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    I'm pretty sure you can have multiple authentication attempts (PAM or otherwise) over a single connection. That's pretty much the point of MaxAuthTries. Commented Jan 21, 2018 at 10:00
  • I'm not disputing that. It's just that once he exceeds the limit in MaxAuthTries, he's not going to be able to connect anymore. The only thing that he can do in that case is to increase MaxAuthTries or reset pam_tally or pam_tally2. The latter makes more sense. Commented Jan 21, 2018 at 14:13