Proxy

A reverse proxy and HTTPS termination service using OpenResty/nginx with a management API and web GUI.

Documentation: https://theta42.github.io/proxy/

Features

• Automated HTTPS/SSL certificate management via Let's Encrypt
• Support for HTTP-01 (auto-ssl) and DNS-01 (wildcard) ACME challenges
• Multiple DNS provider integrations (CloudFlare, DigitalOcean, PorkBun)
• Wildcard SSL certificate support with automatic renewal
• Dynamic host routing with wildcard domain matching (*, **)
• Web-based management interface
• RESTful API for automation
• User authentication and management
• Unix socket-based host lookup for high-performance routing

Requirements

• Node.js 18+ (tested with 18.x, 20.x, 22.x)
• OpenResty (nginx with Lua support)
• Redis
• Modern Linux distribution (tested on Ubuntu 20.04+, Debian 11+)
• Inbound internet access for Let's Encrypt validation
• Root access (required for user management features)

Quick Install

An automated installer is available for modern Debian-based systems:

wget -O - https://raw.githubusercontent.com/theta42/proxy/master/ops/install.sh | sudo bash

This installer will:

• Install Node.js 20.x
• Install OpenResty and required dependencies
• Install and configure Redis
• Set up SSL fallback certificates
• Install Lua dependencies (lua-resty-auto-ssl, luasocket)
• Clone and install the proxy application
• Configure systemd service
• Start the proxy service

Manual Installation

For manual installation or other distributions, see the detailed steps below.

System Dependencies

Ubuntu/Debian:

apt install libpam0g-dev build-essential redis-server luarocks -y

Node.js 20.x:

curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | sudo gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
NODE_MAJOR=20
echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | sudo tee /etc/apt/sources.list.d/nodesource.list
apt update && apt install nodejs -y

OpenResty:

wget -O - https://openresty.org/package/pubkey.gpg | sudo gpg --dearmor -o /usr/share/keyrings/openresty.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/openresty.gpg] http://openresty.org/package/ubuntu $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/openresty.list
apt update && apt install openresty -y

Lua Dependencies:

luarocks install lua-resty-auto-ssl
luarocks install luasocket

SSL Configuration

Create fallback SSL certificates:

mkdir -p /etc/ssl/
openssl req -new -newkey rsa:2048 -days 3650 -nodes -x509 \
  -subj '/CN=sni-support-required-for-valid-ssl' \
  -keyout /etc/ssl/resty-auto-ssl-fallback.key \
  -out /etc/ssl/resty-auto-ssl-fallback.crt

OpenResty Configuration

Configuration files are provided in ops/nginx_conf/:

• nginx.conf - Main nginx configuration
• autossl.conf - Auto-SSL configuration for Let's Encrypt HTTP-01
• proxy.conf - Proxy server configuration with host lookup
• targetinfo.lua - Lua module for host lookup via Unix socket

Copy these files to /etc/openresty/:

mkdir -p /etc/openresty/sites-enabled/
cp ops/nginx_conf/nginx.conf /etc/openresty/nginx.conf
cp ops/nginx_conf/autossl.conf /etc/openresty/autossl.conf
cp ops/nginx_conf/proxy.conf /etc/openresty/sites-enabled/000-proxy
cp ops/nginx_conf/targetinfo.lua /usr/local/openresty/lualib/targetinfo.lua

Application Setup

Clone and install:

cd /var/www
git clone https://github.com/theta42/proxy.git
cd proxy/nodejs
npm install

Create systemd service:

cp ops/proxy.service /etc/systemd/system/proxy.service
systemctl daemon-reload
systemctl enable proxy.service
systemctl start proxy.service

DNS Provider Configuration

For wildcard SSL certificates, configure a DNS provider via the web UI or API:

Supported providers:

• CloudFlare - Requires API token
• DigitalOcean - Requires API token
• PorkBun - Requires API key and secret API key

Once configured, create a wildcard host (e.g., *.example.com) and the system will automatically request and manage the DNS-01 challenge certificate.

Architecture

The system consists of three main components:

1. OpenResty/Nginx - Frontend proxy with Lua-based routing

   • Handles SSL termination via lua-resty-auto-ssl
   • Queries Node.js backend via Unix socket for host routing
   • Proxies requests to configured backend servers

2. Node.js API - Backend management and control plane

   • RESTful API for host/user/DNS management
   • Wildcard SSL certificate orchestration
   • Host lookup tree with wildcard matching
   • User authentication and authorization

3. Redis - Data store (using model-redis ORM)

   • Host configurations
   • User accounts and tokens
   • SSL certificate storage
   • Domain and DNS provider configurations

Host Lookup System

The proxy supports sophisticated domain matching:

• Exact match: example.com matches only example.com
• Single wildcard: *.example.com matches sub.example.com but not deep.sub.example.com
• Double wildcard: **.example.com matches any depth (sub.example.com, deep.sub.example.com, etc.)
• Mixed wildcards: api.*.example.com matches api.v1.example.com, api.v2.example.com, etc.

Priority: Exact match > Single wildcard > Double wildcard

Development

Running locally:

cd nodejs
npm install
npm run dev  # Runs with nodemon for auto-reload

Running tests:

npm test              # Run all tests
npm run test:unit     # Run unit tests only
npm run test:watch    # Watch mode for development

Tests use Node.js built-in test runner (requires Node 18+).

API Documentation

See API Documentation for complete API reference.

Contributing

Pull requests are welcome. The project uses GitHub Actions for CI/CD:

• Tests run automatically on all PRs
• All tests must pass before merging to master
• Tests run on Node.js 18.x, 20.x, and 22.x

License

MIT - See LICENSE file for details.

Project Structure

proxy/
├── nodejs/              # Node.js backend application
│   ├── bin/            # Entry point (www)
│   ├── models/         # Data models (Host, User, DNS providers)
│   ├── routes/         # API routes
│   ├── services/       # Background services (host lookup, scheduler)
│   ├── middleware/     # Express middleware
│   ├── utils/          # Utility functions
│   ├── public/         # Static web assets
│   ├── views/          # EJS templates
│   └── test/           # Test suite
├── ops/                # Operations and deployment
│   ├── nginx_conf/     # OpenResty configuration files
│   ├── install.sh      # Automated installer
│   └── proxy.service   # Systemd service definition
└── .github/workflows/  # CI/CD workflows