Configuring TOTP

To configure TOTP settings:

  1. Specify the following:
    • Display Name: The default name here is TOTP. The name will appear on the registration dialog in Parallels Client in the following sentence, "Install TOTP app on your iOS or Android device". If you change the name, the sentence will contain the name you specify, such as "Install <new-name> app on your iOS or Android device".
    • The User enrollment section allows you to limit user enrollment if needed. You can allow all users to enroll without limitations (the Allow option), allow enrollment until the specified date and time (Allow until), or completely disable enrollment (the Do not allow option). If enrollment is disabled due to expired time frame or because the Do not allow option is selected, a user trying to log in will see an error message saying that enrollment is disabled and advising the user to contact the system administrator. When you restrict or disable enrollment, Google authenticator or other TOTP provider can still be used, but with added security which would not allow further user enrollment. This is a security measure to mitigate users with compromised credentials to enroll in MFA.
    • The Authentication section allows you to configure TOTP tolerance. When using Time-based One-Time Password (TOTP), it is required to have the time synchronized between the RAS Connection Broker and client devices. The synchronization must be performed against a global NTP server (e.g. Using the TOTP tolerance drop-down list, you can select a time difference that should be tolerated while performing authentication. Expand the drop-down list and select one of the predefined values (number of seconds). Note that changing time tolerance should be used with caution as it has security implications since the time validity of a security token can be increased, thus a wider time window for potential misuse.

      Note: When using TOTP providers, it is required to have both Connection Brokers and client devices time synchronized with a global NTP server (e.g. Adding TOTP tolerance increases the one-time password validity, which might have security implications.

    • The Reset User(s) field in the User management section is used to reset the token that a user receives when they log in to Parallels RAS for the first time using the TOTP provider. If you reset a user, they'll have to go through the registration procedure again (for instruction on doing this for Google Authenticator, see Using Google Authenticator in Parallels Client). You can search for specific users, reset all users, or import the list of users from a CSV file.
  2. Click Finish.

Please also note that the TOTP available time is calculated as the default 30 seconds + x amount of seconds in the past + x amount of second in the future.

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