08-18-2010
Sorry, stupid question, but has the sshd_config got "UsePAM" configured ?
If it hasnt, then configure it, restart sshd and try again.
If it is then you should be able to find out which module is allowing access by debugging the "account" section of your pam.conf.
Make a copy of the pam.conf, and then add " debug" to the end of the "account" lines and make sure you enable auth.debug in your syslog.conf. Then when you logon you should see in the syslog messages from each PAM module.
I hope this helps...
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LEARN ABOUT CENTOS
pam_warn
PAM_WARN(8) Linux-PAM Manual PAM_WARN(8)
NAME
pam_warn - PAM module which logs all PAM items if called
SYNOPSIS
pam_warn.so
DESCRIPTION
pam_warn is a PAM module that logs the service, terminal, user, remote user and remote host to syslog(3). The items are not probed for, but
instead obtained from the standard PAM items. The module always returns PAM_IGNORE, indicating that it does not want to affect the
authentication process.
OPTIONS
This module does not recognise any options.
MODULE TYPES PROVIDED
The auth, account, password and session module types are provided.
RETURN VALUES
PAM_IGNORE
This module always returns PAM_IGNORE.
EXAMPLES
#%PAM-1.0
#
# If we don't have config entries for a service, the
# OTHER entries are used. To be secure, warn and deny
# access to everything.
other auth required pam_warn.so
other auth required pam_deny.so
other account required pam_warn.so
other account required pam_deny.so
other password required pam_warn.so
other password required pam_deny.so
other session required pam_warn.so
other session required pam_deny.so
SEE ALSO
pam.conf(5), pam.d(5), pam(8)
AUTHOR
pam_warn was written by Andrew G. Morgan <morgan@kernel.org>.
Linux-PAM Manual 09/19/2013 PAM_WARN(8)