freebsd-dev/etc/pam.conf

# Configuration file for Pluggable Authentication Modules (PAM).
#
# This file controls the authentication methods that login and other
# utilities use.  See pam(8) for a description of its format.
#
# Note: the final entry must say "required" -- otherwise, things don't
# work quite right.  If you delete the final entry, be sure to change
# "sufficient" to "required" in the entry before it.
#
# $FreeBSD$

# If the user can authenticate with S/Key, that's sufficient; allow clear
# password. Try kerberos, then try plain unix password.
login	auth	sufficient	pam_skey.so
login	auth	requisite	pam_cleartext_pass_ok.so
#login	auth	sufficient	pam_kerberosIV.so		try_first_pass
login	auth	required	pam_unix.so			try_first_pass

# Same requirement for ftpd as login
ftpd	auth	sufficient	pam_skey.so
ftpd	auth	requisite	pam_cleartext_pass_ok.so
#ftpd	auth	sufficient	pam_kerberosIV.so		try_first_pass
ftpd	auth	required	pam_unix.so			try_first_pass

# OpenSSH with PAM support requires similar modules.  The session one is
# a bit strange, though...
sshd	auth	sufficient	pam_skey.so
sshd	auth	required	pam_unix.so			try_first_pass
sshd	session	required	pam_permit.so

# Don't break startx
xserver	auth	required	pam_permit.so

# XDM is difficult; it fails or moans unless there are modules for each
# of the four management groups; auth, account, session and password.
xdm	auth	required	pam_unix.so
#xdm	auth	sufficient	pam_kerberosIV.so		try_first_pass
xdm	account	required	pam_unix.so			try_first_pass
xdm	session	required	pam_deny.so
xdm	password required	pam_deny.so

# Mail services
imap	auth	required	pam_unix.so			try_first_pass
pop3	auth	required	pam_unix.so			try_first_pass

# If we don't match anything else, default to using getpwnam().
other	auth	required	pam_unix.so			try_first_pass
other	account	required	pam_unix.so			try_first_pass