Aether

Aether lets you share your terminal instantly across any network. By using direct peer-to-peer connections, it completely bypasses the headache of SSH keys, firewalls, and port forwarding so you can focus on collaborating

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Overview

Aether is a frictionless, peer-to-peer terminal sharing tool. Instantly broadcast a live, interactive terminal session across any network using a simple 6-digit code. Designed for immediate collaboration, Aether entirely eliminates the need for user accounts, SSH key management, or complex firewall configurations.

$ aether share

A E T H E R                                                          
   Secure terminal sharing                                  

  >  Session code:   4 5 2 2 3 7
  >  Share URL:     https://useaether.vercel.app/term/452237
  >  Give this code to anyone you want to share your terminal with.

     Connecting to signaling server...
  ✓  Connected to signaling server
  ✓  Waiting for viewer...

The viewer opens the link, enters the code, and gets a live interactive terminal - streamed directly from your machine over an encrypted peer-to-peer connection. The signaling server never touches your terminal data.

How It Works

Aether uses WebRTC DataChannels to establish direct, peer-to-peer (P2P) connections for terminal streaming. This architecture ensures low latency and high security, as your terminal data never passes through a central server.

┌───────────────────────────────────────┐                                     ┌───────────────────────────────────────┐
│             HOST MACHINE              │                                     │             REMOTE BROWSER            │
│                                       │           1. WebSockets             │                                       │
│ ┌───────────────────────────────────┐ │      (Offer/Answer/ICE Relay)       │ ┌───────────────────────────────────┐ │
│ │         AETHER CLI AGENT          │ │           ┌───────────┐             │ │             WEB VIEWER            │ │
│ │ ┌─────────────┐   ┌─────────────┐ │ │           │ Signaling │             │ │ ┌─────────────┐   ┌─────────────┐ │ │
│ │ │ Session Mgr │   │ ws client   │◄├─┼──────────►│  Server   │◄────────────┼─┤ │ ws client   │   │ React 19 UI │ │ │
│ │ └─────────────┘   └─────────────┘ │ │           │(Express 5)│             │ │ └─────────────┘   └─────────────┘ │ │
│ │ ┌─────────────┐   ┌─────────────┐ │ │           └───────────┘             │ │ ┌─────────────┐   ┌─────────────┐ │ │
│ │ │ @roamhq/wrtc│   │ Env Sanitiz.│ │ │        (Never sees term data)       │ │ │ Native WebRTC │   │ xterm.js 6  │ │ │
│ │ └──────┬──────┘   └──────┬──────┘ │ │                                     │ │ └──────┬──────┘   └──────┬──────┘ │ │
│ └────────┼─────────────────┼────────┘ │                                     │ └────────┼─────────────────┼────────┘ │
│          │                 │          │          2. WebRTC (P2P)            │          │                 │          │
│          │                 ▼          │    Channel: "terminal" (E2EE)       │          │                 │          │
│          │          ┌─────────────┐   │◄═══════════════════════════════════►│          │                 │          │
│          └──────────┤ Local Shell │   │                                     │          └─────────────────┘          │
│ PTY I/O Binding     │ (node-pty)  │   │     Raw PTY Output ───────►         │        Terminal Render & Input        │
│                     └─────────────┘   │     ◄────── Keystrokes & Resizes    │                                       │
└───────────────────────────────────────┘                                     └───────────────────────────────────────┘

Connection flow:

1. Agent spawns a pseudo-terminal (PTY) and registers a 6-digit session code on the signaling server via WebSocket.
2. Viewer enters the code in the web app; the server confirms the session exists.
3. Signaling server relays the WebRTC offer → answer → ICE candidates between both peers.
4. DataChannel opens - terminal I/O flows directly peer-to-peer, end-to-end encrypted.
5. Server steps aside - it no longer participates in the session.

Architecture

Aether is a monorepo structured as three npm workspaces:

Workspace	Role	Key Technologies
agent/	CLI tool that shares your terminal	Node.js,node-pty, @roamhq/wrtc
server/	WebSocket signaling server	Express 5,ws, MongoDB (optional)
web/	Browser-based terminal viewer	React 19, xterm.js 6, Tailwind CSS 4

Data Channel Protocol

Once the P2P connection is established, all communication uses a single reliable ordered DataChannel named "terminal":

Direction	Payload
Agent → Viewer	Raw PTY output (text + ANSI escape sequences)
Viewer → Agent	Raw keystrokes,or { type: "resize", cols, rows } for terminal resize events

Getting Started

Prerequisites

• Node.js ≥ 22 (includes npm ≥ 10)
• Python & C++ build tools (Required bynode-pty native bindings`)
• MongoDB (Optional -server runs without it)

Setting up build tools:

# Windows
npm install --global windows-build-tools

# macOS
xcode-select --install

# Linux
sudo apt install build-essential python3

Installation

# 1. Clone
git clone https://github.com/indrasuthar07/Aether.git
cd Aether

# 2. Install 
npm install

# 3. Configure 
cp .env.example .env

Running Locally

start each workspace individually:

npm run dev:server   # Signaling server 
npm run dev:web      # Web app          
npm run dev:agent    # Agent CLI

Usage

Sharing a Terminal

Run the following on the machine you want to share:

aether share

Aether will:

1. Spawn your default shell (PowerShell on Windows, bash/zsh on macOS/Linux)
2. Register a unique 6-digit session code
3. Print a shareable link
4. Wait for a viewer to connect via WebRTC

Viewing a Terminal

1. Open project URL
2. Click "Open Web Terminal"
3. Enter the 6-digit session code
4. Done - you're in a live, interactive session

