What is a Proxy?
Proxy is basically a purposeful computer which serves as an intermediary hub between the endpoint device, like a computer or laptop, and the server which is being used to request a service from the user. All the internet requests gets processed through proxy servers. By letting the user to connect via one of these servers, the host computer can send the user requests to proxy server which in turn processes the request and finally returns the required result to the user which he wanted. So, in this manner proxy is actually serving as an intermediate between the user machine and all the remaining computers over the internet. These servers are generally located at user’s own system, or between destination servers on the internet and user’s system.
Proxy server remains invisible to the user. All requests sent over internet and their returned responses to the user appears to be associated with addressed Internet server. A proxy can exist as a firewall server on the same machine or it can be configured on an entirely different server, which in turn can forward the requests via firewall.