5 <firstname>Andrew</firstname><surname>Tridgell</surname>
7 <pubdate>2002</pubdate>
10 <title>Using samba 3.0 with ActiveDirectory support</title>
13 This is a VERY ROUGH guide to setting up the current (November 2001)
14 pre-alpha version of Samba 3.0 with kerberos authentication against a
15 Windows2000 KDC. The procedures listed here are likely to change as
19 <para>Pieces you need before you begin:
21 <member>a Windows 2000 server.</member>
22 <member>samba 3.0 or higher.</member>
23 <member>the MIT kerberos development libraries (either install from the above sources or use a package). The heimdal libraries will not work.</member>
24 <member>the OpenLDAP development libraries.</member>
29 <title>Installing the required packages for Debian</title>
31 <para>On Debian you need to install the following packages:
33 <member>libkrb5-dev</member>
34 <member>krb5-user</member>
40 <title>Installing the required packages for RedHat</title>
42 <para>On RedHat this means you should have at least:
44 <member>krb5-workstation (for kinit)</member>
45 <member>krb5-libs (for linking with)</member>
46 <member>krb5-devel (because you are compiling from source)</member>
50 <para>in addition to the standard development environment.</para>
52 <para>Note that these are not standard on a RedHat install, and you may need
53 to get them off CD2.</para>
58 <title>Compile Samba</title>
59 <para>If your kerberos libraries are in a non-standard location then
60 remember to add the configure option --with-krb5=DIR.</para>
62 <para>After you run configure make sure that include/config.h contains
63 lines like this:</para>
65 <para><programlisting>
68 </programlisting></para>
70 <para>If it doesn't then configure did not find your krb5 libraries or
71 your ldap libraries. Look in config.log to figure out why and fix
74 <para>Then compile and install Samba as usual. You must use at least the
75 following 3 options in smb.conf:</para>
77 <para><programlisting>
78 realm = YOUR.KERBEROS.REALM
79 ads server = your.kerberos.server
81 encrypt passwords = yes
82 </programlisting></para>
84 <para>Strictly speaking, you can omit the realm name and you can use an IP
85 address for the ads server. In that case Samba will auto-detect these.</para>
87 <para>You do *not* need a smbpasswd file, although it won't do any harm
88 and if you have one then Samba will be able to fall back to normal
89 password security for older clients. I expect that the above
90 required options will change soon when we get better active
91 directory integration.</para>
95 <title>Setup your /etc/krb5.conf</title>
97 <para>The minimal configuration for krb5.conf is:</para>
99 <para><programlisting>
101 YOUR.KERBEROS.REALM = {
102 kdc = your.kerberos.server
104 </programlisting></para>
106 <para>Test your config by doing a "kinit USERNAME@REALM" and making sure that
107 your password is accepted by the Win2000 KDC. </para>
109 <para>NOTE: The realm must be uppercase. </para>
112 You also must ensure that you can do a reverse DNS lookup on the IP
113 address of your KDC. Also, the name that this reverse lookup maps to
114 must either be the netbios name of the KDC (ie. the hostname with no
115 domain attached) or it can alternatively be the netbios name
116 followed by the realm.
120 The easiest way to ensure you get this right is to add a /etc/hosts
121 entry mapping the IP address of your KDC to its netbios name. If you
122 don't get this right then you will get a "local error" when you try
127 If all you want is kerberos support in smbclient then you can skip
128 straight to step 5 now. Step 3 is only needed if you want kerberos
135 <title>Create the computer account</title>
138 Do a "kinit" as a user that has authority to change arbitrary
139 passwords on the KDC ("Administrator" is a good choice). Then as a
140 user that has write permission on the Samba private directory
142 <command>net ads join</command>
146 <title>Possible errors</title>
150 <varlistentry><term>"bash: kinit: command not found"</term>
151 <listitem><para>kinit is in the krb5-workstation RPM on RedHat systems, and is in /usr/kerberos/bin, so it won't be in the path until you log in again (or open a new terminal)</para></listitem></varlistentry>
152 <varlistentry><term>"ADS support not compiled in"</term>
153 <listitem><para>Samba must be reconfigured (remove config.cache) and recompiled (make clean all install) after the kerberos libs and headers are installed.</para></listitem></varlistentry>
162 <title>Test your server setup</title>
165 On a Windows 2000 client try <command>net use * \\server\share</command>. You should
166 be logged in with kerberos without needing to know a password. If
167 this fails then run <command>klist tickets</command>. Did you get a ticket for the
168 server? Does it have an encoding type of DES-CBC-MD5 ?
174 <title>Testing with smbclient</title>
177 On your Samba server try to login to a Win2000 server or your Samba
178 server using smbclient and kerberos. Use smbclient as usual, but
179 specify the -k option to choose kerberos authentication.
187 <para>You must change administrator password at least once after DC install,
188 to create the right encoding types</para>
190 <para>w2k doesn't seem to create the _kerberos._udp and _ldap._tcp in
191 their defaults DNS setup. Maybe fixed in service packs?</para>