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🔄 Reverse Proxy Configuration

Reverse Proxies​

Running Fiber behind a reverse proxy is a common production setup.
Reverse proxies can handle:

  • HTTPS/TLS termination (offloading SSL certificates)
  • Protocol upgrades (HTTP/2, HTTP/3 support)
  • Request routing & load balancing
  • Caching & compression
  • Security features (rate limiting, WAF, DDoS mitigation)

Some Fiber features (like SendEarlyHints) require HTTP/2 or newer, which is easiest to enable using a reverse proxy.

Enabling HTTP/2​

Popular choices include Nginx and Traefik.

Nginx Example
nginx.conf
server {
    listen 443 ssl;
    http2 on;
    server_name example.com;

    ssl_certificate     /etc/ssl/certs/example.crt;
    ssl_certificate_key /etc/ssl/private/example.key;

    location / {
        proxy_pass http://127.0.0.1:3000;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

This configuration enables HTTP/2 with TLS and proxies requests to your Fiber app on port 3000.

Traefik Example
traefik.yaml
entryPoints:
  websecure:
    address: ":443"

http:
  routers:
    app:
      rule: "Host(`example.com`)"
      entryPoints:
        - websecure
      service: app
      tls: {}

  services:
    app:
      loadBalancer:
        servers:
          - url: "http://127.0.0.1:3000"

With this configuration, Traefik terminates TLS and serves your app over HTTP/2.

HTTP/3 (QUIC) Support​

Early Hints (103 responses) are defined for HTTP and can be delivered over HTTP/1.1 and HTTP/2/3. In practice, browsers process 103 most reliably over HTTP/2/3. Many reverse proxies also support HTTP/3 (QUIC):

  • Nginx
  • Traefik

Enabling HTTP/3 is optional but can provide lower latency and improved performance for clients that support it. If you enable HTTP/3, your Early Hints responses will still work as expected. For more details, see the official documentation: