How to run an X application via X11 forwarding over ssh or putty with X deport enabled ?

Solution Verified - Updated -

Issue

  • How to run an X application via X11 forwarding over ssh or putty with Xming when using sudo ? The following error is received
    # sudo <X_application>
    X11 connection rejected because of wrong authentication.
    The application lost its connection to the display localhost:11.0;
    most likely the X server was shut down or you killed/destroyed the application.
  • How to run an X application via X11 forwarding over ssh or putty with X deport enabled ?
  • When putty is used with Xming to run the application, below error message will be displayed.
    [display@gss-xen~]$ sudo virt-manager
    Xlib: connection to "localhost:11.0" refused by server
    Xlib: PuTTY X11 proxy: MIT-MAGIC-COOKIE-1 data did not match
    Xlib: connection to "localhost:11.0" refused by server
    Xlib: PuTTY X11 proxy: MIT-MAGIC-COOKIE-1 data did not match
    Traceback (most recent call last):
    File "/usr/share/virt-manager/virt-manager.py", line 376, in ?
    _show_startup_error(str(run_e), "".join[traceback.format_exc())]
    File "/usr/share/virt-manager/virt-manager.py", line 52, in _show_startup_error
    import gtk
    File "/usr/lib64/python2.4/site-packages/gtk-2.0/gtk/_init_.py", line 76 in ?
    _init |)
    File "/usr/lib64/python2.4/site-packages/gtk-2.0/gtk/_init_.py", line 64 in ?
    _init |)
    _gtk.init_check()
    RuntimeError: could not open display
    [display@gss-xen~]$ 
  • Cannot connect to X server localhost:11.0

  • Unable to open virt-manager getting error. When logged in as root it is working fine, when doing as sudoer getting below error:

# virt-manager
MobaXterm X11 proxy: Authorisation not recognised
Unable to initialize GTK: could not open display

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

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