Common configuration for PAM services is located in the /etc/pam.d/system-auth-ac file.

Authentication modules are now also written into additional PAM configuration files: /etc/pam.d/password-auth-ac, etc/pam.d/smartcard-auth-ac and /etc/pam.d/fingerprint-auth-ac.

The PAM module for sshd and other remote services such as ftpd now include the /etc/pam.d/password-auth file in Red Hat Enterprise Linux 6 instead of /etc/pam.d/system-auth.