can't display xwindow on remote machine using Debian 3.1
 

I am runnig Debian (Sarge) 3.1 on a LAN.
I want to open xwindow on a remote machine.

Two machines: Machine A and Machine B

I am logged in A.
1. I gave command: xhost + B
2. ssh to machine B.

3. Now while in machine B wrote command:
export DISPLAY=A:0.0
4. xterm

I see error message: xterm Xt error: Can't open display

I also made following change in /etc/ssh/sshd_config:
X11Forwarding yes
(Above change was made made for both the machines A and B). I also rebooted A & B after this change, but to no avail. (I also tried the same thing while on machine B.)

Your help is greatly appreciated.

Did you try to open the ssh connection using
(enable X11) or
(enable trusted X11 - remember to make B "trusted")

instead of plain "ssh"?

After your advice I tried it as:

xhost + remotehost
ssh -X machineB -l username
....export DISPLAY....

also as:

xhost + remotehost
ssh -Y machineB -l username
....export DISPLAY....

But both ways, I get the following error
xterm Xt error: Can't open display: machineA:0.0

Hello b0uncer,
I GOT THAT. NOW IT is working fine. Thanks for your help.
Today I tried ssh -X without messing with xhost or export DISPLAY..etc.
That is : I did NOT write : xhost +hostname
I did not write: export DISPLAY....
I just wrote:
ssh -X hostname
and once I got into that host, then I wrote xterm.
It is working great.
Previously I was mixing ssh -X and then given command ..DISPLAY.. and then xterm. That is not a proper way.
Proper way is just as I described above. I wrote a detailed reply so that it can help anyone who reads this thread.

Thank you b0uncer. I appreciate taking your time and giving the response.
Best regards.