Author: H.User1325 (12 Jul 14 3:19pm)
It would be pointless for the "visitor" to try to spoof their IP in the internet packet header. If the return IP (requesting IP) in their requesting packet is not their IP the initial handshaking protocol sequence will fail because their system will not receive the return handshake packet.
When you refer to "the visible one (IP)" are you confusing the http packet header with email headers which contains many elements that can be spoofed?
Post Edited (12 Jul 14 3:21pm)