Date: Wed, 9 Jun 1999 09:51:48 +0200 From: Gunnar Flygt <gunnar@pluto.sr.se> To: hqy2446 <hqy2446@is2.nyu.edu> Cc: FreeBSD Questions <freebsd-questions@FreeBSD.org> Subject: Re: newbie question: ssh Message-ID: <19990609095148.B52109@sr.se> In-Reply-To: <Pine.OSF.3.95.990609025840.29957A-100000@is2.nyu.edu>; from hqy2446 on Wed, Jun 09, 1999 at 03:12:25AM -0400 References: <3.0.6.32.19990609015904.007faa30@is2.nyu.edu> <Pine.OSF.3.95.990609025840.29957A-100000@is2.nyu.edu>
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On Wed, Jun 09, 1999 at 03:12:25AM -0400, hqy2446 wrote:
> On Wed, 9 Jun 1999, Eivind Eklund wrote:
>
> > Date: Wed, 09 Jun 1999 01:59:04 -0400
> > From: Eivind Eklund <eivind@FreeBSD.ORG>
> > To: hqy2446@nyu.edu
> > Subject: Re: newbie question: ssh
> >
> > On Tue, Jun 08, 1999 at 03:07:49AM -0400, hqy2446 wrote:
> > > I have a newbie question regarding X connection forward by ssh.
> > >
> > > After I installed ssh-1.2.27 and ssh-2.0.13, I was unable to use 'X
> > > connection forwarding' at certain servers. Now I tried this command:
> > >
> > > $ ssh -l [username] [remote host] xterm -display [my ip address]:0.0
> > >
> > > xterm of the remote host was opened and I could run X clients on the host.
> > >
> > > I want to make sure that this connection is secured or not by experts or
> > > experienced users of ssh.
The you have to have sshd running on the host also!
> >
> > Not secured.
> >
> > > And one more question: What is the difference between above way of
> > > connection and just a connection to a remote host by ssh(just like a
> > > telnet) and run X clinets at the remote host shell?
> >
> > ssh will normally set up an emulated display at localhost:10.0 (or
> > 11.0, 12.0, etc - depends on how many other ssh users you have.) This
> > is securely forwarded, and is what you'll normally use. Your setup
> > makes the program use an insecure connection over the normal net
> > instead.
> >
> > Eivind.
> >
> >
>
> Thanks for your reply. Now I have a question. How can I make a secure
> connection to a remote host using by ssh? My FreeBSD box is stand-alone,
> I am the only user. I re-complie ssh-1.2.27 and ssh-2.0.13 with X
> connection forward option (it was default option, though). I still can't
> make X connection forward to a certain remote host, not all of them.
>
> What I did is
>
> $ xhost +[remote host]
>
> and then
>
> $ ssh -l [my user name] [remote host]
>
> or,
>
> $ DISPLAY=[my ip address]:0.0; export DISPLAY
> $ ssh -l [my user name] [remote host]
>
> Both of above, usually shell connection is fine, but X connection. When I
> tried to open a X client, I got this error message:
>
> 'Error: Can't open display: :0'
>
> The following is 'ssh -v' message:
>
> $ ssh -v -l [user name] [remote host]
> debug: hostname is 'foo.bar'.
> debug: Unable to open /home/foo/.ssh2/ssh2_config
> debug: connecting to foo.bar...
> debug: entering event loop
> debug: ssh_client_wrap: creating transport protocol
> debug: ssh_client_wrap: creating userauth protocol
> debug: Ssh2Transport/trcommon.c:592/ssh_tr_input_version: Remote version:
> SSH-1.99-2.0.12 (non-commercial)
> debug: Remote version: SSH-1.99-2.0.12 (non-commercial)
> debug: Host key found from the database.
> debug: Ssh2Common/sshcommon.c:155/ssh_common_special: special packet
> received from connection protocol: 3
> debug: Ssh2Common/sshcommon.c:155/ssh_common_special: special packet
> received from connection protocol: 4
> debug: Unable to open /home/foo/.ssh2/identification
> password:
> debug: Ssh2Common/sshcommon.c:155/ssh_common_special: special packet
> received from connection protocol: 6
> debug: Ssh2/ssh2.c:304/client_authenticated: client_authenticated
> debug: Ssh2Common/sshcommon.c:466/ssh_common_new_channel: num_channels now
> 1
> Last login: Wed Jun 9 01:45:13 1999
> %
>
>
> Any help would be greatly appreciately. Thanks again.
>
>
> -Paul
>
>
>
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--
__o
regards, Gunnar ---_ \<,_
email: flygt@sr.se ---- (_)/ (_)
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