Setup of Xserver

Hi all. We are doing a large server migration. We need to allow access to one particular server, let's call it server A, for it to display sessions from other servers in X11.

We can access server A, and users from within server A can start xterm sessions in the graphical display as long as they do this:

export DISPLAY=:0.0

xterm &

xeyes &

all works fine.

Now, same users from the same server A, if they do

export DISPLAY=10.1.1.1:0.0

where 10.1.1.1 is IP of server A,

then all sessions fail indicating

canot open display: 10.1.1.1:0.0

obviously from other hosts, the message is the same.