text: Other anonymizing proxy servers , known as elite or high anonymity proxies , only include the REMOTE_ADDR header with the IP address of the proxy server , making it appear that the proxy server is the client .
simplified: The client will not know that the proxy exists , but all of the information passes through the proxy server . They are sometimes called `` transparent '' proxy servers , because the user does not know a proxy server is between the client and remote server .