diff options
Diffstat (limited to 'docs-xml/smbdotconf')
| -rw-r--r-- | docs-xml/smbdotconf/security/passwordserver.xml | 106 |
1 files changed, 54 insertions, 52 deletions
diff --git a/docs-xml/smbdotconf/security/passwordserver.xml b/docs-xml/smbdotconf/security/passwordserver.xml index 0e92af9eba..0ac39f103c 100644 --- a/docs-xml/smbdotconf/security/passwordserver.xml +++ b/docs-xml/smbdotconf/security/passwordserver.xml @@ -10,54 +10,24 @@ it is possible to get Samba to do all its username/password validation using a specific remote server.</para> - <para>This option sets the name or IP address of the password server to use. - New syntax has been added to support defining the port to use when connecting - to the server the case of an ADS realm. To define a port other than the - default LDAP port of 389, add the port number using a colon after the - name or IP address (e.g. 192.168.1.100:389). If you do not specify a port, - Samba will use the standard LDAP port of tcp/389. Note that port numbers - have no effect on password servers for Windows NT 4.0 domains or netbios - connections.</para> - - <para>If parameter is a name, it is looked up using the - parameter <smbconfoption name="name resolve order"/> and so may resolved - by any method and order described in that parameter.</para> - - <para>The password server must be a machine capable of using - the "LM1.2X002" or the "NT LM 0.12" protocol, and it must be in - user level security mode.</para> - - <note><para>Using a password server means your UNIX box (running - Samba) is only as secure as your password server. <emphasis>DO NOT - CHOOSE A PASSWORD SERVER THAT YOU DON'T COMPLETELY TRUST</emphasis>. - </para></note> - - <para>Never point a Samba server at itself for password serving. - This will cause a loop and could lock up your Samba server!</para> - - <para>The name of the password server takes the standard - substitutions, but probably the only useful one is <parameter moreinfo="none">%m - </parameter>, which means the Samba server will use the incoming - client as the password server. If you use this then you better - trust your clients, and you had better restrict them with hosts allow!</para> - <para>If the <parameter moreinfo="none">security</parameter> parameter is set to - <constant>domain</constant> or <constant>ads</constant>, then the list of machines in this - option must be a list of Primary or Backup Domain controllers for the - Domain or the character '*', as the Samba server is effectively - in that domain, and will use cryptographically authenticated RPC calls - to authenticate the user logging on. The advantage of using <command moreinfo="none"> - security = domain</command> is that if you list several hosts in the - <parameter moreinfo="none">password server</parameter> option then <command moreinfo="none">smbd - </command> will try each in turn till it finds one that responds. This - is useful in case your primary server goes down.</para> + <constant>domain</constant> or <constant>ads</constant>, then this option + <emphasis>should not</emphasis> be used, as the default '*' indicates to Samba + to determine the best DC to contact dynamically, just as all other hosts in an + AD domain do. This allows the domain to be maintained without modification to + the smb.conf file. The cryptograpic protection on the authenticated RPC calls + used to verify passwords ensures that this default is safe.</para> - <para>If the <parameter moreinfo="none">password server</parameter> option is set - to the character '*', then Samba will attempt to auto-locate the - Primary or Backup Domain controllers to authenticate against by - doing a query for the name <constant>WORKGROUP<1C></constant> - and then contacting each server returned in the list of IP - addresses from the name resolution source. </para> + <para><emphasis>It is strongly recommended that you use the + default of '*'</emphasis>, however if in your particular + environment you have reason to specify a particular DC list, then + the list of machines in this option must be a list of names or IP + addresses of Domain controllers for the Domain. If you use the + default of '*', or list several hosts in the <parameter + moreinfo="none">password server</parameter> option then <command + moreinfo="none">smbd </command> will try each in turn till it + finds one that responds. This is useful in case your primary + server goes down.</para> <para>If the list of servers contains both names/IP's and the '*' character, the list is treated as a list of preferred @@ -65,10 +35,12 @@ will be added to the list as well. Samba will not attempt to optimize this list by locating the closest DC.</para> + <para>If parameter is a name, it is looked up using the + parameter <smbconfoption name="name resolve order"/> and so may resolved + by any method and order described in that parameter.</para> + <para>If the <parameter moreinfo="none">security</parameter> parameter is - set to <constant>server</constant>, then there are different - restrictions that <command moreinfo="none">security = domain</command> doesn't - suffer from:</para> + set to <constant>server</constant>, these additional restrictions apply:</para> <itemizedlist> <listitem> @@ -82,12 +54,42 @@ </listitem> <listitem> - <para>If you are using a Windows NT server as your - password server then you will have to ensure that your users + <para>You will have to ensure that your users are able to login from the Samba server, as when in <command moreinfo="none"> security = server</command> mode the network logon will appear to - come from there rather than from the users workstation.</para> + come from the Samba server rather than from the users workstation.</para> </listitem> + + <listitem> + <para>The client must not select NTLMv2 authentication.</para> + </listitem> + + <listitem> + <para>The password server must be a machine capable of using + the "LM1.2X002" or the "NT LM 0.12" protocol, and it must be in + user level security mode.</para> + </listitem> + + <listitem> + <para>Using a password server means your UNIX box (running + Samba) is only as secure as (a host masqurading as) your password server. <emphasis>DO NOT + CHOOSE A PASSWORD SERVER THAT YOU DON'T COMPLETELY TRUST</emphasis>. + </para> + </listitem> + + <listitem> + <para>Never point a Samba server at itself for password serving. + This will cause a loop and could lock up your Samba server!</para> + </listitem> + + <listitem> + <para>The name of the password server takes the standard + substitutions, but probably the only useful one is <parameter moreinfo="none">%m + </parameter>, which means the Samba server will use the incoming + client as the password server. If you use this then you better + trust your clients, and you had better restrict them with hosts allow!</para> + </listitem> + </itemizedlist> </description> |