table of contents
PAM_SECURETTY(8) | Linux-PAM Manual | PAM_SECURETTY(8) |
NAME¶
pam_securetty - Limit root login to special devicesSYNOPSIS¶
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. 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¶
debugPrint debug information.
MODULE TYPES PROVIDED¶
Only the auth module type is provided.RETURN VALUES¶
PAM_SUCCESSThe 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¶
AUTHOR¶
pam_securetty was written by Elliot Lee <sopwith@cuc.edu>.06/04/2011 | Linux-PAM Manual |