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

[Rob Richard]

An easy way around the ssh host key warnings is to use the 
StrictHostKeyChecking option (assuming you are using OpenSSH)

for example:

ssh -o StrictHostKeyChecking=no linux-lab.cs.stevens.edu

-Rob

Joe Letizia wrote:
> 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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