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No, NCSA has disabled the SMS authentication method for our Duo deployment due to the security weaknesses of that method. See NIST is No Longer Recommending Two-Factor Authentication Using SMS for references on this topic.
My passcodes aren't working even though I'm pretty sure they should. What can I do?
- Attempt to authenticate with three correct passcodes in five minutes. This process will resynchronize your Duo app or hardware token with your Duo-protected account.
If your passcodes have gotten out of sync with the Duo service, Duo supports the standard resynchronization algorithm which allows a user to provide multiple valid one time passcodes (OTPs) to get the remote server's counter back in sync with the local device. This is a secure method of resynchronization and does not pose a security risk because the OTP seed is not changed. Resynchronization may be needed because server's counter value is only incremented after a successful authentication where as the counter on the device is incremented with every request by the user. Because of this, the counter values on the server and on the token might be out of synchronization.
Where can I get additional help?
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