11-18-2015
Not every system uses or even allows all possible login "types". If you read the pam manpage or vi pam.conf in the /etc directory tree you can see what your system does. Also note that you can deny interactive ssh sessions on a per user or per group basis - see your sshd.conf file. This affects the types of logins that you will see.
LDAP, for instance, can be set up to employ a remote server or to use the local box as the ldap server. What you may see in the auth logs will be different - at least on Solaris.
edit: As a second thought - please share what are you trying to accomplish ultimately - NOT how you think it should be done.
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LEARN ABOUT FREEBSD
nologin
NOLOGIN(5) BSD File Formats Manual NOLOGIN(5)
NAME
nologin -- disallow logins
DESCRIPTION
Programs such as login(1) disallow logins if the nologin file exists. The programs display the contents of nologin to the user if possible
and interrupt the login sequence. This makes it simple to temporarily prevent incoming logins systemwide.
To disable logins on a per-account basis, investigate nologin(8).
SECURITY
The nologin file is ignored for user root by default.
IMPLEMENTATION NOTES
The nologin feature is implemented through login.conf(5), which allows to change the pathname of the file and to extend the list of users
exempt from temporary login restriction.
PAM-aware programs can be selectively configured to respect nologin using the pam_nologin(8) module via pam.conf(5).
The nologin file will be removed at system boot if it resides in /var/run and cleanvar_enable is set to ``YES'' in rc.conf(5), which is
default. Therefore system reboot can effectively re-enable logins.
FILES
/var/run/nologin default location of nologin
SEE ALSO
login(1), login.conf(5), pam.conf(5), rc.conf(5), nologin(8), pam_nologin(8), shutdown(8)
BSD
May 10, 2007 BSD