Articles

What is a Proxy Server?

25 Dec 2017Admin

 If you are Internet user or if you work remotely, probably you have already used proxy for many times but did not know about it. Now we will tell what a proxy server is, how it works and how to use it more effectively.

 At the beginning, proxy servers were used to work on the Internet without personal IP-address. Now its functionality is widen and better optimized.  In short, the proxy server is a mediator between a user and remote computer to what he is connected. The proxy can be set on local user’s computer or anywhere on the Internet. The main task of proxy is to intercept clients’ requests and redirect them to destination servers or respond from proxy’s cache. At the beginning, it looks like a waste, but actually proxy has a lot of benefits.

 

1
  Who and why use Proxy Server

 Actually, proxy servers might be used anywhere and by anyone if it comes to the next several purposes:

    • • Improve performance. Proxy server can substantially improve performance for users because it saves the results of ones’ requests for a certain amount of time. Content, which was saved once, will be accessible for others. Improvement of performance is possible because of proxy’s cache, where information for a current user is loaded from the content.

    • • Connecting. When a user connects to website or download files through the proxy, his IP can be replaced by proxy’s IP. This user’s activity will be hidden, but not protected or safe.

  • • Filtering requests. This proxy’s function is profitable for organizations, where the stuff isn’t allowed to use the Internet on workplace for personal needs and because of security (social media, video streamers, news and other recourses) or reducing of traffic.
  • • Bypass restrictions. This is a reversed function of the proxy servers with reference to previous one. It allows bypassing employers or geo-based restrictions in order to use blocked resources or have the access to the limited ones.

 

2
  Types of Proxy

 To solve some tasks user needs to use different proxy servers. Thus, most of the users know, that proxy-servers are separated on transparence, anonymous and of high anonymity; their functionality is determined by other signs. There are several main types of proxy, which are worthy to be described in detail.
 HTTP-proxy. It is the most widespread type of proxy. It is used to provide correct functionality of browsers and other programs, which are using the TCP-protocol. Its main functions are:
      • Caching files and media content;
      • Access restriction;
      • Content filtering;
      • Speed restriction;
      • Logging and traffic control.
 All data, which is transmitted via HTTP-proxy is easy intercepted by ISP or cyber-criminals:

• HTTPS-proxy. It is the same as HTTP-proxy, but with SSL-protocol support for safe connection. Traffic that pass through HTTPS-proxy is strong encrypted in the client’s browser, therefore no one knows, what data is transmitted.

• SOCKS-proxy. It is the most progressive proxy-server, to data transmission. It works via SOCKS-protocol, which was developed specially to secure work with any protocols and any data or internet-services. The special feature of the Socks-proxy is an ability to provide a connection of a client with a server, which is behind a firewall. Now two versions of the Socks-proxy are available. They are based on Socks4 and Socks5 protocols. The last works via TCP and UDP, supports login/password authorization and remotes DNS-requests.

 At the end it is needed to point out two main items. Free proxy is more anonymous, but not reliable or secure, because of the way of its creation. No matter what type of proxy is used, high-level protection or anonymity is possible when VPN is also used.

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