Give any service a real domain name and trusted HTTPS — reachable from your LAN or the entire internet.

dynamoip is a Node.js reverse proxy and DNS automation tool. It assigns stable domain names and trusted HTTPS certificates to local services so they're reachable from any device on your network — or the entire internet — with one command.

Three modes

Max mode

Uses Cloudflare Tunnel to expose services to the public internet. No port forwarding, no firewall rules, no inbound ports.

cloudflared installs itself on first run
Cloudflare manages TLS — no certificate to configure
DNS uses CNAME records pointing to the tunnel
[PUBLIC] label in CLI output

Requires: A Cloudflare-managed domain and an API token with Zone:DNS:Edit + Account:Cloudflare Tunnel:Edit.

Pro mode

Uses your own domain with Cloudflare DNS and Let's Encrypt certificates. Services are LAN-only.

dynamoip sets Cloudflare DNS A records pointing to your LAN IP
Obtains a wildcard certificate via DNS-01 challenge
Every device on the network trusts it out of the box — no setup on other devices
[LAN] label in CLI output

Requires: A Cloudflare-managed domain and an API token with Zone:DNS:Edit.

Quick mode

Uses mDNS .local hostnames — no domain or Cloudflare account required. LAN only.

Works via dns-sd (macOS) or avahi (Linux)
Uses mkcert to generate a locally-trusted certificate
Other devices need the mkcert CA installed once

Requirements

Node.js 18+
macOS or Linux (Windows supported via Docker)
sudo for Pro and Quick modes (to bind ports 80/443) — or pass --port 8443 to avoid it. Max mode needs no sudo.

Install

npm install --save-dev dynamoip
# or
pnpm add -D dynamoip
# or
yarn add -D dynamoip

Minimal config

Pro mode:

{
  "baseDomain": "yourdomain.com",
  "domains": {
    "myapp": 3000
  }
}

Max mode (add one key):

{
  "baseDomain": "yourdomain.com",
  "tunnel": true,
  "domains": {
    "myapp": 3000
  }
}

Quick mode (omit baseDomain):

{
  "domains": {
    "myapp": 3000
  }
}

Run

# Pro / Quick mode (binds ports 80/443)
sudo npm run dev:proxy

# Max mode — no sudo needed
npm run dev:proxy

See Quick Setup for step-by-step instructions.

Documentation