CLI Reference

Usage: aether [command]

Commands:
  share        Share your terminal (default command)
  help, -h     Show help information
  version, -v  Print the current version

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Project Structure

Aether/
├── agent/                          # CLI terminal-sharing agent
│   ├── src/
│   │   ├── index.ts                # Entry point & CLI parser
│   │   ├── session.ts              # Session orchestrator (core logic)
│   │   ├── signaling-client.ts     # WebSocket signaling client
│   │   ├── webrtc.ts               # WebRTC peer connection wrapper
│   │   ├── pty.ts                  # PTY spawn + environment sanitization
│   │   ├── config.ts               # Configuration with env overrides
│   │   ├── code.ts                 # 6-digit session code generator
│   │   └── logger.ts               # Colored CLI output
│   └── package.json
│
├── server/                         # WebSocket signaling server
│   ├── src/
│   │   ├── index.ts                # Express + WebSocket server setup
│   │   ├── signaling.ts            # Message handling & relay logic
│   │   ├── room.ts                 # Room lifecycle & management
│   │   ├── connection-manager.ts   # Per-IP & global connection limits
│   │   ├── rate-limiter.ts         # Sliding-window rate limiting
│   │   ├── validation.ts           # Payload whitelisting & size gates
│   │   ├── config.ts               # Server configuration
│   │   ├── logger.ts               # Structured JSON logging
│   │   ├── db.ts                   # MongoDB connection (optional)
│   │   ├── models/Session.ts       # Session schema (scaffolded)
│   │   └── routes/health.ts        # GET /health endpoint
│   └── package.json
│
├── web/                            # Browser-based terminal viewer
│   ├── src/
│   │   ├── App.tsx                 # Router & layout
│   │   ├── main.tsx                # React entry point
│   │   ├── types.ts                # Shared types & constants
│   │   ├── index.css               # Tailwind theme + xterm overrides
│   │   ├── pages/
│   │   │   ├── Home.tsx            # Landing page
│   │   │   ├── ConnectTerminal.tsx # Session code entry
│   │   │   ├── TerminalPage.tsx    # Live terminal session
│   │   │   └── NotFound.tsx        # 404 page
│   │   ├── components/
│   │   │   ├── Nav.tsx             # Floating navigation bar
│   │   │   ├── Footer.tsx          # Page footer
│   │   │   ├── CodeInput.tsx       # 6-digit OTP-style input
│   │   │   ├── StatusBar.tsx       # Terminal session status bar
│   │   │   ├── TerminalMockup.tsx  # Decorative terminal (landing)
│   │   │   └── TerminalView.tsx    # xterm.js wrapper component
│   │   └── hooks/
│   │       ├── useSignaling.tsx    # WebSocket signaling hook
│   │       ├── useWebRTC.tsx       # WebRTC peer connection hook
│   │       └── useTerminal.tsx     # xterm.js lifecycle hook
│   └── package.json
│
├── .env.example                    # Environment variable template
├── package.json                    # Root workspace config
└── tsconfig.base.json              # Shared TypeScript configuration

Security

Security is a first-class concern in Aether, not an afterthought.

End-to-End Encryption

All terminal data is transmitted over WebRTC DataChannels, which mandate DTLS encryption - the same protocol underpinning HTTPS. The signaling server is architecturally incapable of reading terminal content; it only relays connection metadata during the handshake.

Environment Sanitization

The agent scrubs 50+ patterns of sensitive environment variables before spawning the PTY shell. Cleared patterns include:

AWS_* · AZURE_* · GCP_* · GITHUB_* · STRIPE_* · OPENAI_* · *_API_KEY · *_TOKEN · *_SECRET · *_PASSWORD · *_DATABASE_URL · and more

Aether's own configuration variables are also excluded from the PTY environment.

Server-Side Hardening

Control	Details
Origin validation	Browser clients must matchALLOWED_ORIGINS; CLI agents are exempt (no Origin header)
Rate limiting	Sliding-window per-IP limits - connections: 20/min, registrations: 5/min, joins: 15/min
Connection caps	Per-IP: 10 · Global: 500
Payload validation	Whitelist-based key filtering with per-type size gates (offer/answer: 32 KB · ICE: 4 KB)
Message size limit	DataChannel messages capped at 4,096 bytes
Room TTL	Rooms auto-expire after 5 minutes of inactivity

Session Isolation

• Each session has a unique 6-digit code (guessing is rate-limited)
• Only one viewer may connect per session at a time
• Agent disconnect immediately tears down the room and evicts any active viewer

---

Tech Stack

• Agent:Node.js 22+, node-pty (terminal spawning), @roamhq/wrtc (WebRTC), ws (WebSockets), nanoid.
• Server:Express 5, ws (WebSockets), Mongoose .
• Web:React 19, Vite 8, xterm.js 6 (browser terminal), Tailwind CSS 4, React Router 7, Lucide React.
• Shared:TypeScript 5, WebRTC (P2P transport).

Contributing

Contributions are welcome. Here's how to get involved:

1. Fork the repository
2. Create a feature branch : git checkout -b feature/my-feature
3. Commit your changes : git commit -m "feat: describe what you did"
4. Push and open a Pull Request

Development Notes

• The monorepo uses npm workspaces - always run npm install from the root
• npm run dev starts the server and web app together via concurrently
• The agent must be started separately with npm run dev:agent
• TypeScript strict mode is enabled across all three workspaces
• Commits follow Conventional Commits - feat:, fix:, chore:, docs:, etc.

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Built with care for terminals everywhere.

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