Students - Authenticating with Duo 2FA

This article covers how students can authenticate with Duo two-factor authentication when prompted by the campus portal and other applications that require portal login.

1. Enter your campus username and password when prompted. Then click Login.

Remember that you will be prompted to authenticate with Duo when accessing the campus portal (or application that requires portal login) for each web browser on each device. For example, if you are on a laptop and access the portal with Mozilla Firefox and then access the portal with Google Chrome, you will have to authenticate with Duo for each login.

portal username and password

2. You will be prompted to authenticate using your default device in Duo. Choose how you want to authenticate.

The authentication options available will depend on the type of device and whether you have the Duo Mobile app installed.

Duo authentication prompt
  1. Choose the authentication method you want to use. You can choose whichever method works best for you right now; you do not have to receive a push notification just because you have Duo Mobile set up, for example.
  2. Need to choose a different device? Click on the drop-down menu to select another device that you have added to Duo.
  3. Whichever method you choose, remember to check the Remember me for 5 days so you do not need to log in to Duo again on this browser for 5 days.

How do you want to authenticate?

Follow the instructions below to authenticate with a push notification from the Duo Mobile app.

You must have the Duo Mobile app already set up with your Duo account. View instructions on setting up Duo Mobile.

1. Click Send Me a Push.
choose push notification
2. Tap on the push notification on your device.

Missed the push notification? Just open the Duo Mobile app and select the login request.

iPhone push notification
3. Tap the Approve button to authenticate and you're done! Your login should complete on the web browser automatically.
approve login request
Need More Help?

Contact the Student IT Help Desk at StudentITHelpDesk@fullerton.edu or 657-278-8888.

Follow the instructions below to authenticate with Duo by phone call.

1. Click Call Me.
choose call me option
2. You will receive a phone call with instructions on how to authenticate. Usually this involves pressing a number on your phone's dial pad (e.g., press 1 to authenticate).

You should see a phone number displayed when Duo calls you, but it will likely be a phone number you do not recognize. Be sure to answer it!

3. You're done! Your login should complete on the web browser automatically.
Need More Help?

Contact the Student IT Help Desk at StudentITHelpDesk@fullerton.edu or 657-278-8888.

How do you want to get a passcode?

Follow the instructions below to get a text message with a passcode.

1. Click Enter a Passcode.
choose enter passcode option
2. Click Text me new codes.

Don't click Text me new codes more than once! If you do, Duo will send you multiple passcodes and only the last one will be valid.

choose text me codes
3. You will receive a text message from Duo with a passcode.

Be patient! Depending on your cell phone provider, it may take a minute or two to receive the text message.

text message with passcode
4. Enter the passcode in the web browser and click Log In. You're done! Your login should complete on the web browser automatically.
enter passcode and log in
Need More Help?

Contact the Student IT Help Desk at StudentITHelpDesk@fullerton.edu or 657-278-8888.

Follow the instructions below to get a passcode from the Duo Mobile app.

You must have the Duo Mobile app already set up with your Duo account. View instructions on setting up Duo Mobile.

1. Click Enter a Passcode.
choose enter passcode option
2. Open the Duo Mobile app on your phone or tablet. Tap on the CSU Fullerton entry to show a passcode.
Duo Mobile CSU Fullerton option
3. Passcodes expire every few minutes, so be sure to type this passcode into the web browser quickly.
Duo Mobile app with passcode

If the passcode expires, click the icon with two arrows to generate a new one.

4. Enter the passcode in the web browser and click Log In. You're done! Your login should complete on the web browser automatically.
enter passcode and log in
Need More Help?

Contact the Student IT Help Desk at StudentITHelpDesk@fullerton.edu or 657-278-8888.

Follow the instructions below to generate a passcode if you have a hardware token issued by the Student IT Help Desk.

Tokens must be issued by the Student IT Help Desk so they are set up to work with the CSUF Duo system. Contact the Student IT Help Desk at StudentITHelpDesk@fullerton.edu or 657-278-8888 for more information.

1. Be sure to choose Token as the device type. Then click Enter a Passcode.
token passcode
2. Press the button on your token to generate a passcode.
hardware token with passcode showing
3. Enter the passcode in your web browser and click Log In. You're done! Your login should complete on the web browser automatically.

Notice you do not need to include any spaces between the numbers.

enter token passcode and log in
Need More Help?

Contact the Student IT Help Desk at StudentITHelpDesk@fullerton.edu or 657-278-8888.

Congratulations, you are done!