Explain what is Reverse Proxy Server?

A reverse proxy server is an intermediary server that sits between client devices and backend servers, acting on behalf of the servers to handle client requests. When a client sends a request for a resource, such as a web page or an application, the reverse proxy receives the request, processes it, and forwards it to the appropriate backend server based on predefined rules or configurations. Once the backend server processes the request and generates a response, the reverse proxy sends this response back to the client, making it appear as if the response originated from the proxy server itself.

Key Functions and Benefits of a Reverse Proxy Server

1. Load Balancing: A reverse proxy can distribute incoming client requests across multiple backend servers to ensure no single server is overwhelmed. This helps improve performance, scalability, and reliability by balancing the load evenly among servers[1][3][5].

2. Security: Reverse proxies enhance security by acting as a barrier between the internet and backend servers. They can filter out malicious traffic, such as hacking attempts or spam, and mask the IP addresses of backend servers, making it harder for attackers to target them directly[2][3][6].

3. Caching: Reverse proxies can cache frequently accessed content, such as images, CSS files, and JavaScript. By serving cached content directly to clients, they reduce the load on backend servers and improve response times[2][3][5].

4. SSL Termination: Reverse proxies can handle SSL encryption and decryption, offloading this task from backend servers. This not only improves performance but also centralizes SSL certificate management, enhancing security[2][3][5].

5. Content Filtering and Monitoring: Reverse proxies can monitor and filter incoming requests, providing insights into traffic patterns and potential security threats. They can also enforce access control policies and rate limiting to prevent abuse[1][3][5].

6. Scalability and Flexibility: By adding or removing backend servers as needed, reverse proxies provide scalability and flexibility to web applications, allowing them to handle varying levels of traffic without downtime[1][3][5].

How a Reverse Proxy Works

1. Request Interception: A client sends a request to a web application by entering a URL or clicking a link.
2. Request Examination: The reverse proxy intercepts the requ...