freebsd-skq/share/man/man4/mac_bsdextended.4

.\" Copyright (c) 2002 Networks Associates Technology, Inc.
.\" All rights reserved.
.\" 
.\" This software was developed for the FreeBSD Project by Chris Costello
.\" at Safeport Network Services and Network Associates Laboratories, the
.\" Security Research Division of Network Associates, Inc. under
.\" DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
.\" DARPA CHATS research program.
.\" 
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.\" modification, are permitted provided that the following conditions
.\" are met:
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.\" $FreeBSD$
.Dd OCTOBER 16, 2002
.Os
.Dt MAC_BSDEXTENDED 4
.Sh NAME
.Nm mac_bsdextended
.Nd file system firewall policy
.Sh SYNOPSIS
To compile the file system firewall policy into your kernel,
place the following lines in your kernel configuration file:
.Cd "options MAC"
.Cd "options MAC_BSDEXTENDED"
.Pp
Alternately, to load the file system firewall policy module at boot time,
place the following line in your kernel configuration file:
.Cd "options MAC"
.Pp
and in
.Xr loader.conf 5 :
.Cd mac_bsdextended_load= Ns \&"YES"
.Sh DESCRIPTION
The
.Nm
interface provides an interface for the system administrator
to impose mandatory rules regarding users and some system objects.
Rules are uploaded to the module
(typically using
.Xr ugidfw 8 ,
or some other tool utilizing
.Xr libugidfw 3 )
where they are stored internally
and used to determine whether to allow or deny specific accesses
(see
.Xr ugidfw 8 ) .
.Sh IMPLEMENTATION NOTES
While the traditional
.Xr mac 9
entry points are implemented,
policy labels are not used;
instead, access control decisions are made by iterating through the internal
list of rules until a rule
which denies the particular access
is found,
or the end of the list is reached.
.Sh SEE ALSO
.Xr libugidfw 3 ,
.Xr mac_biba 4 ,
.Xr mac_ifoff 4 ,
.Xr mac_lomac 4 ,
.Xr mac_mls 4 ,
.Xr mac_none 4 ,
.Xr mac_partition 4 ,
.Xr mac_seeotheruids 4 ,
.Xr mac_test 4 ,
.Xr ugidfw 8 ,
.Xr mac 9
.Sh HISTORY
The
.Nm
policy module first appeared in
.Fx 5.0
and was developed by the TrustedBSD Project.
.Sh AUTHORS
This software was contributed to the
.Fx
Project by NAI Labs, the Security Research Division of Network Associates
Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
as part of the DARPA CHATS research program.