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Dhurta Host

Browser-based Windows remote desktop. Self-hosted, zero infrastructure cost, no paid services.

How it works

Browser  ──WebRTC P2P──▶  Windows PC
   │                           │
   └──── Cloudflare Tunnel ────┘
          (signaling only)

• Host Agent (C# .NET 8) runs on your Windows PC, captures the screen, injects input
• Kestrel listens on 127.0.0.1:8765 only — never exposed directly to the internet
• Cloudflare Tunnel (cloudflared) creates an outbound tunnel to expose the signaling WebSocket
• WebRTC P2P carries the actual screen stream — Cloudflare never sees your screen content
• Web frontend (React + Vite + TypeScript) is hosted on GitHub Pages

Stack

Layer	Technology
Host Agent	C# .NET 8, ASP.NET Core Kestrel, WinForms tray
Screen capture	Windows.Graphics.Capture API, DXGI fallback (Phase 2)
Input injection	Win32 SendInput (Phase 2)
Tunnel	Cloudflare Tunnel (free)
STUN	stun.l.google.com, stun.cloudflare.com (free, no account)
TURN relay	Self-hosted coturn (Phase 2)
Frontend	React 19, Vite 6, TypeScript, Tailwind CSS, Zustand
Auth	Argon2id, JWT HS256, access keys (base32)
Storage	SQLite (WAL mode)

Security

• Auth required before WebSocket opens; JWT validated within 8 s or connection closed
• Argon2id password hashing (64 MB, 3 iterations)
• Rate-limited: 5 failed attempts → 15-min IP lockout
• Typed WebSocket message protocol — no shell execution possible
• CORS restricted to prashantkeshr.github.io + localhost:5173
• Session tokens stored in sessionStorage (cleared on tab close)

See docs/security.md for full details.

Phase status

Phase	Description	Status
1	Auth, signaling, access keys, tray	✅ Complete
2	Screen streaming (WGC + JPEG frames)	Planned
3	WebRTC P2P upgrade	Planned
4	Input forwarding	Planned
5	TURN relay + reconnect	Planned
6	Installer (Inno Setup)	Planned

Quick start

Host Agent

cd host-agent/src/DhurtaHost
dotnet run

The agent starts Kestrel on port 8765, launches a Cloudflare Quick Tunnel, and shows the URL in a tray balloon tip.

Web frontend (dev)

cd web
npm install
npm run dev        # http://localhost:5173

Repository layout

dhurta-host/
├── host-agent/src/DhurtaHost/   # C# .NET 8 host agent
├── web/                         # React + Vite frontend
├── infrastructure/
│   ├── cloudflared/             # Named tunnel config template
│   └── coturn/                  # TURN relay config template
├── docs/
│   ├── security.md
│   ├── setup-windows.md
│   └── cloudflare-setup.md
└── .github/workflows/
    └── deploy-web.yml           # GitHub Pages deploy

License

MIT