Successful logging in without due approval

Hello Bro,
This is My first ques. here.
I have problem which is summeriezed by that, sometimes the users get logged into the service without duo notification on the smart phone which is the second form of authentication on smart phones, Android or Iphone.

what are the cases the the users may get logged into the service without the duo 2FA approval?
Thankx alot

It really depends on which components of Duo you are using and how things are set up. Without that info, difficult to say. However, here are some of the cases where Duo doesn’t prompt:

  1. You have the user in Bypass mode within the Duo Admin panel.
  2. You have a policy where it allows users to log in if Duo can’t be reached.
  3. You have a policy where it allows Trusted Networks to bypass Duo.
  4. You have a policy where it allows non-enrolled users to bypass Duo.
  5. You have Duo RD Gateway but only have remote users logging in via RDG; rest of users are logged in via local RDP, which bypasses the RDG and, thus, not use Duo.

There are definitely more cases but, like I said, we don’t know your layout.

Regards,

John Babbitt

Thank you so much Mr. @BabbittJE, very useful.