![]() ![]() ![]() In this definition, the proxy servers are "forward proxies" that hide the details of the clients from the servers. ![]() In contrast, a "circuit-level" proxy supports every application (see SOCKS). "Application-level" proxies or "application-level gateways" are dedicated to specific content such as HTTP (Web) and FTP (file transfer). Although not specifically called proxies, Internet email (SMTP) and the Usenet new system (NNTP) are somewhat similar because messages are relayed from sender to recipient. See NAT and proxy cache.Īnonymous proxy servers let users surf the Web and keep their IP address private (see anonymous proxy). Proxy servers may also cache Web pages so that the next request for that page can be retrieved much faster. Proxies are often used in conjunction with network address translation (NAT), which hides the users' IP addresses on the internal network. The address on the outbound side is the one the Internet sees. The proxy server is a dual-homed host with two network IP addresses. Like a virtual private network (VPN), a proxy server hides the user's IP address when accessing the Internet. ![]() Likewise, responses come back to the proxy server and then to the user. All requests to the Internet go to the proxy server first, which evaluates the request and forwards it to the Internet. The word proxy means "to act on behalf of another," and a proxy server acts on behalf of the user. It helps prevent an attacker from invading a private network and is one of several tools used to build a firewall. PROXY WEBSITES FREEThis article is provided by FOLDOC - Free Online Dictionary of Computing ( ) proxy serverA proxy server is a computer system or router that functions as a relay between client and server. ![]()
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