Introducing Nginx, forward proxy and two examples of implementing reverse proxy

Nginx is a high-performance open source web server and reverse proxy server with lightweight, scalable and high concurrency processing capabilities. It is widely used to build reliable and efficient Web applications and services.

Forward proxy is a proxy server application mode that acts as a middleman for the client to help the client communicate with the target server. For example, when a client cannot access certain websites directly, access can be achieved through a forward proxy. In this case, the client sends a request to the proxy server, and the proxy server forwards the request to the target server, which ultimately

Suppose there is a network environment within the company, and employees need to access external Internet resources through a proxy server. In this case, the proxy server acts as a forward proxy, receiving requests from internal employees and forwarding the requests to the target server on the Internet. Proxy servers can cache responses, increase access speed, and provide better security and control.

Reverse proxy is a proxy server application mode. It is a way for the server to provide services to the client. Here are two examples of implementing a reverse proxy:

1. Load balancing: In a high-load web application environment, using a reverse proxy can distribute requests to multiple back-end servers to achieve load balancing. The reverse proxy server can dynamically forward requests to the idlest server based on the server's load, thereby improving overall performance and reliability.
2. SSL terminal proxy: The reverse proxy can also be used as an SSL terminal proxy to handle SSL/TLS encrypted traffic. An encrypted connection is established between the client and the reverse proxy server, while an unencrypted connection can be used between the reverse proxy server and the backend server. This takes the load off the backend servers and provides greater security.

In general, Nginx is a powerful web server and reverse proxy server. It can allow internal employees to access external Internet resources through forward proxy, and at the same time implement functions such as load balancing and SSL terminal proxy through reverse proxy. . These application scenarios can effectively improve performance, stability and security, so Nginx has become one of the important tools for building efficient web applications.

The above is the detailed content of Introducing Nginx, forward proxy and two examples of implementing reverse proxy. For more information, please follow other related articles on the PHP Chinese website!