Tuesday, January 24, 2012

Site to open blocked sites 2012

Site to open blocked sites 2012

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In computer networks, is a unit of service as a deputy or proxy server (which may be a one of a computer systems or application software) works as a link between requests from customers' computers that are looking for sources required from other service units. Can be referred to the unity of alternative service as a server proxy, or could simply be the word proxy. The machine, the client connects to a proxy server to get a service, whether a file or Web page, or access to a site or access to any source from any other server. Therefore, the proxy server and evaluates the application submitted in accordance with the rules of filtering their data. For example, you might filter the data by IP address. Me or, as sometimes called, protocol IP. If the verification of the application after going through the process of filtering, the demand to provide proxy through to contact the relevant service on behalf of the organ. The Unit proxy server - optional - switching of the device or the response of the server. In some cases, may provide the request without contacting the server identified; because they are "store" response and the server on demand. In this case, if he wants to get the device's on-demand the same later, they are providing directly without the need to connect to the specified service again. The reasons for using proxy servers:

    
Do not recognize the hardware behind the proxy and make it anonymous (for insurance) How-to. Linux.org.
    
Speed ​​up access to the resources needed (making use of property located on the storage and server proxy) - which are mostly used to store web pages provided by the web servers. Thomas, Keir (2006). Beginning Ubuntu Linux: From Novice to Professional. Apress. "A proxy server helps speed up Internet access by storing frequently accessed pages"
It should be noted that the units of the proxy server that passes requests and responses it without change them often called the Gateway (and mean gate pass) or sometimes called a Tunneling Proxy (a proxy that works through a process of embedding secure using the SSL protocol between the computer and service units). Furthermore, the module can be installed a proxy server on the local computer of the user or elsewhere in the multi-user computer and the target service units or the Internet. The server proxy or reverse (Reverse Proxy) thereby acting as a front in order to increase the use of the speed of order fulfillment and storage resources required (such as web pages).

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