[KLUG Members] PAM

[komal]

Hello

I am trying to figure out how PAM works. As a  learning exercise I want to
set user password NULL or zero character. I know it is very bad practice.I
am using fedora core 3.

/etc/pam.d/passwd

#%PAM-1.0
auth       required pam_stack.so service=system-auth
account    required pam_stack.so service=system-auth
password   required pam_stack.so service=system-auth

/etc/pam.d/system-auth

#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth        required      /lib/security/$ISA/pam_env.so
auth        sufficient    /lib/security/$ISA/pam_unix.so likeauth nullok
auth        required      /lib/security/$ISA/pam_deny.so

account     required      /lib/security/$ISA/pam_unix.so
account     sufficient    /lib/security/$ISA/pam_succeed_if.so uid < 100
quiet
account     required      /lib/security/$ISA/pam_permit.so

password    required     /lib/security/$ISA/pam_cracklib.so retry=3
minilen=9
password    sufficient    /lib/security/$ISA/pam_unix.so nullok  use_authtok
md5 shadow
password    required      /lib/security/$ISA/pam_deny.so

session     required      /lib/security/$ISA/pam_limits.so
session     required      /lib/security/$ISA/pam_unix.so

Regards,

Komal