I'm running into an a problem with x11 forwarding over ssh
I'm trying to run an application (rasmol - molecule viewing program)
which when using the the default setup for x11 forwarding causes the
following error:
X Error of failed request: BadAccess (attempt to access private
resource denied)
Major opcode of failed request: 132 (MIT-SHM)
Minor opcode of failed request: 1 (X_ShmAttach)
Serial number of failed request: 230
Current serial number in output stream: 231
It used to be possible to overcome this by setting
X11UseLocalhost no
in /etc/ssh/sshd_config
This worked in CentOS 3 but does not in CentOS 4 (or Fedora 4 for
that matter), and I'm guessing it is a XFree86 vs. Xorg issue.
Now, when using
X11UseLocalhost no
no X applications work
ssh myserver
# echo $DISPLAY
myserver.fqdn:10.0
# xdpyinfo
xdpyinfo: unable to open display "myserver.fqdn:10.0".
I have X11 forwarding set up on the client side by default.
on the other hand if I don't use tunneling, but set DISPLAY=myclient:
0 and xhost +myserver on the client
then the application works.
I prefer to use tunneling if possible.
Thoughts about why X11UseLocalhost doesn't work?
Tony Schreiner
