[Cialug] X to X

[Tim Wilson]

Jeffrey,

I understand the risks behind xhost +, but I'm on my home network
behind a firewall.  I feel pretty safe doing xhost + here.  If it gets
it working, I'll do it, as long as it doesn't expose me to the outside
world.

On 2/28/07, Jeffrey C. Ollie <jeff at ocjtech.us> wrote:
> On Wed, 2007-02-28 at 23:14 -0600, Tim Wilson wrote:
> > On my laptop, I'm running Suse Linux with KDE as my desktop.  I want
> > to open up X-Windows to another Linux box.  On Windows, I can run
> > XOrg's X server with an XDMCP query, and it will come up.  Is there a
> > way for me to do that on Linux?
> >
> > I've tried running vncviewer, but it isn't responsive enough (the
> > cursor doesn't always change on a window frame).
> >
> > I've even tried launching individual apps back, but I keep getting an
> > error that it can't open the display, and that was after doing 'xhost
> > +' and making sure I don't have a firewall running.
>
> Never, never, never, type "xhost +".  It's a MAJOR security hole.
> Someone could capture all of your keystrokes without you ever knowing.
>
> In either /etc/ssh/ssh_config or ~/.ssh/config add some lines (or
> uncomment) like this:
>
> Host *
>         ForwardX11 yes
>         ForwardX11Trusted yes
>
> Then, when you SSH from one system to another SSH will take care of
> setting up xauth and the DISPLAY environment variable to securely
> forward the X protocol across the SSH connection.  This will work pretty
> well over a fast LAN connection, but will be pretty slow across the
> Internet.
>
> Jeff
>
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-- 
Tim