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Mobile and Remote Access

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Spencer edited this page May 22, 2026 · 1 revision

Mobile And Remote Access

Coder Studio runs on your machine and is accessed through a browser. Desktop, tablet, and phone use the same service URL, with layouts adapting to screen size.

Choose An Access Method

Scenario Recommended method
Phone and computer are on the same Wi-Fi LAN IP access
Only your own devices need remote access Tailscale
Temporary public URL for a demo or test ngrok
Long-term public URL with your own domain Cloudflare Tunnel

Do not expose an unauthenticated Coder Studio service to the public internet.

LAN Access

Set a password first:

coder-studio config --password <strong-password>

Make the service reachable from other devices on the network:

coder-studio config --host 0.0.0.0
coder-studio serve --restart

Check the port:

coder-studio status

Open this on your phone:

http://<computer-lan-ip>:<port>

Example:

http://192.168.1.23:4173

If it does not open, check that both devices are on the same network, guest isolation is disabled, the firewall allows the port, and the service is not listening only on localhost.

Tailscale

Tailscale is the recommended option for personal remote access. It keeps access inside your private tailnet instead of exposing a public port.

Basic flow:

coder-studio config --password <strong-password>
coder-studio config --host 0.0.0.0
coder-studio serve --restart
tailscale status

Then open:

http://<computer-tailscale-ip>:<port>

For HTTPS, Serve, or Funnel, follow Tailscale's official docs and review the access-control implications before making anything public.

ngrok

ngrok is useful for temporary public access.

coder-studio status
ngrok http <port>

Open the generated HTTPS URL from your phone.

Use ngrok carefully:

  • Set a Coder Studio password first
  • Do not share the generated URL with untrusted people
  • Stop ngrok after the demo or test

Cloudflare Tunnel

Cloudflare Tunnel is useful when you want a longer-lived HTTPS URL, often with a domain you control.

Quick Tunnel example:

cloudflared tunnel --url http://localhost:<port>

For long-term use, create a managed tunnel in Cloudflare Zero Trust and map a hostname such as:

https://coder.example.com -> http://localhost:<port>

For public exposure, pair this with Cloudflare Access or another identity layer.

Security Checklist

  • Set a strong Coder Studio password before LAN or remote access.
  • Prefer Tailscale for personal cross-device access.
  • Do not publish a raw unauthenticated port.
  • Stop temporary tunnels when finished.
  • Avoid opening sensitive projects through public links.

Official References

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