Home

What are the methods to prevent crawlers?

Anti-crawler methods include Robots.txt text, User-Agent filtering, IP restrictions, verification codes, dynamic page generation, frequency limits, dynamic URL parameters and anti-crawler technology. Website administrators can choose appropriate methods to protect the security of the website and the privacy of users according to their own needs.

258

nginx user-agent ip Features are simple and easy to learn The syntax is flexible. Can be used to send verification codes php cms dynamic page php programming Anti-crawler technology Website protection reptile Anti-crawlers

Table of Contents

What are the methods to prevent crawlers?

Configuring the User-Agent method of filtering crawlers in Nginx

It's hard to see at first glance, it's basically a useragent called "yisouspider" that flooded the screen. I don't know where the spider is from at first glance. It's so shameless. Find the root directory configuration area, add the useragent filter judgment statement, and find that the one called "yisouspider" directly returns 403 Note 1: If you need to add multiple filters, do this ($http_user_agent~*"spider1|spider2|spider3|spider4"), in the middle Just separate them with | Note 2: If you are using a subdirectory blog, like mine, then you need to find

May 27, 2023 am 08:46 AM

nginx user-agent

How do websites set black/whitelist IP restrictions and country and city IP access restrictions through nginx?

1. Black/white list IP restricted access configuration nginx There are several ways to configure black and white lists. Here are only two commonly used methods. 1. The first method: allow, denydeny and allow instructions belong to ngx_http_access_module. nginx loads this module by default, so it can be used directly. This method is the simplest and most direct. The setting is similar to the firewall iptable. How to use: Add directly to the configuration file: #Whitelist settings, followed by allow is accessible IPlocation/{allow123.13.123.12;allow23.53.32.1/100;denyall;}#Blacklist settings,

Jun 01, 2023 pm 05:27 PM

nginx ip

PHP SMS verification code function development tutorial

PHP SMS Verification Code Function Development Tutorial With the popularity and influence of mobile phones, SMS verification codes have become an important verification method in many websites and applications. In PHP development, how to implement the SMS verification code function? This article will introduce you to a simple and practical method for developing the SMS verification code function. To use the SMS verification code function to register an SMS platform account, you first need to register an SMS platform account. There are many SMS platform providers on the market, such as Alibaba Cloud SMS, Rongyun Cloud Communications, etc. After registering an account, you will receive APIKe

Sep 21, 2023 am 10:48 AM

Features are simple and easy to learn The syntax is flexible. Can be used to send verification codes

How to use PHP to implement the dynamic page generation function of CMS system

How to use PHP to implement the dynamic page generation function of the CMS system. With the development of the Internet, the CMS (Content Management System) system has become an essential tool for many websites. A good CMS system can not only manage the content of the website, but also generate dynamic pages. This article will introduce how to use PHP language to realize the dynamic page generation function of CMS system, and provide relevant code examples. 1. Basic principles of dynamic page generation Dynamic page generation refers to the

Aug 26, 2023 pm 07:58 PM

php cms dynamic page

Usage example of php frequency limit class

This article brings you usage examples of the PHP frequency limit class. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Apr 01, 2019 am 09:28 AM

php

How PHP handles dynamic URL parameters (4 ways)

In web development, we often need to dynamically generate page content based on input parameters. URL parameters are a common way to implement this mechanism. As a powerful web programming language, PHP naturally provides many convenient methods for developers to handle URL parameters. Let's introduce how to set dynamic URL parameters in PHP. 1. Obtain URL parameters through GET method. The GET method is a request method in the HTTP protocol. It can be used to request a certain resource from the server, and can also request the service through URL parameters.

Apr 11, 2023 am 10:34 AM

How PHP implements anti-crawler technology and protects website content

With the development of the Internet, the content of websites has become more and more abundant, attracting more and more users to visit. But the problem that comes with it is that it is attacked by malicious crawlers, causing website content to be crawled and stolen. Therefore, how to use anti-crawler technology to protect website content has become a problem that every webmaster must solve. PHP is a popular open source scripting language that is easy to learn and powerful. So how to use PHP to implement anti-crawler technology? The following will explain it to you in detail. 1. Set HTTP request headers

Jun 27, 2023 am 08:36 AM

php programming Anti-crawler technology Website protection

What are the methods to prevent crawlers?

Anti-crawler methods include Robots.txt text, User-Agent filtering, IP restrictions, verification codes, dynamic page generation, frequency limits, dynamic URL parameters and anti-crawler technology. Detailed introduction: 1. Robots.txt file, used to tell search engine crawlers which pages can be accessed and which pages are prohibited from accessing; 2. IP restrictions, used to tell the server what browser or crawler is used; 3. Verification code, you can Prevent some malicious crawlers from collecting large-scale data on the website, etc.

Oct 12, 2023 am 10:25 AM

reptile Anti-crawlers