not sure what google you are using but the answer is there.
Spoof:
In computer networking, IP address spoofing or IP spoofing is the creation of Internet Protocol (IP) packets with a forged source IP address, with the purpose of concealing the identity of the sender or impersonating another computing system.
Remote proxy:
A remote proxy server is usually computer hardware that acts as a go-between for client computer requests on a typical networked server. It can be located anywhere, and can also be a software program instead of an actual server. Its purpose is to perform a gateway function on network requests on a server, for security, filtering, and performance reasons.
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