How does a proxy server work?

The main task of a proxy is to redirect traffic. Goals: anonymity, increased connection speed, bypassing blocking or content filtering.

Олександр Л.
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Олександр Л.

30 March 2025

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118

30 March 2025

A proxy server is an intermediary between a user and the web resources they are trying to access. Its main task is to redirect traffic, which can have various purposes: anonymity, increasing connection speed, bypassing blockages, or filtering content.

The main principle of a proxy server

The principle of a proxy is quite simple. When a user enters a website address in a browser or sends a request through a certain program, this request is first sent to a proxy server, not directly to the website. The proxy processes this request, changing the IP address if necessary, adding or removing certain data, and then sends the request further to the target resource. After receiving a response from the server, the proxy processes it again and passes it on to the user. One of the main functions of a proxy is to change or hide the IP address. This allows the user to remain anonymous online, bypass geographic restrictions, or access blocked resources. For example, if a certain website is available only to users from a particular country, a proxy can provide the IP address of that country, which will allow you to bypass the restrictions. Another important feature of a proxy is caching. If many users of the same proxy server frequently visit a certain website, the server can store a copy of its data. In this case, when the user accesses this resource again, the proxy does not send a request to the original site, but provides the answer from its cached copy. This significantly speeds up page loading and reduces the load on the network. Besides, proxy servers are used for content filtering. This can be useful both in corporate networks and in educational institutions where it is necessary to restrict access to certain sites. A proxy can block or edit requests, preventing users from viewing unwanted web resources. Security is another important aspect of a proxy. Using such a server helps to protect devices from malicious attacks, as a proxy can analyze traffic and block potentially dangerous connections. This is especially important for companies that want to protect their corporate network from cyberattacks. Therefore, it is worth understanding how a proxy server works and why it can be really useful in various areas.


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Types of proxy servers

There are several types of proxy servers, each of which has its own characteristics.

  • An HTTP proxy is used to work with web resources. It can cache pages, block ads, and speed up content loading.
  • An HTTPS proxy works in a similar way, but supports data encryption, which increases the level of security when transferring confidential information.
  • OCKS proxies are more versatile because they can transmit any traffic, including video and audio streams, which makes them popular for working with torrents and other services.
  • Resident proxies use real IP addresses, which makes them less visible to website security systems. Due to this diversity and advantages, they are used both in everyday life and in business to optimize the network.

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