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How the proxy server works

Questions about how a proxy server works and what it really is are often asked by users of computer devices. To begin with, proxy-server translates from English as a proxy server. From the name it becomes clear what the basic principle of the proxy server is, and you just need to understand the specifics of this work, as well as find out why such an intermediary is needed and how it can be used.

Using a proxy server: reasons
Situations that require the use of a proxy server may be different, for example:

1) due to the lack of a modem, the computer device does not have direct Internet access;

2) for one reason or another, a user cannot use the Internet (for example, prohibits bosses);

3) when the webmaster, performing the appropriate manipulations in order to optimize the site and promote it, the optimizer’s IP address can get a ban from some other resource, after which it is no longer possible to work with this resource and view it.

In all these cases, a proxy server comes to the rescue, because it is thanks to it that the user gets access to the Web and the site of interest to him. All that needs to be done for Green Street on the Internet and to the desired resource is to put a proxy server on a computer connected to the Internet, that is, a small and uncomplicated program, of which a great many can be found on the Web.

Advantages and disadvantages of proxies
Installing a proxy has both advantages and disadvantages. Benefits:

1) the ability to surf the Internet;

2) it will be extremely difficult for hackers to get into the computer;

3) cost savings, since you do not need to purchase a modem;

4) there is no need to pay the provider for the Internet connection.

There is only one drawback for the proxy server. The computer on which the proxy server is connected operates in the same communication channel with a third-party computer device. And if this third-party device is not too smart, the pages on both computers will open even more slowly.

Types of Proxies
Before you understand the issue of the proxy server, you need to know that these programs can be of several types, namely: HTTP, HTTPS, FTP and SOKS. Each of the types works in its own way, in particular, the principle of operation of the HTTP proxy server is that when you receive a client request (that is, your address to which you need to go), the proxy goes to this address and remembers it. More precisely, the proxy remembers the response that comes from the DNS server that matches the human name of the website with the machine name, that is, its IP address. A further visit to the same page saves time.

In addition, if you configure HTTP appropriately, it can save pictures of certain pages and other information. Upon further visits to a specific page, the server looks at its content and, if it detects changes to the content, loads them, and the main content is loaded from the server’s cache.

The HTTPS server works on a similar basis, with one exception: the entire traffic flow coming from the client to the web resource is encrypted. If there is a spy program on the computer along with the proxy, it can catch only unreadable symbols.

SOCKS proxy server works on the same principle as HTTPS. The only difference is in the level of encryption: encryption at SOCKS is much stronger.

Anonymity and transparency
All proxies are anonymous and open, or transparent. The latter include those proxies that the client data does not change, passing them in the same form in which they were received. In other words, the IP address will not change, and therefore it can be used to determine who used the services of a particular station.

Anonymous servers, accordingly, hide thus changing information about the latter. This allows the client to visit all sorts of different resources anonymously, that is, incognito. In IP settings, only the address of the proxy server will be displayed. It is these proxies that webmasters and most users prefer to install.

But such convenience is one positive side of the coin. There is another, no less positive. Often they want to hide the computer in order to ensure the maximum level of protection for it. And the vast majority of proxy servers demonstrate an extremely powerful degree of protection against intrusions from outside, and for this reason the proxy server will not take on the lion’s share of the attack.

Be careful!
At the same time, it should be remembered that a proxy server whose use is beyond doubt, if present on a computer, still does not completely protect the device from viruses. Remember that by hiding your IP, you can easily catch a virus due to browser vulnerabilities when you download suspicious software. The first “symptom” of the fact that your computer is not “alone” is when you cannot delete any file when you uninstall such software. So be careful!

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