Fundamentals of Proxy Server Application Raiders

What is a proxy server?

The proxy server is a server between the browser and the web server. When you browse the Internet through the proxy server, the browser does not directly retrieve the web page from the web server, but sends the proxy server Request, the proxy server to retrieve the information needed by the browser and send it to your browser.

What is a free proxy server?

When searching for a proxy server address using a software such as a proxy hunter, words like "Password" and "Free" appear in the verification status bar. If you set the "Free" address as a proxy server, you will find that you are not required to enter a password when accessing the web page. This is the "free proxy server." Why is there a free? There are several cases:

1. It is a system vulnerability. Once it is discovered by the network management, it will be blocked.

2. It is a kind network administrator and other people who have the opportunity to approach the host. The machine is set up as a proxy server;

3. It is a real good-hearted person, that is, to use his own machine as a free agent to benefit the vast number of colleagues. This is really worthy of admiration! However, the closure was also the fastest.

4. ISPs are free to open for a period of time in order to improve their impact, generally very short.

Benefits of Using a Proxy Server

Proxy Server (Proxy Server) is an important security feature provided by Internet link-level gateways. Its work is mainly in Open Systems Interconnection (OSI). Type of dialogue layer, the main functions are:

Break through its own IP access restrictions:

1. Visit foreign sites. Internet users such as Education Network and 169 Network can access foreign websites through agents.

2. Access some units or groups of internal resources, such as a university FTP (provided that the agent address is within the allowed access scope of the resource), use the free proxy server in the address segment of the education network, you can use All kinds of FTP download and upload, and various types of data query and sharing services open to the education network.

3. Breaking through China Telecom's IP blockade: Chinese telecommunications users have many websites that are restricted from access. This restriction is artificial. Different Serve's blockade of addresses is different. So if you can't access it, you can try another foreign proxy server.

4. Improve access speed: usually the proxy server sets a large hard disk buffer, when there is outside information, it is also saved to the buffer, when other users access the same When the information is received, the information is directly taken out from the buffer and transmitted to the user to improve the access speed.

5. Hide real IP: Internet users can also hide their IP from this attack.

6. Free.