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VPN Installation for GPU Cloud Access – For Windows Users

Korea University's GPU Cloud requires VPN access using the Tailscale client. However, instead of using Tailscale’s public servers, a custom VPN server is used specifically for GPU Cloud. You must configure the login server address accordingly.

This document provides installation instructions for Windows. For macOS users, please refer to the macOS guide For other operating systems, see the Tailscale download page

Tailscale

Installation

다운로드 화면
  • Run the downloaded installation file to complete the setup.

Verify Installation

  • Open PowerShell or Command Prompt, and enter the following command to verify that Tailscale is properly installed:
tailscale version

VPN Login and Connection

Initial Login Setup

  • In PowerShell or Command Prompt, run the following command:
tailscale login --login-server=https://gpuvpn.korea.ac.kr --accept-routes
  • You should see a screen like this:
cli_success
  • Your default browser will automatically open the Microsoft login page. Log in using your Korea University account.
구글로그인 화면1
  • Once the login is successful, you will see a confirmation screen like this: Make sure the URL begins with https://gpuvpn.korea.ac.kr/oidc/. It may take several seconds for the login page to fully load.
tailscale_success

⚠️ (주의) - If you run tailscale up directly without the proper login command, you may see a screen like the one below. This will not allow you to connect to Korea University’s GPU Cloud.

잘못된 로그인 시도 화면

Always run
tailscale login --login-server=https://gpuvpn.korea.ac.kr --accept-routes
to correctly authenticate and connect to the GPU VPN.

Managing VPN Connection

  • tailscale status - View connection status, connected devices, and their IP addresses.
  • tailscale down - Disconnect from the VPN.

If VPN Connection Fails

  • Run tailscale down to disconnect.
  • Re-run the login command:: tailscale login --login-server=https://gpuvpn.korea.ac.kr --accept-routes