1 <samba:parameter name="lanman auth"
4 advanced="1" developer="1"
5 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
7 <para>This parameter determines whether or not <citerefentry><refentrytitle>smbd</refentrytitle>
8 <manvolnum>8</manvolnum></citerefentry> will attempt to
9 authenticate users or permit password changes
10 using the LANMAN password hash. If disabled, only clients which support NT
11 password hashes (e.g. Windows NT/2000 clients, smbclient, but not
12 Windows 95/98 or the MS DOS network client) will be able to
13 connect to the Samba host.</para>
15 <para>The LANMAN encrypted response is easily broken, due to its
16 case-insensitive nature, and the choice of algorithm. Servers
17 without Windows 95/98/ME or MS DOS clients are advised to disable
20 <para>When this parameter is set to <value>no</value> this
21 will also result in sambaLMPassword in Samba's passdb being
22 blanked after the next password change. As a result of that
23 lanman clients won't be able to authenticate, even if lanman
24 auth is reenabled later on.
27 <para>Unlike the <command moreinfo="none">encrypt
28 passwords</command> option, this parameter cannot alter client
29 behaviour, and the LANMAN response will still be sent over the
30 network. See the <command moreinfo="none">client lanman
31 auth</command> to disable this for Samba's clients (such as smbclient)</para>
33 <para>If this option, and <command moreinfo="none">ntlm
34 auth</command> are both disabled, then only NTLMv2 logins will be
35 permited. Not all clients support NTLMv2, and most will require
36 special configuration to use it.</para>
39 <value type="default">no</value>