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diff --git a/docs/docbook/smbdotconf/base/bindinterfacesonly.xml b/docs/docbook/smbdotconf/base/bindinterfacesonly.xml new file mode 100644 index 0000000000..78e1b02bf5 --- /dev/null +++ b/docs/docbook/smbdotconf/base/bindinterfacesonly.xml @@ -0,0 +1,66 @@ +<samba:parameter xmlns:samba="http://samba.org/common"> + <term><anchor id="BINDINTERFACESONLY"/>bind interfaces only (G)</term> + <listitem><para>This global parameter allows the Samba admin + to limit what interfaces on a machine will serve SMB requests. It + affects file service <citerefentry><refentrytitle>smbd</refentrytitle> + <manvolnum>8</manvolnum></citerefentry> and name service <citerefentry><refentrytitle>nmbd</refentrytitle> + <manvolnum>8</manvolnum></citerefentry> in a slightly different ways.</para> + + <para>For name service it causes <command moreinfo="none">nmbd</command> to bind + to ports 137 and 138 on the interfaces listed in the <link linkend="INTERFACES">interfaces</link> parameter. <command moreinfo="none">nmbd + </command> also binds to the "all addresses" interface (0.0.0.0) + on ports 137 and 138 for the purposes of reading broadcast messages. + If this option is not set then <command moreinfo="none">nmbd</command> will service + name requests on all of these sockets. If <parameter moreinfo="none">bind interfaces + only</parameter> is set then <command moreinfo="none">nmbd</command> will check the + source address of any packets coming in on the broadcast sockets + and discard any that don't match the broadcast addresses of the + interfaces in the <parameter moreinfo="none">interfaces</parameter> parameter list. + As unicast packets are received on the other sockets it allows + <command moreinfo="none">nmbd</command> to refuse to serve names to machines that + send packets that arrive through any interfaces not listed in the + <parameter moreinfo="none">interfaces</parameter> list. IP Source address spoofing + does defeat this simple check, however, so it must not be used + seriously as a security feature for <command moreinfo="none">nmbd</command>.</para> + + <para>For file service it causes <citerefentry><refentrytitle>smbd</refentrytitle> + <manvolnum>8</manvolnum></citerefentry> to bind only to the interface list + given in the <link linkend="INTERFACES"> + interfaces</link> parameter. This restricts the networks that + <command moreinfo="none">smbd</command> will serve to packets coming in those + interfaces. Note that you should not use this parameter for machines + that are serving PPP or other intermittent or non-broadcast network + interfaces as it will not cope with non-permanent interfaces.</para> + + <para>If <parameter moreinfo="none">bind interfaces only</parameter> is set then + unless the network address <emphasis>127.0.0.1</emphasis> is added + to the <parameter moreinfo="none">interfaces</parameter> parameter list <citerefentry><refentrytitle>smbpasswd</refentrytitle> + <manvolnum>8</manvolnum></citerefentry> and <citerefentry><refentrytitle>swat</refentrytitle> + <manvolnum>8</manvolnum></citerefentry> may not work as expected due to the reasons covered below.</para> + + <para>To change a users SMB password, the <command moreinfo="none">smbpasswd</command> + by default connects to the <emphasis>localhost - 127.0.0.1</emphasis> + address as an SMB client to issue the password change request. If + <parameter moreinfo="none">bind interfaces only</parameter> is set then unless the + network address <emphasis>127.0.0.1</emphasis> is added to the + <parameter moreinfo="none">interfaces</parameter> parameter list then <command moreinfo="none"> + smbpasswd</command> will fail to connect in it's default mode. + <command moreinfo="none">smbpasswd</command> can be forced to use the primary IP interface + of the local host by using its <citerefentry><refentrytitle>smbpasswd</refentrytitle> + <manvolnum>8</manvolnum></citerefentry> <parameter moreinfo="none">-r <replaceable>remote machine</replaceable></parameter> + parameter, with <replaceable>remote machine</replaceable> set + to the IP name of the primary interface of the local host.</para> + + <para>The <command moreinfo="none">swat</command> status page tries to connect with + <command moreinfo="none">smbd</command> and <command moreinfo="none">nmbd</command> at the address + <emphasis>127.0.0.1</emphasis> to determine if they are running. + Not adding <emphasis>127.0.0.1</emphasis> will cause <command moreinfo="none"> + smbd</command> and <command moreinfo="none">nmbd</command> to always show + "not running" even if they really are. This can prevent <command moreinfo="none"> + swat</command> from starting/stopping/restarting <command moreinfo="none">smbd</command> + and <command moreinfo="none">nmbd</command>.</para> + + <para>Default: <command moreinfo="none">bind interfaces only = no</command></para> + + </listitem> + </samba:parameter> |