docs/docbook/smbdotconf/security/hostsallow.xml


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<samba:parameter name="hosts allow"
                 context="S"
                 basic="1" advanced="1" print="1" developer="1"
                 xmlns:samba="http://samba.org/common">
<listitem>
    <para>A synonym for this parameter is <parameter moreinfo="none">allow 
    hosts</parameter>.</para>
		
    <para>This parameter is a comma, space, or tab delimited 
    set of hosts which are permitted to access a service.</para>

    <para>If specified in the [global] section then it will
    apply to all services, regardless of whether the individual 
    service has a different setting.</para>

    <para>You can specify the hosts by name or IP number. For 
    example, you could restrict access to only the hosts on a 
    Class C subnet with something like <command moreinfo="none">allow hosts = 150.203.5.
    </command>. The full syntax of the list is described in the man 
    page <filename moreinfo="none">hosts_access(5)</filename>. Note that this man
    page may not be present on your system, so a brief description will
    be given here also.</para>

    <para>Note that the localhost address 127.0.0.1 will always 
    be allowed access unless specifically denied by a <link linkend="HOSTSDENY">
    <parameter moreinfo="none">hosts deny</parameter></link> option.</para>

    <para>You can also specify hosts by network/netmask pairs and 
    by netgroup names if your system supports netgroups. The 
    <emphasis>EXCEPT</emphasis> keyword can also be used to limit a 
    wildcard list. The following examples may provide some help:</para>

    <para>Example 1: allow all IPs in 150.203.*.*; except one</para>

    <para><command moreinfo="none">hosts allow = 150.203. EXCEPT 150.203.6.66</command></para>

    <para>Example 2: allow hosts that match the given network/netmask</para>

    <para><command moreinfo="none">hosts allow = 150.203.15.0/255.255.255.0</command></para>

    <para>Example 3: allow a couple of hosts</para>

    <para><command moreinfo="none">hosts allow = lapland, arvidsjaur</command></para>

    <para>Example 4: allow only hosts in NIS netgroup &quot;foonet&quot;, but 
    deny access from one particular host</para>

    <para><command moreinfo="none">hosts allow = @foonet</command></para>

    <para><command moreinfo="none">hosts deny = pirate</command></para>

    <note><para>Note that access still requires suitable user-level passwords.</para></note>

    <para>See <citerefentry><refentrytitle>testparm</refentrytitle>
    <manvolnum>1</manvolnum></citerefentry> for a way of testing your host access 
    to see if it does what you expect.</para>

    <para>Default: <emphasis>none (i.e., all hosts permitted access)</emphasis></para>
		
    <para>Example: <command moreinfo="none">allow hosts = 150.203.5. myhost.mynet.edu.au</command></para>
</listitem>
</samba:parameter>