What are the main ways to attack PHP websites? Common attack methods: 1. Command injection, 2. eval injection, 3. Client script attack, 4. Cross-site scripting attack,

What is a DDOS attack?

I believe everyone has heard of DoS attacks, DDoS attacks and DRDoS attacks! DoS is the abbreviation of DenialofService, which means denial of service, and DDoS is the abbreviation of DistributedDenialofService, which is distributed denial of service, and DRDoS is the abbreviation of DistributedReflectionDenialofService. In short, this means distributed reflective denial of service

Analyze the reasons why websites are frequently attacked and how to prevent them?

The main reasons why websites are often hacked are as follows:

1. Cross-site scripting (XSS)

XSS vulnerabilities are the most common and most common. A fatal web application security vulnerability occurs when an application sends user data to a web browser that does not authenticate or encode the content. Hackers can use malicious scripts in browsers to obtain user data, deface websites, insert harmful content, and launch phishing and malicious attacks.

2. Injection vulnerability

When the data provided by the user is sent to the converter as part of the command (converting the text command into an executable machine command), the hacker will deceive converter. An attacker can exploit injection vulnerabilities to create, read, update, or delete arbitrary data on the application software. In the worst case scenario, attackers can exploit these vulnerabilities to completely control the application software and the underlying system, and even bypass the underlying firewall of the system.

3. Malicious file execution

Hackers can remotely execute code, remotely install rootkits, or completely compromise a system. Any web application that accepts filenames or files from the user is vulnerable. The vulnerability may have been written in PHP, a scripting language most commonly used in web development.

4. Cross-site command forgery

This attack is simple but destructive. It can control the victim's browser and then send malicious commands to the network application software. Such sites are vulnerable, in part because they authorize commands based on session cookies or "auto-memory" features. Banks are potential targets.

5. Information leakage and improper error handling

The error messages generated by various application software and displayed to users are also useful to hackers. Private information, software configurations or other internal data are leaked.

6. Insecure authentication and session management

If the application software cannot protect the authentication certificate and session ID from beginning to end, the user's administrator account will be compromised. Privacy violations and the fundamentals of authentication systems should be noted and effectively monitored.

7. Insecure encrypted storage devices

Although encryption itself is also an important part of most network application software, many network developers do not pay attention to the sensitive data in storage. Encrypt. Even existing encryption technology is shoddily designed.

8. Insecure communication

Similar to the 8th vulnerability, this vulnerability occurs because the network is not circulated when communications containing sensitive information need to be protected. The data is encrypted. Attackers can obtain a variety of unprotected session content including the transmission of certificates and sensitive information. Therefore, the PCI standard requires that credit card information transmitted over the network be encrypted.