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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.gz fetched from
⟨http://www.linux-pam.org/library/⟩ on 2017-07-05. 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)