Trying to access X11 my CentOS 6 x32 small Linode VPS through SSH Putty/Xming (enabled X11 forwarding on options).

My windows machine is not the problem since it works with others CentOS Servers.

X11Forwarding is enabled on /etc/ssh/sshd_config, still I can't get X11 forwarding.

I'm trying to get xclock to work, but I get Can't open display :0.0 error.

I've also tried with different $DISPLAY values like :0 or :10.0

I've tried MobaXterm, and I get this message when connecting:

X11 forwarding request failed on channel 0
  • 1
    What X server did you install on your Windows machine? Sep 7, 2012 at 16:14
  • Not sure what the CentOS equivalent is, but have you install the xbase-clients? This should include xauth, and a few other required libraries?
    – Zoredache
    Sep 7, 2012 at 16:35
  • I did yum install xclock, installed lot of dependencies.
    – jacktrades
    Sep 7, 2012 at 16:38

2 Answers 2


Here (Red Hat Login required) is a Tech Brief article from a fellow Red Hat consultant which discusses the minimum packages needed for X-Windows to work for SSH connections.

The key points are:

1) Install the following:
2) Enable the following in the sshd_config file
X11Forwarding yes
3) Use an appropriate X-Server on your desktop
  • You save me days!!!
    – zzy
    Aug 28, 2015 at 4:59

Installed this package: xorg-x11-xauth

Got solution from here.

Thanks for your help!

  • 6
    The bug report was helpfull ! The solution for me was to change the sshd_config to read AddressFamily inet as I had deactivated ipv6 via sysctl...
    – Julien
    Nov 1, 2013 at 10:43

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