PAM_NOLOGIN





PAM_NOLOGIN


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 /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 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.

SEE ALSO
nologin
(5), pam.conf(5), pam.d(5), pam(8)

AUTHOR
pam_nologin was written by Michael K. Johnson <johnsonm@redhat.com>.



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