dshn — DeepSeek Harness Network

Expose a locally-running DeepSeek Harness (dsh) web UI to the public internet under a *.ds.hn subdomain, gated by a login. Install the plugin, open dsh locally, and a form in Settings asks for a subdomain prefix and a password — those two are the credential. No tokens, no env vars, no provisioning. An optional end-to-end password encrypts the traffic so even the relay operator sees only ciphertext.

⚠️ dsh ships bash and filesystem tools. A publicly reachable dsh UI is a remote shell. The relay's login gate is not optional; do not disable it. Use a strong password, and prefer end-to-end encryption for anything sensitive.

Features

• Zero-config credential. (subdomain, password) set once in dsh's Settings → the plugin claims the subdomain and connects. Persists to dsh's own ~/.dsh/settings.yaml and reconnects on restart.
• Trust-on-first-use claim. The first agent to present a free subdomain sets its password (scrypt-hashed on the relay). Later connects and every browser login must match it — squatting-protected.
• Multi-device. Several machines can bind ONE subdomain with the same credential — each shows up as a named device. With ≥2 online, opening the URL offers a device picker, and a switcher appears in the page's sidebar footer; the choice sticks per browser (a routing cookie), and switching is a clean reload against the other machine. One device online behaves exactly as before.
• Optional end-to-end encryption (off by default). A separate e2e password, never sent to the relay, encrypts /api bodies and the event stream: PBKDF2-SHA256 (210k) → AES-256-GCM. Visitors enter it once in the browser; it can be remembered per-device in localStorage (never transmitted).
• Native UI. Config lives in dsh's own Settings ("公网转发" / Public forwarding); a footer row shows live latency and links to it.
• Self-hosted data plane. Traffic rides Cloudflare's edge to your server — no per-user Cloudflare account, no NS delegation.

Architecture

browser  alice.ds.hn
  │  HTTPS
  ▼
Cloudflare edge  (*.ds.hn proxied / orange-cloud)     free DDoS, WAF, TLS,
  │  origin pull                                        anycast, hidden origin
  ▼
relay  (your server, @dshn/relay)                      login gate + subdomain
  │  one WSS per device (multiplexed)                   claim store; moves bytes
  ▼
dshn  (the dsh plugin, on the user's machine)    replays HTTP + WS to dsh,
  │  http://127.0.0.1:<dsh port>                        Host/Origin rewritten to loopback
  ▼
dsh  (local web server)                                fence sees a loopback request

• No trustedHosts patch. The agent rewrites each forwarded request's Host/Origin to loopback, so dsh's /api browser-trust fence accepts it as a local same-origin request for any runtime-chosen subdomain — which is what lets the subdomain come from a form instead of the composition. Access is gated by the relay login, not the fence.
• End-to-end mode seals request/response bodies at the agent and opens them in the browser; the relay stays a blind byte-mover. The app shell and plugin bundles are left in the clear so the browser can bootstrap and show the unlock gate. It defeats a passive/curious relay and a data-at-rest breach — not an actively malicious relay that tampers with the served JS.

Packages

The claim store (packages/relay/src/claims.ts) is trust-on-first-use for now; an account-backed control plane replaces it later.

Install the agent (user's machine)

From npm (recommended — one command, fully self-contained):

dsh plugin --profile web add @dshn/agent
dsh --profile web

Or a prebuilt tarball from the latest GitHub release:

curl -L -o dshn.tgz \
  https://github.com/jsdvjx/dshn/releases/latest/download/dshn.tgz
dsh plugin --profile web add ./dshn.tgz

Or build from source:

pnpm install && node scripts/build-dist.mjs
dsh plugin --profile web add ./dist/dshn
dsh --profile web

Then open dsh locally, go to Settings → 公网转发 (Public forwarding), pick a subdomain prefix and a password (optionally an end-to-end password), and click Connect. Use the same access password to log in from a phone. Run at most one agent per subdomain — two agents with the same credential fight over it.

Agent environment (all optional; sensible defaults):

Self-host your own network

You don't have to use ds.hn — run the whole thing on your own domain. The relay ships as @dshn/relay (npm) and a Docker image; point your agents at it in the setup form (pick 自托管 / Self-hosted and paste the relay URL) or with DSHN_RELAY_HOST. Full guide, including DNS + TLS options: SELF-HOSTING.md.

# your server — the only thing you set is your apex; the cookie secret is
# auto-generated and persisted, claims + secret live in --data-dir
npx @dshn/relay --apex tunnel.example.com --data-dir /var/lib/dshn
# your dsh — or just set it in Settings → 公网转发 → 自托管
DSHN_RELAY_HOST=wss://tunnel.example.com dsh --profile web

Or from source:

pnpm install && pnpm build
DSHN_COOKIE_SECRET=$(openssl rand -hex 32) \
DSHN_APEX=ds.hn \
DSHN_RELAY_PORT=8787 \
DSHN_CLAIMS=./claims.json \
DSHN_TLS_CERT=./cert.pem DSHN_TLS_KEY=./key.pem \
  node packages/relay/lib/index.js

Cloudflare: proxy *.ds.hn (orange cloud) to the relay's origin. Harden the origin to accept only Cloudflare — firewall to the Cloudflare IP ranges and enable Authenticated Origin Pulls (mTLS). Because Cloudflare closes a proxied WebSocket after ~100s idle, both ends heartbeat every 25s — already built in. For a direct (off-Cloudflare) tunnel that survives sustained heavy throughput, add a grey-cloud (DNS-only) origin.ds.hn A record and point agents at it with DSHN_RELAY_HOST + DSHN_ORIGIN_CA.

Status

Working end-to-end. Known gaps: an occasional tunnel-socket drop fails that connection's in-flight requests (no request replay yet); Cloudflare can reset the tunnel under sustained heavy throughput (use the direct-origin option); the CF free-plan 100 MB request cap can clip large dsh image uploads; the claim store is trust-on-first-use with no account layer; and the relay origin should be locked to Cloudflare IPs + Authenticated Origin Pulls in production.

License

MIT