What is a reverse proxy and how can it be implemented?

A reverse proxy is a server that accepts requests from clients and forwards them to one or more internal servers. The client interacts only with the reverse proxy, unaware of the actual servers processing the requests. This allows load balancing, caching responses, ensuring security, and hiding the internal network structure.

A reverse proxy can be implemented using:

• Nginx — a popular web server with reverse proxy capabilities.
• Apache HTTP Server with the mod_proxy module.
• HAProxy — a specialized load balancer.
• Traefik — a modern proxy with microservices support.

Example of an Nginx configuration for a reverse proxy:

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://backend_server;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
}