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pam_nologin(8) [netbsd man page]

PAM_NOLOGIN(8)						    BSD System Manager's Manual 					    PAM_NOLOGIN(8)

pam_nologin -- NoLogin PAM module SYNOPSIS
[service-name] module-type control-flag pam_nologin [options] DESCRIPTION
The NoLogin authentication service module for PAM provides functionality for only one PAM category: authentication. In terms of the module-type parameter, this is the ``auth'' feature. It also provides a null function for session management. NoLogin Authentication Module The NoLogin authentication component (pam_sm_authenticate()), always returns success for the superuser, and returns success for all other users if the file /etc/nologin does not exist. If /etc/nologin does exist, then its contents are echoed to non-superusers before failure is returned. If a "nologin" capability is specified in login.conf(5), then the file thus specified is used instead. This usually defaults to /etc/nologin. The following options may be passed to the authentication module: debug syslog(3) debugging information at LOG_DEBUG level. no_warn suppress warning messages to the user. These messages include reasons why the user's authentication attempt was declined. SEE ALSO
syslog(3), login.conf(5), pam.conf(5), nologin(8), pam(8) BSD
July 8, 2001 BSD

Check Out this Related Man Page

PAM_NOLOGIN(8)							 Linux-PAM Manual						    PAM_NOLOGIN(8)

pam_nologin - Prevent non-root users from login SYNOPSIS [file=/path/nologin] [successok] DESCRIPTION
pam_nologin is a PAM module that prevents users from logging into the system when /var/run/nologin or /etc/nologin exists. The contents of the file are displayed to the user. The pam_nologin module has no effect on the root user's ability to log in. OPTIONS
file=/path/nologin Use this file instead the default /var/run/nologin or /etc/nologin. successok Return PAM_SUCCESS if no file exists, the default is PAM_IGNORE. MODULE TYPES PROVIDED
The auth and acct module types are provided. RETURN VALUES
PAM_AUTH_ERR The user is not root and /etc/nologin exists, so the user is not permitted to log in. PAM_BUF_ERR Memory buffer error. PAM_IGNORE This is the default return value. PAM_SUCCESS Success: either the user is root or the nologin file does not exist. PAM_USER_UNKNOWN User not known to the underlying authentication module. EXAMPLES
The suggested usage for /etc/pam.d/login is: auth required NOTES
In order to make this module effective, all login methods should be secured by it. It should be used as a required method listed before any sufficient methods in order to get standard Unix nologin semantics. Note, the use of successok module argument causes the module to return PAM_SUCCESS and as such would break such a configuration - failing sufficient modules would lead to a successful login because the nologin module succeeded. SEE ALSO
nologin(5), pam.conf(5), pam.d(5), pam(7) AUTHOR
pam_nologin was written by Michael K. Johnson <>. Linux-PAM Manual 09/19/2013 PAM_NOLOGIN(8)
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