|
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | MODULE TYPES PROVIDED | RETURN VALUES | EXAMPLES | SEE ALSO | AUTHOR | COLOPHON |
|
|
|
PAM_SECURETTY(8) Linux-PAM Manual PAM_SECURETTY(8)
pam_securetty - Limit root login to special devices
pam_securetty.so [debug]
pam_securetty is a PAM module that allows root logins only if the
user is logging in on a "secure" tty, as defined by the listing
in /etc/securetty. pam_securetty also checks to make sure that
/etc/securetty is a plain file and not world writable. It will
also allow root logins on the tty specified with console= switch
on the kernel command line and on ttys from the
/sys/class/tty/console/active.
This module has no effect on non-root users and requires that the
application fills in the PAM_TTY item correctly.
For canonical usage, should be listed as a required
authentication method before any sufficient authentication
methods.
debug
Print debug information.
noconsole
Do not automatically allow root logins on the kernel console
device, as specified on the kernel command line or by the sys
file, if it is not also specified in the /etc/securetty file.
Only the auth module type is provided.
PAM_SUCCESS
The user is allowed to continue authentication. Either the
user is not root, or the root user is trying to log in on an
acceptable device.
PAM_AUTH_ERR
Authentication is rejected. Either root is attempting to log
in via an unacceptable device, or the /etc/securetty file is
world writable or not a normal file.
PAM_INCOMPLETE
An application error occurred. pam_securetty was not able to
get information it required from the application that called
it.
PAM_SERVICE_ERR
An error occurred while the module was determining the user's
name or tty, or the module could not open /etc/securetty.
PAM_USER_UNKNOWN
The module could not find the user name in the /etc/passwd
file to verify whether the user had a UID of 0. Therefore,
the results of running this module are ignored.
auth required pam_securetty.so
auth required pam_unix.so
securetty(5), pam.conf(5), pam.d(5), pam(8)
pam_securetty was written by Elliot Lee <sopwith@cuc.edu>.
This page is part of the linux-pam (Pluggable Authentication
Modules for Linux) project. Information about the project can be
found at ⟨http://www.linux-pam.org/⟩. If you have a bug report
for this manual page, see ⟨//www.linux-pam.org/⟩. This page was
obtained from the tarball Linux-PAM-1.3.0.tar.bz2 fetched from
⟨http://www.linux-pam.org/library/⟩ on 2020-12-18. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
Linux-PAM Manual 04/01/2016 PAM_SECURETTY(8)
Pages that refer to this page: securetty(5)
|
HTML rendering created 2020-12-21 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|