Suppress weird "authentication failure" log while using pam_ldap with ssh on CentOS 7

Solution 1:

According Red Hat KB article 881103

This is expected behaviour from pam_unix and the message is normal and harmless.

There is no configuration option within pam_unix to stop logging those messages.

The default pam configuration tries to authenticate a user using pam_unix first, then using pam_ldap.so module if authentication with pam_unix is failed.

The article will also show a possible configuration change if you like to remove these default failures errors from logging.

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