


What should I do if PHP cannot open the internal network when opening the external network?
There is a problem that has troubled many PHP developers recently, that is, the intranet can be accessed from the external network, but cannot be accessed from the internal network. This problem can be tricky, but it's not that difficult to solve.
First of all, we need to understand the cause of this problem. When we access the external network from the internal network, we usually access it through NAT conversion. NAT conversion will not only map the external network IP to the internal network, but also map the requested port. However, when accessing the internal network from the external network, because the IP of the internal network is a private IP, it cannot be directly accessed by the external network. Therefore, we need to perform a reverse proxy to allow the external network to access the internal network.
Let’s take a look at how to solve this problem. Suppose our external network domain name is "www.example.com" and the internal network IP is "192.168.1.100", then we can solve this problem by deploying a reverse proxy service on the external network. This can be achieved by using common reverse proxy servers like Nginx or Apache.
On Nginx, we can implement reverse proxy by editing the Nginx configuration file. First, add the following code to the Nginx configuration file:
server { listen 80; server_name www.example.com; location / { proxy_pass http://192.168.1.100:80; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } }
The function of this code is to proxy all access requests to "www.example.com" to the IP in the intranet. Among them, the proxy_pass
parameter specifies the IP address and port number in the intranet. proxy_set_header
Parameters are used to set some header information to make the code more accurate when proxying. For specific information, please refer to Nginx official documentation.
On Apache, we can use the mod_proxy module to implement reverse proxy. First, you need to enable the mod_proxy module in httpd.conf:
LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_http_module modules/mod_proxy_http.so
Then, add the following code in the configuration file:
<virtualhost> ServerName www.example.com ProxyRequests Off ProxyPass / http://192.168.1.100:80/ ProxyPassReverse / http://192.168.1.100:80/ ErrorLog logs/reverse-proxy-error.log CustomLog logs/reverse-proxy-access.log common </virtualhost>
The function of this code is to remove all pairs of "www.example. com" access requests are proxied to the IP in the intranet. Among them, ProxyPass
specifies the IP address and port number in the intranet, and ErrorLog
and CustomLog
are used to set the paths of the error log and access log respectively. For specific information, please refer to Apache official documentation.
To summarize, to solve the problem that PHP cannot be opened on the external network and cannot be opened on the internal network, you need to deploy a reverse proxy service on the external network. By configuring a reverse proxy, we can proxy all external network requests to the internal network, thereby realizing communication between the internal network and the external network.
The above is the detailed content of What should I do if PHP cannot open the internal network when opening the external network?. For more information, please follow other related articles on the PHP Chinese website!

The article compares ACID and BASE database models, detailing their characteristics and appropriate use cases. ACID prioritizes data integrity and consistency, suitable for financial and e-commerce applications, while BASE focuses on availability and

The article discusses securing PHP file uploads to prevent vulnerabilities like code injection. It focuses on file type validation, secure storage, and error handling to enhance application security.

Article discusses best practices for PHP input validation to enhance security, focusing on techniques like using built-in functions, whitelist approach, and server-side validation.

The article discusses strategies for implementing API rate limiting in PHP, including algorithms like Token Bucket and Leaky Bucket, and using libraries like symfony/rate-limiter. It also covers monitoring, dynamically adjusting rate limits, and hand

The article discusses the benefits of using password_hash and password_verify in PHP for securing passwords. The main argument is that these functions enhance password protection through automatic salt generation, strong hashing algorithms, and secur

The article discusses OWASP Top 10 vulnerabilities in PHP and mitigation strategies. Key issues include injection, broken authentication, and XSS, with recommended tools for monitoring and securing PHP applications.

The article discusses strategies to prevent XSS attacks in PHP, focusing on input sanitization, output encoding, and using security-enhancing libraries and frameworks.

The article discusses the use of interfaces and abstract classes in PHP, focusing on when to use each. Interfaces define a contract without implementation, suitable for unrelated classes and multiple inheritance. Abstract classes provide common funct


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Dreamweaver Mac version
Visual web development tools

WebStorm Mac version
Useful JavaScript development tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.