Introduction

Qrux is a QUIC / HTTP/3–terminating proxy that forwards traffic to plain TCP / HTTP/1.1 backends.

Client (HTTP/3 over QUIC) ──→ [Qrux] ──→ Backend (HTTP/1.1 over TCP)

Features

• QUIC with TLS 1.3 (quinn + rustls)
• HTTP/3 support
• SNI / Host–based routing to multiple backends
• Round-robin load balancing across multiple upstreams
• Upstream TCP connection pooling
• Prometheus metrics (/metrics)
• HTTPS fallback with Alt-Svc for browser HTTP/3 discovery
• 0-RTT support for returning clients (understand the tradeoffs — see Security)

Links

• Crates.io (releases, metadata): crates.io/crates/qrux
• Source code & issues: github.com/dedsecrattle/Qrux
• This book (GitHub Pages): dedsecrattle.github.io/Qrux

License

MIT.