how can I disable the warning about X11 forwarding

how can I disable the warning about X11 forwarding

[Peter]

I want to allow some users to run an interactive program on my w2012 
server via ssh.
The program is a console app so I do not need X forwarding.
Users are connecting via putty without an X server.
Alas they always get nagged with the
"WARNING: No xauth data; using fake authentication data for X11 forwarding."
Is there a way to get rid of this message?



--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

Re: how can I disable the warning about X11 forwarding

[Andrey Repin]

Greetings, Peter!

> I want to allow some users to run an interactive program on my w2012 
> server via ssh.
> The program is a console app so I do not need X forwarding.
> Users are connecting via putty without an X server.
> Alas they always get nagged with the
> "WARNING: No xauth data; using fake authentication data for X11 forwarding."
> Is there a way to get rid of this message?

Tell them to not request X11 forwarding, and they won't be nagged by it.


-- 
With best regards,
Andrey Repin
Thursday, October 8, 2015 21:55:52

Sorry for my terrible english...


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

Re: how can I disable the warning about X11 forwarding

[Peter]

On 08.10.2015 20:56, Andrey Repin wrote:
> Greetings, Peter!
>
>> I want to allow some users to run an interactive program on my w2012
>> server via ssh.
>> The program is a console app so I do not need X forwarding.
>> Users are connecting via putty without an X server.
>> Alas they always get nagged with the
>> "WARNING: No xauth data; using fake authentication data for X11 forwarding."
>> Is there a way to get rid of this message?
> Tell them to not request X11 forwarding, and they won't be nagged by it.
>
>
I don't understand this answer.
The command is just    ssh  user@host    when I get the warning.
If the command was  ssh -X user@host  or ssh -Y user@host  it would be 
clear to me.
So maybe there is some default in sshd_config that should be changed?


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

Re: how can I disable the warning about X11 forwarding

[Ken Jackson]

On 10/08/2015 12:47 PM, Peter wrote:
> I want to allow some users to run an interactive program on my w2012
> server via ssh.
> The program is a console app so I do not need X forwarding.
> Users are connecting via putty without an X server.
> Alas they always get nagged with the
> "WARNING: No xauth data; using fake authentication data for X11
> forwarding."
> Is there a way to get rid of this message?

I have this in my ~/.bashrc file to add xauth data:

if [ -n "$DISPLAY" -a -z "$(xauth list ":${DISPLAY#*:}" 2>/dev/null)" ]
then
     xauth add "$DISPLAY" . "$(date | md5sum | cut -b1-32)"
fi


Alternately, try putting this in /etc/ssh_config:

   ForwardX11 no

-Ken

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple