I think I’ve found a way to get this to work (not 100% yet). In the PAM Examples section for Ubuntu 18.04 on Duo Unix - 2FA for SSH with PAM Support (pam_duo) | Duo Security, if I don’t make the changes in /etc/pam.d/common-auth, I am able to trigge...

Just wondering if you have found a solution for your problem. I’m running Ubuntu 18.04 and I think I have exactly the same problem. After I get duo authentication to work (i.e., I can ssh to my Ubuntu 18.04 system and it will ask for duo authentica...