SSH User Password Wont Work

[StormTheGates]

Hello,

I have a user account which was working fine until two days ago. It was password authenticating without issue.

Now however, I can not get it to authenticate. I have tried changing the password with "passwd", no dice. I know what the password is, and when I set up a new user2 with the same password that user authenticated just fine.

Deleting and remaking the user did not correct the issue, still password failed.

The only thing in my /var/log/secure is that authentication was denied due to incorrect password.

There doesnt seem to be anything awry in /etc/passwd or /etc/shadow. The home directory is owned by the user.

How can I debug this problem?