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Diffstat (limited to 'docs-xml/smbdotconf/base/bindinterfacesonly.xml')
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diff --git a/docs-xml/smbdotconf/base/bindinterfacesonly.xml b/docs-xml/smbdotconf/base/bindinterfacesonly.xml new file mode 100644 index 0000000..9a148f3 --- /dev/null +++ b/docs-xml/smbdotconf/base/bindinterfacesonly.xml @@ -0,0 +1,57 @@ +<samba:parameter name="bind interfaces only" + type="boolean" + context="G" + xmlns:samba="http://www.samba.org/samba/DTD/samba-doc"> +<description> + <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 <smbconfoption name="interfaces"/> 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 <smbconfoption name="bind interfaces only"/> 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 + <smbconfoption name="interfaces"/> 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 <smbconfoption name="interfaces"/> 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 <smbconfoption + name="interfaces"/> parameter. This restricts the networks that <command moreinfo="none">smbd</command> will + serve, to packets coming in on 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 <smbconfoption name="bind interfaces only"/> is set and the network address + <emphasis>127.0.0.1</emphasis> is not added to the <smbconfoption name="interfaces"/> parameter list + <citerefentry><refentrytitle>smbpasswd</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 + <smbconfoption name="bind interfaces only"/> is set then unless the network address + <emphasis>127.0.0.1</emphasis> is added to the <smbconfoption name="interfaces"/> 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> + +</description> +<value type="default">no</value> +</samba:parameter> |