I use raspbian on a pi as a simple method to demo Duo. My (documented)config has worked fine over several versions of the stretch based version, but a recent move to buster has seen duo break. I’ve tested a fresh build and config on stretch (no issue), but I was wondering if anyone could shed some light on the following error in /var/log/auth.log:
Aug 4 15:10:14 pihost sshd: pam_duo(sshd:auth): conversation failed
Aug 4 15:10:14 pihost sshd: Aborted Duo login for ‘username’ from 10.1.1.1: Error gathering user response
Aug 4 15:10:16 pihost sshd: Failed password for username from 10.1.1.1 port 63820 ssh2
I’m using simple username/password. Config as per Duo Unix - 2FA for SSH with PAM Support (pam_duo) | Duo Security is correct (which is the basis of my documented config), and secrets/keys/url’s all work on stretch when the pi has the same ip address as the buster version of raspbian (so no firewall/DNS issues).
Thanks in advance