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<samba:parameter name="lanman auth"
context="G"
type="boolean"
function="_lanman_auth"
deprecated="1"
xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
<description>
<para>This parameter has been deprecated since Samba 4.11 and
support for LanMan (as distinct from NTLM, NTLMv2 or
Kerberos authentication)
will be removed in a future Samba release.</para>
<para>That is, in the future, the current default of
<command>lanman auth = no</command>
will be the enforced behaviour.</para>
<para>This parameter determines whether or not <citerefentry><refentrytitle>smbd</refentrytitle>
<manvolnum>8</manvolnum></citerefentry> will attempt to
authenticate users or permit password changes
using the LANMAN password hash. If disabled, only clients which support NT
password hashes (e.g. Windows NT/2000 clients, smbclient, but not
Windows 95/98 or the MS DOS network client) will be able to
connect to the Samba host.</para>
<para>The LANMAN encrypted response is easily broken, due to its
case-insensitive nature, and the choice of algorithm. Servers
without Windows 95/98/ME or MS DOS clients are advised to disable
this option. </para>
<para>When this parameter is set to <value>no</value> this
will also result in sambaLMPassword in Samba's passdb being
blanked after the next password change. As a result of that
lanman clients won't be able to authenticate, even if lanman
auth is re-enabled later on.
</para>
<para>Unlike the <parameter moreinfo="none">encrypt
passwords</parameter> option, this parameter cannot alter client
behaviour, and the LANMAN response will still be sent over the
network. See the <command moreinfo="none">client lanman
auth</command> to disable this for Samba's clients (such as smbclient)</para>
<para>This parameter is overridden by <parameter moreinfo="none">ntlm
auth</parameter>, so unless that it is also set to
<constant>ntlmv1-permitted</constant> or <constant>yes</constant>,
then only NTLMv2 logins will be permitted and no LM hash will be
stored. All modern clients support NTLMv2, and but some older
clients require special configuration to use it.</para>
<para><emphasis>This parameter has no impact on the Samba AD DC,
LM authentication is always disabled and no LM password is ever
stored.</emphasis></para>
</description>
<value type="default">no</value>
</samba:parameter>
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