Introduction to FastProxy

FastProxy is a production-grade, high-performance service proxy designed to secure and accelerate east-west traffic in modern distributed systems. It combines wire-speed cryptography, signature verification, traffic governance, and observability into a single Go-native runtime that is easy to embed, automate, and operate.

Why FastProxy?

FastProxy addresses critical challenges in modern distributed systems:

Service-to-service security: Purpose-built for mesh-style microservices, serverless functions, and data pipelines where service-to-service trust boundaries are critical.
Performance at scale: Battle-tested modules for encryption, authentication, compression, and flow shaping with minimal latency overhead.
Go-native implementation: Lean core written in Go with first-class support for protobuf payloads and FastHTTP, enabling extreme throughput on commodity hardware.
Flexible deployment: Run it embedded within your application, drop it in as a sidecar, or operate it as a central ingress/egress gateway.

Key Features

High-Performance Architecture

FastProxy is built with performance in mind:

Optimized with FastHTTP for maximum throughput
Wire-speed encryption and decryption
Minimal latency overhead for typical operations
Designed to handle thousands of concurrent connections

Security-First Design

Symmetric and asymmetric encryption for inbound and outbound traffic
Signature verification and tamper detection across every hop
Per-endpoint throttling and circuit breaking
Built-in compression to reduce network footprint

Ecosystem Compatibility

First-class support for protobuf payloads
Integrates with common authentication providers
Compatible with standard HTTP/HTTPS traffic
Hooks for custom codecs and policy engines

Core Capabilities

Secure Transport: Symmetric and asymmetric encryption for inbound and outbound traffic with transparent key orchestration.
Traffic Integrity: Signature verification, request tracing, and tamper detection across every hop.
Adaptive Flow Control: Per-endpoint throttling, circuit breaking, and concurrency guards to protect downstream services.
Payload Optimization: Built-in compression/decompression to reduce network footprint without sacrificing fidelity.
Ecosystem Friendly: Protobuf-based transport primitives plus hooks for custom codecs, auth backends, and policy engines.
Operational Excellence: Native metrics, structured logging (zap), and deep observability integrations for production monitoring.

Architecture Overview

FastProxy is composed of modular components that can be combined to match your topology:

Center orchestrates service metadata, configuration, and dynamic rulesets.
InProxy / OutProxy handle ingress and egress enforcement, terminating secure channels and applying policy.
Server hosts upstream business logic or routes to existing services.
Client SDK offers first-class APIs for integrating FastProxy directly into Go applications.

The control/data plane split lets you evolve policies in real time without redeploying workloads.