I have a server (192.16.10.11) behind firewall and it was statically NATed with a routable IP address xxx.xxx.190.143. Right outside of the firewall, I have a PC with public IP address xxx.xxx.190, for the testing purpose. I am trying to ping xxx.xxx.190.143 from the same LAN segment and failed. Tried to ping xxx.xxx.190.143 from Melbourne and had no problem at all; i can even ssh into (through the firewall) that box from melbourne, but i just can't ping the public IP address xxx.xxx.190.143 from the same xxx.xxx.190.0 segment (right outside of the firewall). Strange