How Nginx reverses Apache to achieve web security

How Nginx reverses Apache to achieve Web security

With the development of the Internet, Web security has become the focus of people's attention. In order to ensure the security and reliability of their web servers, many website administrators choose to use reverse proxy software to protect their sites. Among many reverse proxy software, Nginx is popular for its fast, efficient, flexible and reliable features. This article will introduce how to use Nginx to reverse Apache to achieve web security.

What is a reverse proxy?

First, we need to understand what a reverse proxy is. In the case of a traditional forward proxy, the client makes a request to the proxy server, which forwards the request to the real server and returns the result. On the contrary, in a reverse proxy, the client sends the request to the proxy server, and the proxy server forwards the request to the real server according to predefined rules and returns the result to the client. Reverse proxy can hide the real IP address of the server and improve system security.

Comparison of Nginx and Apache

Apache is a powerful web server software with a wide range of functions and numerous plug-in support. However, its low efficiency may lead to system paralysis under high concurrency and high load conditions. Nginx is a lightweight web server software with excellent features such as high efficiency, high concurrency and low memory usage. It is widely used in large websites and high-throughput applications.

Use Nginx to reverse Apache to achieve Web security

Now, we will introduce how to use Nginx to reverse Apache to achieve Web security. The specific steps are as follows:

1. Install Nginx and Apache

If you have not installed Nginx and Apache, run the following command to install it:

sudo apt- get install nginx
sudo apt-get install apache2

2. Configure Apache

We need to set up the network interface in Apache and listen to the specified IP and port. Run the following command to add the following content in the Apache configuration file:

sudo nano /etc/apache2/ports.conf

Listen 127.0.0.1:8080

3. Configuration Nginx reverse proxy

To reverse proxy Apache in Nginx, we need to define the following two places:

• upstream: Define the load balancing back-end server, that is, the Apache server
• server: Server information for reverse proxy configuration

Edit Nginx configuration file:

sudo nano /etc/nginx/nginx.conf

Add the following content under the http tag:

upstream backend {

server 127.0.0.1:8080;

}

server {

listen 80;
server_name example.com;

location / {
    proxy_pass http://backend;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

}

here upstream points to the port number on the Apache server, server_name specifies the domain name, and location points to the default route:

proxy_pass http://backend; the backend here must be consistent with the upstream name above.

proxy_set_header ##proxy_set_header Nginx and Apache server services, run the following command:

sudo systemctl restart nginx

4. Summary

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