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This article mainly explains the "what is the role of webshell", the content of the explanation is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "what is the role of webshell" bar!

What is webshell?

As the name implies, "web"-obviously requires the server to open up web services, "shell"-to gain access to the server to some extent.

Webshell is often referred to as anonymous users (intruders) who have some permission to operate the WEB server through the WEB service port, because it is mostly in the form of web scripts, and some people call it the website backdoor tool.

2. What is the function of webshell?

On the one hand, webshell is often used by webmasters for website management, server management, etc., according to the different rights of FSO, the functions are online editing web scripts, uploading and downloading files, viewing databases, executing arbitrary program commands, and so on.

On the other hand, it is used by intruders to achieve the purpose of controlling the website server. These web scripts are often called WEB

Script Trojans, currently popular asp or php Trojans, also have. Net-based script Trojans.

I am opposed to the latter. After all, people should be kind.

3. The concealment of webshell

Some malicious web page scripts can be nested and run in normal web pages and are not easy to detect and kill.

Webshell can pass through the server firewall, because the data exchanged with the controlled server or remote host is transmitted through port 80, so it will not be intercepted by the firewall. And the use of webshell generally will not leave a record in the system log, but will only leave some data submission records in the web log of the website. It is difficult for inexperienced administrators to see the signs of intrusion.

4. How to guard against malicious backdoors?

Fundamentally solve the security problem of dynamic web script, to achieve anti-injection, anti-riot library, anti-COOKIES spoofing, anti-cross-site attacks and so on, be sure to configure the server FSO permissions.

Those of you who have read this entry will post how you guard against malicious WEBSHELL backdoors. Thank you for your reading, the above is the content of "what is the role of webshell", after the study of this article, I believe you have a deeper understanding of the role of webshell, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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