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119 lines
4.3 KiB
XML
119 lines
4.3 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
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<refentry>
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<refmeta>
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<refentrytitle>shorewall6-nesting</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>nesting</refname>
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<refpurpose>shorewall6 Nested Zones</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<arg choice="plain"
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rep="norepeat"><replaceable>child-zone</replaceable>[:<replaceable>parent-zone</replaceable>[,<replaceable>parent-zone</replaceable>]...]</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>In <ulink url="shorewall-zones.html">shorewall6-zones</ulink>(5), a
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zone may be declared to be a sub-zone of one or more other zones using the
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above syntax. The <replaceable>child-zone</replaceable> may be neither the
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firewall zone nor a vserver zone. The firewall zone may not appear as a
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parent zone, although all vserver zones are handled as sub-zones of the
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firewall zone.</para>
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<para>Where zones are nested, the CONTINUE policy in <ulink
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url="shorewall6-policy.html">shorewall6-policy</ulink>(5) allows hosts
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that are within multiple zones to be managed under the rules of all of
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these zones.</para>
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</refsect1>
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<refsect1>
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<title>Example</title>
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<para><filename>/etc/shorewall6/zones</filename>:</para>
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<programlisting> #ZONE TYPE OPTION
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fw firewall
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net ipv6
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sam:net ipv6
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loc ipv6</programlisting>
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<para><filename>/etc/shorewall6/interfaces</filename>:</para>
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<programlisting> #ZONE INTERFACE BROADCAST OPTIONS
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- eth0 detect blacklist
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loc eth1 detect</programlisting>
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<para><filename>/etc/shorewall6/hosts</filename>:</para>
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<programlisting> #ZONE HOST(S) OPTIONS
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net eth0:[::\]
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sam eth0:[2001:19f0:feee::dead:beef:cafe]</programlisting>
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<para><filename>/etc/shorewall6/policy</filename>:</para>
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<programlisting> #SOURCE DEST POLICY LOG LEVEL
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loc net ACCEPT
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sam all CONTINUE
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net all DROP info
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all all REJECT info</programlisting>
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<para>The second entry above says that when Sam is the client, connection
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requests should first be processed under rules where the source zone is
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sam and if there is no match then the connection request should be treated
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under rules where the source zone is net. It is important that this policy
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be listed BEFORE the next policy (net to all). You can have this policy
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generated for you automatically by using the IMPLICIT_CONTINUE option in
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<ulink url="shorewall6.conf.html">shorewall6.conf</ulink>(5).</para>
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<para>Partial <filename>/etc/shorewall6/rules</filename>:</para>
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<programlisting> #ACTION SOURCE DEST PROTO DEST PORT(S)
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...
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ACCEPT sam loc:2001:19f0:feee::3 tcp ssh
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ACCEPT net loc:2001:19f0:feee::5 tcp www
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...</programlisting>
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<para>Given these two rules, Sam can connect with ssh to
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2001:19f0:feee::3. Like all hosts in the net zone, Sam can connect to TCP
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port 80 on 2001:19f0:feee::5. The order of the rules is not
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significant.</para>
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</refsect1>
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<refsect1>
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<title>FILES</title>
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<para>/etc/shorewall6/zones</para>
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<para>/etc/shorewall6/interfaces</para>
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<para>/etc/shorewall6/hosts</para>
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<para>/etc/shorewall6/policy</para>
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<para>/etc/shorewall6/rules</para>
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</refsect1>
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<refsect1>
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<title>See ALSO</title>
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<para>shorewall6(8), shorewall6-accounting(5), shorewall6-actions(5),
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shorewall6-blacklist(5), shorewall6-hosts(5), shorewall6-interfaces(5),
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shorewall6-maclist(5), shorewall6-params(5), shorewall6-policy(5),
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shorewall6-providers(5), shorewall6-route_rules(5),
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shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5), shorewall6-secmarks(5),
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shorewall6-tcclasses(5), shorewall6-tcdevices(5), shorewall6-tcrules(5),
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shorewall6-tos(5), shorewall6-tunnels(5), shorewall6-zones(5)</para>
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</refsect1>
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</refentry>
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