SSH -Y problem

meme · 10-25-2005, 12:14 PM

Hello,

I have a question regarding SSH and SSH -Y

If I use this way to login:
SSH username@server

After accessing to server, I can not open emacs or matlab or any software in that machine. (For example, when I input emacs &, nothing pop out)

But, if I use this way to login:
SSH -Y username@server1

Emacs and matlab can be opened.

Is there any way to modify the setting or something else so that login by SSH without -Y can work properly as login by SSH -Y.

Thanks in advance

Zero-0-Effect · 10-25-2005, 12:48 PM

In the ~/.ssh/config (or /etc/ssh/ssh_config for global) change or add
ForwardX11Trusted Yes
You can also add other variables such as the server and username if you wish.
You can find more information on that in the ssh config (5) man page.

anomie · 10-25-2005, 12:52 PM

OP: Nope, not that I know of. You will have to explicitly tell it to use the -Y option.

One thing you could do is create an alias for yourself to make it easier.

Code:

alias sshy='ssh -Y'

If you want, append that line to your ~/.profile so that it's always in effect.

pomsailasuta · 10-25-2005, 01:09 PM

does ssh works if both both PC are behind firewalls?

I used 'ssh -Y -l login_name IP'
it works for me but I can not display any application from the other Linux.
I did do xhost + command.

Zero-0-Effect · 10-25-2005, 01:09 PM

Quote:

OP: Nope, not that I know of. You will have to explicitly tell it to use the -Y option.

Did you not read my post or the man page for ssh config ??

pomsailasuta · 10-25-2005, 01:27 PM

Sorry for being stupid, I am new at this. I will search for your posting ( if I can find it ).

thanks again.

anomie · 10-25-2005, 02:59 PM

Quote:

Did you not read my post or the man page for ssh config ??

Your post appeared as I was typing mine.

So ForwardX11Trusted assumes the -Y option? That's what the OP is going for. I read the man page entry you cited and its description is a little unclear to me.

If you've tested this and it works as advertised, that's good.

Zero-0-Effect · 10-25-2005, 03:29 PM

Quote:

If you've tested this and it works as advertised, that's good.

When I read the man page it sounded exactly like what that is supposed to do. Im wanting to see if this works myself really. At the moment I cant test it out but here shortly Ill be back at home and will do so.

Quote:

Sorry for being stupid, I am new at this. I will search for your posting ( if I can find it ).

That response wasnt for you, and the post I was referring to was the second post in this thread.

Quote:

Your post appeared as I was typing mine.

Guess the same thing happend to both of us now. He posted just before I posted.

spooon · 10-25-2005, 03:44 PM

Quote:

Originally posted by pomsailasuta
does ssh works if both both PC are behind firewalls?

I used 'ssh -Y -l login_name IP'
it works for me but I can not display any application from the other Linux.
I did do xhost + command.

It should work. You shouldn't do any "xhost" stuff. Is the SSH server set to allow X forwarding? (Make sure the "X11Forwarding yes" directive is set in /etc/ssh/sshd_config)

meme · 10-28-2005, 02:07 PM

Thanks for all your kind help.

I checked them:
/etc/ssh/ssh_config
ForwardX11Trusted is already set to be yes

And,
/etc/ssh/sshd_config
X11Forwarding is also set to be yes

But, it still can not work.

Any suggestions will be highly appreciated.
Thanks

anomie · 10-28-2005, 04:01 PM

You might consider using the alias approach I mentioned earlier in the thread. Just one idea.

meme · 10-28-2005, 04:21 PM

Thank you anomie.
I will use alias approach as you said.

pomsailasuta · 10-28-2005, 10:52 PM

My works just fine now. thanks for all your suggestions.

My problem is that the IP address that my router assigned to my PC is not known to the outside world except
in my house, so after I switched to my internet subscriber line, it works!!!!!!