Security guide

What is a reverse proxy?

A reverse proxy sits in front of your application, receives traffic first, and forwards safe requests to the backend. That position makes it useful for routing, caching, load balancing and security.

Short answer

A reverse proxy is the front door for your app.

Users connect to the reverse proxy, not directly to your app server. The proxy can inspect requests, enforce policy, route traffic and inspect responses before anything reaches the public internet.

How a reverse proxy works

In a direct setup, a browser or API client talks to the application server. In a reverse-proxy setup, the client talks to the proxy first. The proxy then forwards the request to the right backend and returns the response.

Because every request passes through it, the reverse proxy becomes a practical place to add controls without changing application code.

Client sends request to proxy
Proxy applies routing and policy
Backend receives approved traffic
Proxy returns or inspects the response

Common reverse proxy use cases

Teams use reverse proxies for TLS termination, load balancing, caching, routing multiple services through one domain and adding a security layer before the app.

Security-focused reverse proxies can block suspicious payloads, enforce rate limits, detect API abuse and prevent sensitive data from leaving the application.

TLS termination
Load balancing
Path-based routing
Rate limiting
Runtime security inspection

Why reverse proxies matter for security

A reverse proxy can be added in front of apps written in any language. That is useful when a team needs protection quickly but cannot rewrite the application.

Silker uses this model for runtime security: it can run as a Docker reverse proxy, inspect incoming requests and outgoing responses, and feed security events into the dashboard.

FAQ

Is a reverse proxy the same as a forward proxy?

No. A forward proxy sits in front of clients and hides or controls outbound client traffic. A reverse proxy sits in front of servers and controls inbound traffic to applications.

Can a reverse proxy improve application security?

Yes. A reverse proxy can enforce rate limits, block suspicious requests, inspect responses and add protection without changing backend application code.

Does a reverse proxy replace a WAF?

Not always. Some reverse proxies include WAF-like security controls, while traditional WAFs often run as reverse proxies. Silker uses the reverse-proxy position for runtime app security and response inspection.

Cloudflare WAF alternative Best WAF guide How to secure an API

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