How do I expose localhost with SSH?

Run: ssh -p 2222 -R 80:localhost:3000 entry.io.vn. This opens a reverse tunnel so your local port 3000 gets a public HTTPS URL. No binary to install — just the ssh client you already have.

Is entry.io.vn a free ngrok alternative?

Yes. entry.io.vn is a non-profit, free tunnel that uses plain SSH instead of a custom client. It also offers TCP/SSH tunnels, a private network (VPN), DDNS and self-hosted remote desktop.

Do I need to install anything?

No. Any OS with an ssh client (built into Windows 10+, macOS and Linux) works. You only add your SSH public key once in the dashboard.

Home › CLI · expose localhost over SSH

CLI · SSH tunnel

Expose localhost with one SSH command

entry.io.vn turns any local port into a public HTTPS URL using a single SSH reverse tunnel — no binary to install, no custom client, no app signup. It's a free, non-profit ngrok alternative built on plain ssh -R.

ssh -p 2222 -R 80:localhost:3000 entry.io.vn

→ Your app on port 3000 instantly gets https://<name>.entry.io.vn. Works on Windows 10+, macOS, Linux (the ssh client is already there).

Quick start

Two steps, then one command

Add your SSH key — sign in at app.entry.io.vn, paste your public key (one-time):
[ -f ~/.ssh/id_ed25519 ] || ssh-keygen -t ed25519 -q -N "" -f ~/.ssh/id_ed25519 cat ~/.ssh/id_ed25519.pub # paste this into Dashboard ▸ SSH Keys
Open the tunnel (change 3000 to your local port):
ssh -p 2222 -R 80:localhost:3000 entry.io.vn

🔗 Keep the SSH session open and the URL stays live. Close it and the tunnel ends — perfect for demos, webhooks and quick sharing.

More tunnels

HTTP · TCP · SSH

Use case	Command
HTTP app → public HTTPS URL	`ssh -p 2222 -R 80:localhost:3000 entry.io.vn`
Fixed subdomain	`ssh -p 2222 -R myapp:80:localhost:3000 entry.io.vn`
Raw TCP port (DB, game server…)	`ssh -p 2222 -R 0:localhost:5432 entry.io.vn`

⚡ Behind CGNAT or a strict firewall? This still works — the tunnel is outbound from your machine, so no port-forwarding is needed.

Why SSH

vs. ngrok & client-based tunnels

	entry.io.vn	Client-based tunnels
Install	Nothing — uses your `ssh`	Download + run a binary/agent
Auth	Your SSH key	Account token in a config file
Cost	Free (non-profit)	Free tier + paid plans
Also offers	VPN · DDNS · remote desktop · MCP for AI agents	Varies

Get started — free → Full docs (Tiếng Việt) →