PAM_SECURETTY

Section: Linux\-PAM Manual (8)
Updated: 03/02/2009
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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 FC/etc/securettyF[]. pam_securetty also checks to make sure that FC/etc/securettyF[] 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

debug

: Print debug information.

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 FC/etc/securettyF[] 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 FC/etc/securettyF[].

PAM_USER_UNKNOWN

: The module could not find the user name in the FC/etc/passwdF[] 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

AUTHOR

pam_securetty was written by Elliot Lee <sopwith@cuc.edu>.

This document was created by man2html, using the manual pages.
Time: 05:34:28 GMT, December 24, 2015