Hi,
I have installed vncserver on SL6.3 and followed this guide 

http://vjetnamnet.com/how-to-setup-vnc-server-on-centos-6-3/


However when I try to connect from windows, I get 

"connection timed out" message.

I searched a lot to diagnose vnc server. However I didn't
find a step by step guide. What should I check in order to 

be sure that vnc server is working properly.

 
Regards,
Mahmood