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Proxy Server
A server that sits between a client application, such as a Web browser, and a real server. It intercepts all requests to the real server to see if it can fulfill the requests itself. If not, it forwards the request to the real server.
Proxy servers have two main purposes:
- Improve Performance: Proxy servers can dramatically improve performance for groups of users. This is because it saves the results of all requests for a certain amount of time. Consider the case where both user X and user Y access the World Wide Web through a proxy server. First user X requests a certain Web page, which we'll call Page 1. Sometime later, user Y requests the same page. Instead of forwarding the request to the Web server where Page 1 resides, which can be a time-consuming operation, the proxy server simply returns the Page 1 that it already fetched for user X. Since the proxy server is often on the same network as the user, this is a much faster operation. Real proxy servers support hundreds or thousands of users. The major online services such as America Online, MSN and Yahoo, for example, employ an array of proxy servers.
- Filter Requests: Proxy servers can also be used to filter requests. For example, a company might use a proxy server to prevent its employees from accessing a specific set of Web sites.
Proxy and security related articles:
Proxy Hijacking
A proxy refers to something that's used as an alternative to the real thing. In reference to servers, proxy servers are fast gaining popularity. A closed proxy is accessible by limited people and allows you to use someone else's computer to screen your identity and/or location.
Why use a web based proxy
In the world of web based proxies there are two popular types. A closed proxy can be used by limited people and involves using someone else's computer to hide your identity and/or location. An open proxy is a proxy server that can be used by any Internet user. The anonymous web based proxy allows users to make roundabout network connections to other network services incognito.
Proxy Servers
Proxy servers are a type of is a kind of barrier between the computer itself and the resources that are being accessed on the Internet. A proxy server gathers and hoards files that are frequently requested by multiple users in a database. This particular database is called a cache.
Unblocking Sites with a Proxy
Now that you have successfully installed a proxy server to your computer you might be noticing that you can no longer gain access to some of the websites and pages that you once could. Do not stress, this is an easy quick fix that almost anyone can do. There are several free downloadable programs that will walk you through the process of unblocking the websites that you want.