Shulou(Shulou.com)06/03 Report--

This article mainly introduces "how does the computer system identify the agent IP". In the daily operation, I believe that many people have doubts about how the computer system identifies the agent IP. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "how the computer system identifies the agent IP". Next, please follow the editor to study!

1. Reverse detection technology.

Scan whether IP has opened the ports that are often opened by proxy servers such as 80 and 8080. It is obvious that the average user IP is unlikely to open the above ports.

2. The X_Forwarded_For of the HTTP header.

Enabling the IP of the HTTP agent can determine whether it is a proxy IP;. If there is XFF information, then the IP must be the proxy IP.

3. Keep-alive message.

If Keep-alive has a message from Proxy-Connection, then IP is undoubtedly the proxy IP.

4. Check the ports on IP. If some ports of an intellectual property are greater than 10, 000, then most IP also have problems.

It is almost impossible to open such a large port for the intellectual property of the average household.

Almost all of these four proxy IP detection methods are public, and some large companies will take other methods to avoid malicious IP. For example, a web crawler is used to crawl a proxy IP and mark it. What is more, malicious IP is collected through the business model, and then protocol scanning is used to determine whether these IP are proxy IP.

At this point, the study of "how does the computer system identify the agent IP" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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