > Perhaps this will work:  VNC.
> > The target system needs to be configured to accept remote control.  This
> > can be done via System|Preferences|Remote Desktop Preferences.  The
> default
> > is not to allow remote access.  On Sharing section, allow others to view
> > and/or control the desktop.  On Security there are some options that
> apply.
> > For example, confirmation could be set on, but that would not be
> appropriate
> > if the target system was unattended. Or a password can be required to
> access
> > the system remotely.
> > When the Remote Desktop Preferences is set, the system can be accessed
> via
> > Applications|Internet|Remote Desktop Viewer.
> >
> > I was able to connect between my laptop and server, but there were issues
> > seeing the refreshed screen.  I am not sure if it was that one machine
> was
> > run gnome and the other was running kde.  There appears to be remote
> > control.  But the results of the remote requests are not seen by the
> remote
> > machine.  Perhaps this due to the router settings.  Anyway, good luck
> with
> > this.
> >
> > Regards,
> > Glenn
> >
> > On Sun, Aug 2, 2009 at 15:27, Daniel Bicknell <
> danielbicknell63 at gmail.com>wrote:
> >
> >>  I?m wondering if anyone uses XDMCP successfully with Ubuntu 9.04?  I
> >> would like to be able to remotely log into my server via my laptop at
> home
> >> through a gnome session.  I had this functioning in the past (back when
> I
> >> was on 8.04) but at some time I stopped being able to use this access ?
> or
> >> rather, when I try to remotely log in, the server isn?t found.
> >>
> >>
> >>
> >> To enable, I?ve gone into System->Administration->Login and enabled
> remote
> >> login.  This was all I needed to do before and all of the documentation
> I?ve
> >> found on searches only discusses this screen.  I have no problems
> accessing
> >> Samba or connecting with SSH.  Both laptop and server are running the
> same
> >> version of Ubuntu (9.04).
> >>
> >>
> >>
> >> Does anyone know what else I might look at?
> >>
> >>
> >>
> >> Thanks,
> >>
> >> Dan
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> ubuntu-us-mn mailing list
> >> ubuntu-us-mn at lists.ubuntu.com
> >> Modify settings or unsubscribe at:
> >> https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-mn
> >>
> >>
> >
> > --
> > ubuntu-us-mn mailing list
> > ubuntu-us-mn at lists.ubuntu.com
> > Modify settings or unsubscribe at:
> > https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-mn
> >
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> https://lists.ubuntu.com/archives/ubuntu-us-mn/attachments/20090802/1d99ad80/attachment-0001.htm
>
> ------------------------------
>
> Message: 5
> Date: Mon, 3 Aug 2009 21:22:45 -0500
> From: "Daniel Bicknell" <danielbicknell63 at gmail.com>
> Subject: Re: [ubuntu-us-mn] XDMCP configuration
> To: "'Eric Honaker'" <songwindapogee at dragonseptarts.com>,       "'Ubuntu
>        Minnesota Mailing List'" <ubuntu-us-mn at lists.ubuntu.com>
> Message-ID: <000901ca14aa$74c4c990$5e4e5cb0$@com>
> Content-Type: text/plain; charset="us-ascii"
>
> I guess the answer is that I didn't know that I could.  I've tried googling
> and I come up with adding the following to my sshd config:
>
>
>
> X11Forwarding yes
>
>
>
> But, every time I try anything graphical I get a "Cannot open display" or
> "no display specified" error, so I seem to be missing a step or two?
>
>
>
> Thanks,
>
> Dan
>
>
>
>
>
> From: ubuntu-us-mn-bounces at lists.ubuntu.com
> [mailto:ubuntu-us-mn-bounces at lists.ubuntu.com] On Behalf Of Eric Honaker
> Sent: Sunday, August 02, 2009 10:27 PM
> To: Ubuntu Minnesota Mailing List
> Subject: Re: [ubuntu-us-mn] XDMCP configuration
>
>
>
> Is there a particular reason that you want remote desktop as opposed to
> tunneling X apps through an ssh session?
>
>  <http://www.dragonseptarts.com/favicon.ico> Eric Honaker
> Dragonsept Arts  <http://www.dragonseptarts.com/> & Publishing
> "Words are, of course, the most powerful drug used by mankind." - Rudyard
> Kipling
>
>
>
> On Sun, Aug 2, 2009 at 8:32 PM, glenn opdycke-hansen <glennoph at gmail.com>
> wrote:
>
> I see that XDMCP is not secure.  I was looking for a ssh base solution.
> Perhaps this will work:  VNC.
> The target system needs to be configured to accept remote control.  This
> can
> be done via System|Preferences|Remote Desktop Preferences.  The default is
> not to allow remote access.  On Sharing section, allow others to view
> and/or
> control the desktop.  On Security there are some options that apply.  For
> example, confirmation could be set on, but that would not be appropriate if
> the target system was unattended. Or a password can be required to access
> the system remotely.
> When the Remote Desktop Preferences is set, the system can be accessed via
> Applications|Internet|Remote Desktop Viewer.
>
> I was able to connect between my laptop and server, but there were issues
> seeing the refreshed screen.  I am not sure if it was that one machine was
> run gnome and the other was running kde.  There appears to be remote
> control.  But the results of the remote requests are not seen by the remote
> machine.  Perhaps this due to the router settings.  Anyway, good luck with
> this.
>
> Regards,
> Glenn
>
> On Sun, Aug 2, 2009 at 15:27, Daniel Bicknell <danielbicknell63 at gmail.com>
> wrote:
>
> I'm wondering if anyone uses XDMCP successfully with Ubuntu 9.04?  I would
> like to be able to remotely log into my server via my laptop at home
> through
> a gnome session.  I had this functioning in the past (back when I was on
> 8.04) but at some time I stopped being able to use this access - or rather,
> when I try to remotely log in, the server isn't found.
>
>
>
> To enable, I've gone into System->Administration->Login and enabled remote
> login.  This was all I needed to do before and all of the documentation
> I've
> found on searches only discusses this screen.  I have no problems accessing
> Samba or connecting with SSH.  Both laptop and server are running the same
> version of Ubuntu (9.04).
>
>
>
> Does anyone know what else I might look at?
>
>
>
> Thanks,
>
> Dan
>
>
>
>
>
>
>
>
>
>
>
>
>
> --
> ubuntu-us-mn mailing list
> ubuntu-us-mn at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-mn
>
>
>
> --
> ubuntu-us-mn mailing list
> ubuntu-us-mn at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-mn
>
>
>
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> https://lists.ubuntu.com/archives/ubuntu-us-mn/attachments/20090803/029e5ba9/attachment.htm
>
> ------------------------------
>
> --
> ubuntu-us-mn mailing list
> ubuntu-us-mn at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-mn
>
>
> End of ubuntu-us-mn Digest, Vol 24, Issue 2
> *******************************************
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://lists.ubuntu.com/archives/ubuntu-us-mn/attachments/20090804/6593708c/attachment.htm 


More information about the ubuntu-us-mn mailing list