{"id":34,"date":"2020-10-04T18:28:19","date_gmt":"2020-10-04T16:28:19","guid":{"rendered":"http:\/\/blog.espol.edu.ec\/knowledge\/?p=34"},"modified":"2020-10-04T18:28:19","modified_gmt":"2020-10-04T16:28:19","slug":"proxy-server","status":"publish","type":"post","link":"https:\/\/blog.espol.edu.ec\/knowledge\/2020\/10\/04\/proxy-server\/","title":{"rendered":"Proxy Server"},"content":{"rendered":"

A proxy server is a computer that can be connected as an interface between two computers or networks. It assumes a proxy function, receiving requests and transmitting them with its own IP address to another network. Proxy servers can be used on the Internet to hide the IP address.<\/span><\/p>\n

Definition<\/span><\/h2>\n

The basic meaning of the word ''proxy'' is \"the agency, function, or office of someone acting as a substitute for another\" (Merriam Webster's English dictionary). So the main purpose of a proxy is to act as a substitute.<\/span><\/p>\n

Internet or network solution<\/span><\/h2>\n

Proxy servers are used for both the Internet and proprietary networks. In principle, anyone can set up their own proxy server.<\/span><\/p>\n

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Network Proxy<\/span><\/h3>\n

A proxy server can also be used as part of a network, which is known as a network proxy. Two communication partners can exchange files or requests without transmitting the actual network address. A connection can also be established when both network addresses are not compatible.<\/span><\/p>\n

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Dedicated proxy<\/span><\/h3>\n

A dedicated proxy not only connects two communication partners, but also has a direct effect on the form of communication. You can manipulate, filter or cache the data packets sent to you. Caching is widely applied, especially on the Internet. In this way, the requested files are available more quickly to the Internet user. For data transmission, the dedicated proxy can read and apply various protocols such as http or ftp.<\/span><\/p>\n

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Circuit-level proxy<\/span><\/h3>\n

A circuit level proxy is typically installed on a firewall. It works independently of the network protocol as a filter for traffic from specific addresses or ports. Thus, the generic proxy, as it is also called, can request authentication for the use of a website.<\/span><\/p>\n

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Functions<\/span><\/h2>\n

Proxy servers have multiple functions. The most common ones are briefly explained below.<\/span><\/p>\n

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