Why can't I use online resources even VPN connect successfully?

QuestionWhy can't I use online resources even VPN connect successfully?

There are a few reasons that cannot access some kind of database, e-book, or full-text journal when the VPN connect successfully and IP address starts with 140.112.

  1. The VPN server is under maintenance.
  2. The database server is under maintenance.
  3. Maximum of users access the database at the same time. For example, "Digitimes" is limited 5 people using database at the same time.
  4. E-journal may have the embargo situation for the delay to provide full-text access.
  5. The database would request the user to enter the login account, such as "TEJ".
  6. The database does not support VPN off-campus connections. You must access the resources within a specific network area or even use specific computers. For example, users are only allowed to access "Statista" in the Koo Library, the College of Social Sciences.
  7. Adjust the operation order to “Log in to VPN → Enter the database” instead of “Enter the database first → Log in to VPN → Refresh the database”.  The database server may save the original IP address previously, and it may cause the VPN fails.
  8. The database (such as IEEE Xplore) only supports VPN connection via Pulse Secure client, rather than NTU SSL VPN website (https://sslvpn2.ntu.edu.tw). Therefore, you must install Pulse Secure client to connect VPN. Click here to check the installation guide.


If you have those situations, please contact the library for help by phone 02-3366-2326 or email tul@ntu.edu.tw .