Проект OpenNet: MAN pam_nologin (8) Команды системного администрирования (FreeBSD и Linux)

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pam_nologin (8)

pam_nologin (8) ( FreeBSD man: Команды системного администрирования )

>> pam_nologin (8) ( Linux man: Команды системного администрирования )

NAME

pam_nologin - Prevent non-root users from login

SYNOPSIS

pam_nologin.so [file=/path/nologin] [successok]

DESCRIPTION

pam_nologin is a PAM module that prevents users from logging into the system when /etc/nologin exists. The contents of the /etc/nologin 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 /etc/nologin.
successok: Return PAM_SUCCESS if no file exists, the default is PAM_IGNORE.

MODULE SERVICES PROVIDED

The auth and acct services are supported.

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 /etc/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  pam_nologin.so

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.