Linux 2.6 - man page for pam_securetty (linux section 8)
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PAM_SECURETTY(8) Linux-PAM Manual PAM_SECURETTY(8)
pam_securetty - Limit root login to special devices
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.
Print debug information.
MODULE TYPES PROVIDED
Only the auth module type is provided.
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.
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.
An application error occurred. pam_securetty was not able to get information it
required from the application that called it.
An error occurred while the module was determining the user's name or tty, or the
module could not open /etc/securetty.
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(7)
pam_securetty was written by Elliot Lee <email@example.com>.
Linux-PAM Manual 06/04/2011 PAM_SECURETTY(8)
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