Problem using xserver : Linux server / router-firewall / windows,cygwin, Xserver

[Tushar Manglik]

Hello,

I recently installed cygwin on my windows XP machine. I also installed the X 
server. I can use the X server to open applications like xclock from cygwin.

I would like to ssh from my Windows-cygwin environment to a remote Linux 
machine and use a program like xclock/emacs. I cannot use ssh -X or ssh -Y 
option. My windows machine sits behind a router that has a active firewall.

This is what I have done so far
1. On the remote Linux machine: export DISPLAY=Ip_Of_The_Router:0.0
2. For the router firewall: forward communication on port 6000 to port 6000
of my windows machine
3. On windows: turn of windows firewall
3. On windows-cygwin: xhost +
4. On windows-cygwin: (start the Xserver): /usr/X11R6/bin/startxwin.sh

After doing so, I do not see the xclok on my windows machine when I if I run 
the program on the Linux machine.

This there a way to find our where the problem is (Linux server / 
router-firewall / windows,cygwin, Xserver )

Thanks,
Tushar