SSH X11 forwarding issues
Philip H. Schlesinger
pschlesi@uci.edu
Thu Apr 6 17:33:00 GMT 2006
Hi Jack. See my other post at 9:19 am with the -vvv output.
Freezes: I type my password, hit enter, and I don't get any additional
output. -vvv says that things are being sent to /dev/null
- Phil
Jack Tanner wrote:
> -Y is really what you want. Aside from that, anything useful from -vv?
> What about the server logs? And /tmp/Xwin.log? And what do you mean by
> "freezes"?
>
> Philip H. Schlesinger wrote:
>> Hi Sterling.
>>
>> I checked the man page and -Y is just -X with less security:
>>
>> -X Enables X11 forwarding. This can also be specified on a
>> per-host basis in a configuration file. X11 forwarding should be
>> enabled with caution. Users with the ability to bypass file
>> permissions on the remote host (for the user's X authorization
>> database) can access the local X11 display through the forwarded
>> connection. An attacker may then be able to perform activities such
>> as keystroke monitoring.
>>
>> -Y Enables trusted X11 forwarding. Trusted X11 forwardings are
>> not subjected to the X11 SECURITY extension controls.
>>
>> Nevertheless, same problem - it freezes after I type in my password.
>>
>> Other ideas?
>>
>> - Phil
>>
>>
>>
>>
>> Sterling Baker wrote:
>>> I believe the use of '-X' has been depreciated. Try using '-Y' instead.
>>>
>>> Sterling
>>>
>>>
>>> -----Original Message-----
>>> From: cygwin-xfree-owner@cygwin.com
>>> [mailto:cygwin-xfree-owner@cygwin.com] On Behalf Of Philip H.
>>> Schlesinger
>>> Sent: Wednesday, April 05, 2006 10:07 PM
>>> To: cygwin-xfree@cygwin.com
>>> Subject: SSH X11 forwarding issues
>>>
>>> Hi all. I just upgraded my Cygwin to the latest version and found a
>>> rather interesting problem:
>>>
>>> I can do the following command in the bash window with no problem:
>>>
>>> ssh <username>@<server location>
>>>
>>> it prompts me for my password and then takes me in from there.
>>>
>>> --
>>>
>>> However, if I:
>>>
>>> startx
>>> ssh -X <username>@server location>
>>>
>>> It prompts me for my password and then hangs.
>>>
>>> --
>>>
>>> If I:
>>>
>>> startxwin.bat
>>> ssh -X <username>@server location>
>>>
>>> same problem: It prompts me for my password and then hangs.
>>>
>>> --
>>>
>>> The only way I've successfully made a connection with X forwarding is:
>>>
>>> startxwin.bat
>>> Execute putty for windows with X11 forwarding enabled
>>> Enter username and password
>>> And I'm off and running...
>>>
>>> Help?????
>>>
>>> - Phil
>
>
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