What is reverse proxy?

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A reverse proxy is a type of server that sits between client devices (like browsers or mobile apps) and backend servers, forwarding client requests to the appropriate server and then returning the response. Unlike a forward proxy (used by clients to access external resources), a reverse proxy is placed on the server side to protect, optimize, and manage incoming traffic.

🔹 Key Functions of a Reverse Proxy:

1. Load Balancing – Distributes client requests across multiple backend servers to improve performance and availability.

2. Security – Hides the identity and details of backend servers, acting as a shield against attacks such as DDoS.

3. SSL Termination – Handles HTTPS encryption/decryption, reducing the workload on backend servers.

4. Caching – Stores frequently accessed responses to serve clients faster and reduce server load.

5. Compression & Optimization – Reduces response size to improve speed.

🔹 Example:
When you access https://example.com, your request might first hit a reverse proxy like Nginx or Apache, which then routes it to one of several application servers. The client never knows the actual internal server addresses.

✅ Summary:
A reverse proxy improves performance, scalability, and security by acting as a gateway between clients and backend servers, ensuring smooth and protected communication.

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