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April, 26th. 2006:
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PAM_SECURETTY
Section: Linux\-PAM Manual (8) Updated: 04/01/2016 Index
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NAME
pam_securetty - Limit root login to special devices
SYNOPSIS
-
pam_securetty.so [debug]
DESCRIPTION
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.
OPTIONS
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.
MODULE TYPES PROVIDED
Only the
auth
module type is provided.
RETURN VALUES
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.
EXAMPLES
-
auth required pam_securetty.so
auth required pam_unix.so
SEE ALSO
securetty(5),
pam.conf(5),
pam.d(5),
pam(8)
AUTHOR
pam_securetty was written by Elliot Lee <sopwith@cuc.edu>.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- MODULE TYPES PROVIDED
-
- RETURN VALUES
-
- EXAMPLES
-
- SEE ALSO
-
- AUTHOR
-
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