[cs615asa] HW1(Message: bochs: cannot connect to X server)

[Joe Letizia]

The DNS spoofing is not your fault. It is the linux lab admin's.

Try running xclock. that will tell you whether or not youve got 
xforawarding going.

If you're not using putty + xming, i suggest you do so...unless of 
course youre already using a *nix system.

Google it, its out there.

Shashwath Veerappa Devaru wrote:
> Professor now am facing another problem as seen below when i try to 
> ssh with X forwarding
>
> sveerapp at mechagodzilla:~$ ssh -X linux-lab.cs.stevens-tech.edu 
> <http://linux-lab.cs.stevens-tech.edu>
> @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
> @       WARNING: POSSIBLE DNS SPOOFING DETECTED!          @
> @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
> The RSA host key for linux-lab.cs.stevens-tech.edu 
> <http://linux-lab.cs.stevens-tech.edu> has changed,
> and the key for the according IP address 155.246.89.34
> is unknown. This could either mean that
> DNS SPOOFING is happening or the IP address for the host
> and its host key have changed at the same time.
> @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
> @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
> @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
> IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
> Someone could be eavesdropping on you right now (man-in-the-middle 
> attack)!
> It is also possible that the RSA host key has just been changed.
> The fingerprint for the RSA key sent by the remote host is
> 18:14:af:55:11:6e:af:3c:a2:b8:6d:cd:30:6e:85:3a.
> Please contact your system administrator.
> Add correct host key in /home/sveerapp/.ssh/known_hosts to get rid of 
> this message.
> Offending key in /home/sveerapp/.ssh/known_hosts:5
> RSA host key for linux-lab.cs.stevens-tech.edu 
> <http://linux-lab.cs.stevens-tech.edu> has changed and you have 
> requested strict checking.
> Host key verification failed.
>
>
> I tried on separate hosts but with no luck. Using -Y option also gives 
> the same message as above. No am not able to run xterm either, while i 
> try to run I get the following error
>
> sveerapp at neo:~$ xterm
> xterm Xt error: Can't open display:
> xterm:  DISPLAY is not set
>
> Kindly Help.
>
> Thank you,
> Shashwath
>
> On Wed, Feb 18, 2009 at 10:44 PM, Jan Schaumann 
> <jschauma at cs.stevens.edu <mailto:jschauma at cs.stevens.edu>> wrote:
>
>     Shashwath Veerappa Devaru <sveerapp at stevens.edu
>     <mailto:sveerapp at stevens.edu>> wrote:
>
>
>     > I did ssh to linux-lab.cs.stevens-tech.edu
>     <http://linux-lab.cs.stevens-tech.edu> with X forwarding enabled using
>     > the command "ssh -X linux-lab.cs.stevens-tech.edu
>     <http://linux-lab.cs.stevens-tech.edu> " .
>
>     That ought to work.  Is this only happening on a specific host or
>     on all
>     hosts that linux-lab.cs.stevens-tech.edu
>     <http://linux-lab.cs.stevens-tech.edu> maps do?
>
>     Can you run other applications, such as xterm?
>
>     Have you tried using '-Y' instead of '-X'?
>
>     -Jan
>
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