A reverse proxy sits in front of one or more servers and handles incoming requests on their behalf. To the outside world it looks like the server itself, but behind the scenes it routes, caches, secures, and balances traffic. It is one of the most useful pieces of infrastructure you can put in front of a web application.
Forward Proxy vs Reverse Proxy
A forward proxy acts on behalf of clients, sending their requests out to the internet, often to filter or anonymize traffic. A reverse proxy does the opposite: it acts on behalf of servers, receiving requests from clients and passing them to the right backend. The client never talks to your application server directly.
How a Reverse Proxy Works
When a request arrives, the reverse proxy decides what to do with it. It may serve a cached response, terminate the TLS connection, apply security rules, and then forward the request to a backend server. The backend's reply travels back through the proxy to the client, so the proxy can inspect and modify traffic in both directions.
Load Balancing
One of the most common jobs of a reverse proxy is spreading traffic across several backend servers. By distributing requests using strategies like round robin or least connections, it prevents any one server from being overwhelmed and keeps your application responsive as traffic grows.
TLS Termination
A reverse proxy can handle the TLS handshake and decrypt HTTPS traffic at the edge, then talk to backends over a faster internal connection. This centralizes certificate management in one place and takes the encryption workload off your application servers.
Caching and Compression
By caching responses and compressing content, a reverse proxy reduces load on your backends and speeds up delivery to clients. Frequently requested pages and assets can be served straight from the proxy without ever touching the application, which is a quick win for performance.
Security Benefits
A reverse proxy hides the identity and address of your backend servers, presents a single entry point you can harden, and is a natural place to apply web application firewall rules, rate limiting, and request filtering. It also helps absorb and mitigate certain kinds of attacks before they reach your application.
Common Use Cases
Reverse proxies power load-balanced web clusters, microservice routing, API gateways, and edge caching layers. Popular software like Nginx, HAProxy, and Caddy are widely used for exactly these roles, and managed CDNs are essentially reverse proxies operated at global scale.
How Noded Can Help
Whether you want to load balance across servers, centralize TLS, or add a caching and security layer in front of your app, we can help you design and deploy a reverse proxy that fits your stack. Tell us what you are running and we will map out a clean setup.
FAQ
Is a reverse proxy the same as a load balancer?
They overlap. Load balancing is one feature a reverse proxy can provide, but reverse proxies also handle caching, TLS, and security. A dedicated load balancer focuses on distributing traffic, while a reverse proxy does that and more.
Do I need a reverse proxy for a single server?
You can benefit even with one backend. A reverse proxy still gives you TLS termination, caching, security filtering, and a clean place to add more servers later without changing how clients connect.
Does a reverse proxy slow things down?
The extra hop adds minimal latency, and the caching, compression, and offloading it provides usually make the overall experience faster. Properly configured, it is a net win for performance.
Is a CDN a reverse proxy?
Essentially yes. A CDN is a globally distributed reverse proxy that caches and serves your content from locations close to your visitors while shielding your origin server.