X-Terminal over SSH Woes

[der.hans]

Am 23. Aug, 2006 schwätzte Mark Phillips so:

> I cannot figure out what is wrong. Everything I have read on the net and in
> O'Rreilly's SSH book say I am doing it right, but it doesn't work!
>
> Machine - monkey
> Debian stable
> /etc/ssh/ssh_config has
>   ForwardX11 yes
>   ForwardX11Trusted no

debian defaults to ForwardX11Trusted set to yes.

> Machine - stingray
> Debian stable
> kde desktop is running
> /etc/ssh/ssh_config has
>   ForwardX11 yes
>   ForwardX11Trusted no
>
> I can ssh from monkey to stingray (and vice versa)
>
> When I try ssh -X stingray from monkey, I get Error: Can't open display.
>
> In debug mode, I see the following:
> debug1: Authentication succeeded (keyboard-interactive).
> debug1: channel 0: new [client-session]
> debug1: Entering interactive session.
> debug1: Requesting X11 forwarding with authentication spoofing.
> Linux stingray 2.6.8-2-386 #1 Tue Aug 16 12:46:35 UTC 2005 i686 GNU/Linux
>
> mark at stingray:~$ echo $DISPLAY

stingray is the remote host in this situation, correct?

What do you have for DISPLAY on the localhost?

Let us see the following scenerio:

local:$ echo $DISPLAY
:0.0
local:$ ssh -X remote
you at remote's password:
.
.
remote:$ echo $DISPLAY
localhost:10.0

> mark at stingray:~$ xeyes
> Error: Can't open display:

Yup, not having DISPLAY set will do that to you :).

ciao,

der.hans

> mark at stingray:~$ exit
> debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
> logout
> debug1: channel 0: free: client-session, nchannels 1
> Connection to stingray closed.
> debug1: Transferred: stdin 0, stdout 0, stderr 32 bytes in 87.1 seconds
> debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 0.4
> debug1: Exit status 1
>
> FWIW, I can do "X -query stingray" from monkey and get the gdm login
> and my kde desktop from stingray to monkey.
>
> What am I doing wrong?
>
> Thanks!
>

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