Information Technology Services Centre

Services

Re-registration for 2FA Service

Available to:

Staff, Students

How to register/re-activate:

1. Access to the Two-Factor Authentication (2FA) Retreve User ByPass Code site (https://2fa.ln.edu.hk/rbc.php).

2. Enter your Lingnan username and password, check "I'm not a robot" click "Login" obtain your ByPass Code.

ByPass Code

3. The ByPass code has been sent to your personal email, obtain your ByPass Code in your registered personal email address.

(ByPass code is valid for 1 hour. To prevent denial-of-service DoS attack, once you Retrieve a ByPass code you cannot repeat the retrieve ByPass code action within 5 Minutes.)

ByPass Code2

4. Click "Dismiss" button to go back to the 2FA registration page (https://2fa.ln.edu.hk) and log in using your Lingnan username and password.

.2FA registration login

5. Wait until the DUO mobile login screen appeared and click "Enter a Passcode"

Select Enter a Passcode

6. Enter the Passcode and click "Log in".

Login with Passcode

7. Click the "Device Options" besides the reigster device and then click "Active Duo Mobile"

Reactivate Device

8. Follow the on-screen instruction to select your type of device and its operating system, same as step 4 and onwards from the following web manual:

Register for 2FA Service

User Guides: