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To set it up on Windows , download and run the OpenVPN installer.

  • You may be asked if you want to allow the program to make changes to the computer: select "Yes".
  • You will be shown a "Welcome to the setup wizard" screen: click "Next".
  • You will be asked to review the licence agreement: Click "I agree."
  • You will be asked to choose components. Leave all the components ticked and click 'Next'.
  • You will asked to choose a location for OpenVPN. Accept the default and click 'Install'.
  • You may be asked to approve the installation of a TAP adapter. If so, click 'Install'.
  • You will see some messages which should end with the line 'Completed'. Click 'Next'.
  • You will be given the option to show the 'README' file. Click 'Finish'.

To configure OpenVPN to connect to the Chemistry department, you will need to download the configuration file for Windows. (Right-click the link and select 'Save Link as...' and save to the hard disk). Copy the file into the 'config' directory within OpenVPN: if you installed to the default location (c:\Program Files (x86)\OpenVPN), that directory will be c:\Program Files (x86)\OpenVPN\config\


To connect to the department, find the 'OpenVPN GUI' start icon and doubleclick it. An icon of a white computer screen will appear in the system tray. Right click that icon and select 'connect': you will be asked for your Admitto credentials. A window will pop up showing logs as the connection is made. When the VPN is connected, the system tray icon will change to have a green line around the computer screen.

Logging in with saved credentials

If you had rather Windows didn't prompt you for a password every time you want to connect, you can set up OpenVPN in a slightly different way using your ChemNet token. This token can be saved on your computer so you don't have to type it in every time. 

  • Download this config file and this dummy credentials file . Put them both into the OpenVPN config directory. You will need to edit the dummy credentials file - see next bullet point.
  • Edit the credentials file in Notepad or another text editor. Replace the dummy credentials with your username and ChemNet token. You can collect the token from . The username is your CRSID (in lowercase) followed by
  • When you start OpenVPN you should now have the option of using the 'chemistry-win10-token' profile which should connect without having to type in a password. 


There is a set of troubleshooting suggestions at

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