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Zentinel

Zentinel — a secure, high-performance reverse proxy with programmable security agents

Zentinel

A security-first reverse proxy built to guard the free web

Website · Docs · Agent registry · GitHub

Zentinel is a reverse proxy written in Rust on Pingora. The core does routing, TLS, load balancing and caching, and stays small. Security and middleware concerns run as agents: separate processes the proxy talks to over agent protocol v2, each with its own timeout and failure mode, so a crashing or slow agent is bounded instead of taking the proxy down.

Core

Repository What it does
zentinel The proxy: routing, TLS, load balancing, caching and the agent pipeline
zentinel-modsec Pure Rust ModSecurity rule engine with OWASP CRS compatibility
zentinel-convert Converts nginx, HAProxy, Traefik, Caddy and Envoy configs to Zentinel KDL (online)
zentinel-control-plane Fleet management for Zentinel proxies (Elixir/Phoenix)
zentinel-helm Helm chart for running Zentinel on Kubernetes
pingora Zentinel's Pingora fork, published as the zentinel-pingora-* crates
zentinel-hub Deprecated Go fleet manager, superseded by zentinel-control-plane

Security agents

Agent What it does
auth JWT, API keys, Basic, OIDC, SAML, mTLS client certificates, Cedar authorization
waf Pure Rust WAF with its own detection rules and anomaly scoring
zentinelsec ModSecurity-compatible WAF that loads the OWASP CRS, built on zentinel-modsec (no C dependencies)
modsec ModSecurity WAF through libmodsecurity bindings
denylist Blocks requests by IP, CIDR range and pattern
ratelimit Token bucket rate limiting
bot-management Bot detection and management
ip-reputation Checks client IPs against threat intelligence feeds and blocklists
ai-gateway Pattern-based prompt injection, jailbreak and PII checks for LLM API traffic
graphql-security GraphQL query depth, complexity and introspection control
grpc-inspector gRPC authorization, rate limiting and metadata inspection
websocket-inspector WebSocket content filtering, schema validation and rate limiting
soap SOAP/XML validation, WSDL enforcement and XXE protection
mqtt-gateway Topic ACLs, client auth and payload inspection for MQTT over WebSocket
content-scanner Malware scanning of request bodies with ClamAV
spiffe SPIFFE/SPIRE workload identity
policy Policy evaluation with Rego (OPA) and Cedar
audit-logger Structured audit logging with PII redaction

Extensibility and other agents

Agent What it does
lua Custom request/response logic in Lua
js Custom request/response logic in JavaScript (QuickJS)
wasm Runs WebAssembly modules in the request pipeline (wasmtime)
transform URL rewrites, header changes and JSON body transforms
image-optimization On-the-fly JPEG/PNG to WebP/AVIF conversion with caching
api-deprecation Deprecation/Sunset headers, redirects and blocking for retired endpoints
mock-server Configurable stub responses for testing
chaos Controlled fault injection for resilience testing

Every agent has a page in the agent registry.

SDKs

Build your own agent against agent protocol v2 (protocol docs).

Language Repository
Rust zentinel-agent-rust-sdk
Go zentinel-agent-go-sdk
Python zentinel-agent-python-sdk (install from the repository; not on PyPI)
TypeScript zentinel-agent-typescript-sdk
Kotlin zentinel-agent-kotlin-sdk
Elixir zentinel-agent-elixir-sdk
Haskell zentinel-agent-haskell-sdk

Sites and tooling

Repository What it does
zentinelproxy.io The website, zentinelproxy.io
zentinelproxy.io-docs Versioned documentation, docs.zentinelproxy.io
registry.zentinelproxy.io The agent registry, registry.zentinelproxy.io
api.zentinelproxy.io Static JSON API for agent registry and bundle metadata, used by zentinel bundle
design Design tokens and marks shared by the sites
zentinel-bench Benchmarks against Envoy, HAProxy and nginx (results)
wafworth WAF-agnostic test suite with confusion-matrix metrics and multi-WAF comparison
.github This organization profile

Part of Zentinel, the security-first reverse proxy. The shisa guards the gate.

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    A security-first reverse proxy built to guard the free web.

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