The pam_cracklib module checks the strength of passwords. It performs checks such as making sure a password is not a dictionary word, it is a certain length, contains a mix of characters (e.g. alphabet, numeric, other) and more. The following are definitions of the pam_cracklib.so options. * retry=3 - Allow 3 tries before sending back a failure. * minlen=14 - password must be 14 characters or more * dcredit=-1 - provide at least one digit * ucredit=-1 - provide at least one uppercase character * ocredit=-1 - provide at least one special character * lcredit=-1 - provide at least one lowercase character The setting shown above is one possible policy. Alter these values to conform to your own organization's password policies.