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path: root/docs/smbdotconf/security/securitymask.xml
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<samba:parameter name="security mask"
                 context="S"
				 type="string"
                 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
<description>
    <para>
	This parameter controls what UNIX permission bits can be modified when a Windows NT client is manipulating the
	UNIX permission on a file using the native NT security dialog box.
	</para>

    <para>
	This parameter is applied as a mask (AND'ed with) to the changed permission bits, thus preventing any bits not
	in this mask from being modified.  Make sure not to mix up this parameter with <smbconfoption name="force
	security mode"/>, which works in a manner similar to this one but uses a logical OR instead of an AND. 
	</para>

	<para>
	Essentially, zero bits in this mask may be treated as a set of bits the user is not allowed to change.
	</para>

    <para>
	If not set explicitly this parameter is 0777, allowing a user to modify all the user/group/world permissions on a file.
    </para>

    <para><emphasis>
	Note</emphasis> that users who can access the Samba server through other means can easily bypass this 
    restriction, so it is primarily useful for standalone &quot;appliance&quot; systems.  Administrators of
	most normal systems will probably want to leave it set to <constant>0777</constant>.
	</para>
</description>

<related>force directory security mode</related>
<related>directory security mask</related>
<related>force security mode</related>

<value type="default">0777</value>
<value type="example">0770</value>
</samba:parameter>