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Why is the following log produced?

pam_unix(sshd:auth): auth could not identify password for [admin] - sshd[6968] 

Is it because of a timeout, or is there some other reason?

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ADD : One of the pam libraries in the sshd pam config file is making the password to be null and hence pam_unix does not get any password for authentication. Problem solved by editing the custom pam library. – soma sekhar Apr 9 '14 at 16:44

Check your /etc/ssh/sshd_config file. If this user admin is listed as DenyUsers. Comment the particular line and restart the sshd service.

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up vote 0 down vote accepted

One of the pam modules have made the password null and it is passed to the pam_unix. Once I fixed it, it started working fine. Thanks.

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