![]() 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. Depending on the protocol used, it may or may not encrypt the transmission. 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. How to Set Up Two-Factor AuthenticationĪ proxy server is a computer system or router that functions as a relay between client and server.How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.How to Block Robotexts and Spam Messages.
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