1 <samba:parameter name="security"
5 enumlist="enum_security"
6 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
7 <when_value value="security">
8 <requires option="encrypt passwords">/(yes|true)/</requires>
11 <para>This option affects how clients respond to
12 Samba and is one of the most important settings in the <filename moreinfo="none">
13 smb.conf</filename> file.</para>
15 <para>Unless <smbconfoption name="server role"/> is specified,
16 the default is <command moreinfo="none">security = user</command>, as this is
17 the most common setting, used for a standalone file server or a DC.</para>
19 <para>The alternatives to <command moreinfo="none">security = user</command> are
20 <command moreinfo="none">security = ads</command> or <command moreinfo="none">security = domain
21 </command>, which support joining Samba to a Windows domain</para>
23 <para>You should use <command moreinfo="none">security = user</command> and
24 <smbconfoption name="map to guest"/> if you
25 want to mainly setup shares without a password (guest shares). This
26 is commonly used for a shared printer server. </para>
28 <para>The different settings will now be explained.</para>
31 <para><anchor id="SECURITYEQUALSAUTO"/><emphasis>SECURITY = AUTO</emphasis></para>
33 <para>This is the default security setting in Samba, and causes Samba to consult
34 the <smbconfoption name="server role"/> parameter (if set) to determine the security mode.</para>
36 <para><anchor id="SECURITYEQUALSUSER"/><emphasis>SECURITY = USER</emphasis></para>
38 <para>If <smbconfoption name="server role"/> is not specified, this is the default security setting in Samba.
39 With user-level security a client must first "log-on" with a
40 valid username and password (which can be mapped using the <smbconfoption name="username map"/>
41 parameter). Encrypted passwords (see the <smbconfoption name="encrypt passwords"/> parameter) can also
42 be used in this security mode. Parameters such as <smbconfoption name="force user"/> and <smbconfoption
43 name="guest only"/> if set are then applied and
44 may change the UNIX user to use on this connection, but only after
45 the user has been successfully authenticated.</para>
47 <para><emphasis>Note</emphasis> that the name of the resource being
48 requested is <emphasis>not</emphasis> sent to the server until after
49 the server has successfully authenticated the client. This is why
50 guest shares don't work in user level security without allowing
51 the server to automatically map unknown users into the <smbconfoption name="guest account"/>.
52 See the <smbconfoption name="map to guest"/> parameter for details on doing this.</para>
54 <para><anchor id="SECURITYEQUALSDOMAIN"/><emphasis>SECURITY = DOMAIN</emphasis></para>
56 <para>This mode will only work correctly if <citerefentry><refentrytitle>net</refentrytitle>
57 <manvolnum>8</manvolnum></citerefentry> has been used to add this
58 machine into a Windows NT Domain. It expects the <smbconfoption name="encrypt passwords"/>
59 parameter to be set to <constant>yes</constant>. In this
60 mode Samba will try to validate the username/password by passing
61 it to a Windows NT Primary or Backup Domain Controller, in exactly
62 the same way that a Windows NT Server would do.</para>
64 <para><emphasis>Note</emphasis> that a valid UNIX user must still
65 exist as well as the account on the Domain Controller to allow
66 Samba to have a valid UNIX account to map file access to.</para>
68 <para><emphasis>Note</emphasis> that from the client's point
69 of view <command moreinfo="none">security = domain</command> is the same
70 as <command moreinfo="none">security = user</command>. It only
71 affects how the server deals with the authentication,
72 it does not in any way affect what the client sees.</para>
74 <para><emphasis>Note</emphasis> that the name of the resource being
75 requested is <emphasis>not</emphasis> sent to the server until after
76 the server has successfully authenticated the client. This is why
77 guest shares don't work in user level security without allowing
78 the server to automatically map unknown users into the <smbconfoption name="guest account"/>.
79 See the <smbconfoption name="map to guest"/> parameter for details on doing this.</para>
81 <para>See also the <smbconfoption name="password server"/> parameter and
82 the <smbconfoption name="encrypt passwords"/> parameter.</para>
84 <para><anchor id="SECURITYEQUALSADS"/><emphasis>SECURITY = ADS</emphasis></para>
86 <para>In this mode, Samba will act as a domain member in an ADS realm. To operate
87 in this mode, the machine running Samba will need to have Kerberos installed
88 and configured and Samba will need to be joined to the ADS realm using the
91 <para>Note that this mode does NOT make Samba operate as a Active Directory Domain
94 <para>Note that this forces <smbconfoption name="require strong key">yes</smbconfoption>
95 and <smbconfoption name="client schannel">yes</smbconfoption> for the primary domain.</para>
97 <para>Read the chapter about Domain Membership in the HOWTO for details.</para>
100 <related>realm</related>
101 <related>encrypt passwords</related>
103 <value type="default">AUTO</value>
104 <value type="example">DOMAIN</value>