/etc/ssh/sshd_config

X11Forwarding yes
#X11DisplayOffset 10      <-  DISPLAY=localhost:10.0
#X11UseLocalhost yes

# grep X11 /etc/ssh/sshd_config

#/etc/init.d/sshd reload

# ssh -XC testuser@192.168.0.150

$ echo $DISPLAY
localhost:10.0

$ netstat -at

$ xauth list  

$ xclock &
$ xeyes &
$ xterm &

$ echo $DISPLAY
localhost:10.0

$ su - oracle

$ echo $DISPLAY            <- check $DISPLYA
$ export DISPLAY=localhost:10.0   <- change $DISPAY
$ echo $DISPLAY

$ xterm &

1. Connect server with Teraterm
2. Configure X Forwading
   

   [Setup] - [SSH Forwarding...]
   [TTSSH: Forwarding Setup] window
     X Forwarding
     ON "Display remote X applications on local X server"
   

3. Start Xming
4. xeyes and so on, for check x fowading

user01@mypc:~$ ssh -XC  user01@ladder-server

user01@ladder-server:~$ ssh -XC  user01@target-server

user01@target-server:~$ firefox &