Re: remote xterm's can't open display after upgrade

["J. Offerman" <jofferman@gmail.com>]

Instead of bothering with the nolisten option and running

$ ssh centos6

Just do this:

$ ssh -Y centos6

without touching the xserver option. That's what Jon meant. I also
stumbled upon this awhile back and pulled my hair(from whereever I
still got them).


On Thu, Dec 11, 2014 at 11:14 AM, Jon TURNEY
<jon.turney@dronecode.org.uk> wrote:
> On 11/12/2014 18:31, Don Webster wrote:
>>
>> I needed to upgrade gs to gs 9.15, so I ran setup yesterday. It
>> wanted to update a whole bunch of stuff, including X. OK, fine, I
>> hadn't updated cygwin in quite a while, and I had other stuff to do.
>>
>> After the upgrade, I can't display remote xterms. OK, my old X
>> shortcut didn't work, but I found "XWin Server" and pinned it to my
>> task bar. I launch that and I have the X server running, and a local
>> xterm pops up. I ssh into my linux server, and run my xterm, and get
>> "can't open display". I did these steps.
>>
>> - turned off my Windows Firewall (I am on a safe, local network). -
>> launched XWin Server.
>>
>> In the xterm that popped up:
>> dcw@dcwdt02 ~
>> $ xhost +
>> access control disabled, clients can connect from any host
>>
>> dcw@dcwdt02 ~
>> $ ssh centos6
>> Last login: Wed Dec 10 16:31:16 2014 from dcwdt02
>> centos6% setenv DISPLAY 10.11.22.33:0.0    # I use tcsh
>> centos6% xterm
>> xterm Xt error: Can't open display: 10.11.22.33:0.0
>> centos6%
>>
>> Is there something obvious?
>
>
> https://cygwin.com/ml/cygwin-xfree/2014-11/msg00029.html
>
> The relevant part is "startx and startxwin now pass '-nolisten tcp' to the
> server by default, which increases security in the X server by not opening a
> port to TCP connections. The '-listen' flag can be passed as a server
> argument to override this."
>
> Your choices are to add the '-listen' flag to the startxwin invocation, or
> (better) to use 'ssh -Y' and not explicitly set DISPLAY (See
> http://x.cygwin.com/docs/ug/using-remote-apps.html#using-remote-apps-ssh)
>
> --
> Jon TURNEY
> Volunteer Cygwin/X X Server maintainer
>
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