Nexus Proxy

A SOCKS5 proxy server with UDP ASSOCIATE support for HTTP/3 QUIC and gaming traffic.

About

This project was created to test UDP proxy support in ProxyBridge, a WinDivert-based Windows transparent proxy client.

Features

• TCP CONNECT: Standard TCP proxying
• UDP ASSOCIATE: Full bidirectional UDP relay with persistent sockets
• HTTP/3 QUIC Support: Maintains stable 5-tuple for QUIC connections
• CLI Arguments: Configurable host, port, and authentication
• Optional Authentication: Username/password support (RFC 1929)

Installation

npm install -g nexus-proxy

Or for development:

git clone https://github.com/InterceptSuite/nexus-proxy.git
cd nexus-proxy
npm install

Usage

Basic

node script.js

Default: 127.0.0.1:1080 with no authentication

With Options

# Listen on all interfaces
node script.js --host 0.0.0.0 --port 1080

# With authentication
node script.js --username user --password pass

# Show help
node script.js --help

CLI Options

• --host, -h: Bind IP address (default: 127.0.0.1)
• --port, -p: Listen port (default: 1080)
• --username, -u: Username for authentication (optional)
• --password, -P: Password for authentication (optional)

Testing

Configure your application to use SOCKS5 proxy at the configured address.

For HTTP/3 testing with ProxyBridge, this server provides the necessary UDP ASSOCIATE support with persistent relay sockets required for QUIC connections.

License

MIT