pam_securetty8Linux-PAM Manualpam_securettyLimit root login to special devicespam_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.
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
Print debug information.
MODULE TYPES PROVIDED
Only the module type is provided.
RETURN VALUESPAM_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 ALSOsecuretty5,
pam.conf5,
pam.d5,
pam8AUTHOR
pam_securetty was written by Elliot Lee <sopwith@cuc.edu>.