mrrowisp

A Wisp server written in Go, with a Node.js wrapper for spawning and load-balancing across multiple worker processes.

mrrowisp supports Wisp v1, v2, and optionally Twisp (PTY over Wisp). It includes flood protection, per-source/per-destination rate limiting, IP scoring, an egress allow/deny policy, a DNS cache, and reverse-proxy IP parsing.

Features

• Wisp v1 and v2 (enableV2) over WebSocket
• Optional Twisp (enableTwisp)
• TCP and UDP stream support (allowTCP, allowUDP)
• Hostname/port allow and block lists
• Direct IP, private IP, and loopback egress controls
• Flood protection: per-source, per-destination, SYN flood detection
• IP reputation with on-disk persistence and decay
• Bandwidth and connection rate limits per IP
• Optional password authentication
• Optional upstream HTTP/SOCKS proxy
• Reverse-proxy real-IP parsing (CF-Connecting-IP, X-Forwarded-For, ...)
• Optional static file serving alongside the /wisp endpoint

Installing

From source (Go)

Requires Go 1.25+.

go build -o mrrowisp main.go

Or build cross-platform binaries into ./bin/:

./build.sh

Docker

docker build -t mrrowisp .
docker run -p 6001:6001 -v $(pwd)/config.json:/app/config.json mrrowisp

npm / pnpm (Node.js wrapper)

pnpm install mrrowisp

Running the standalone server

./mrrowisp --config config.json

Flags:

• --config <path|json> – path to a config file or an inline JSON string
• --port <n> – override the port from config
• --allow-loopback – override allowLoopbackIPs

If no --config is supplied, the built-in defaults from wisp.DefaultConfig() are used.

See example.config.json for the full list of supported options.

Using the Node.js wrapper

The wrapper spawns one or more mrrowisp Go processes and the built-in load balancing routes incoming WebSocket upgrades across them.

import { Mrrowisp } from "mrrowisp";
import { createServer } from "node:http";

const wisp = new Mrrowisp({ port: 6001, logLevel: "info" });
await wisp.start(4); // spawn 4 workers, which would route to 6001, 6002, 6003, and 6004 or similar automatically

const server = createServer();
server.on("upgrade", (req, socket, head) => wisp.route(req, socket, head));
server.listen(8080);

API:

• new Mrrowisp(partialConfig?) – overrides merged onto defaults loaded from dist/config.json
• start(count = 1) – spawn N worker processes, each on its own port
• route(req, socket, head) – proxy a WebSocket upgrade to the next worker
• stop() – SIGTERM all workers
• kill() – SIGKILL all workers

Configuration

The full schema lives in example.config.json and wisp/config.go. Featured keys:

Credits

• soap phia – Writing mrrowisp
• Amplify – Adding protections against flooding

License

BSD-3-Clause. See LICENSE.