I know how to specify a listening port of VNC server under Linux, but what puzzles me is I can not find a way to specify a VNC listening IP.
When started VNC server under CentOS 5.6, I found its process "Xvnc" is listening on
127.0.0.1:5901. Maybe this is why I always failed to get in when I use any XNC client. I do not know why it listened on "lo" network interface but not on "eth0".