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shorewall_code/manpages/shorewall-rfc1918.xml

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<?xml version="1.0" encoding="UTF-8"?>
<refentry>
<refmeta>
<refentrytitle>shorewall-rfc1918</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>rfc1918</refname>
<refpurpose>Shorewall file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>/usr/share/shorewall/rfc1918</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>The rfc1918 file determines the handling of connections under the
norfc1918 option in <ulink
url="shorewall-interfaces.html">shorewall-interfaces</ulink>(5). Do not
modify <filename>/usr/share/shorewall/rfc1918</filename>; if you need to
change norfc1918 handling, then copy
<filename>/usr/share/shorewall/rfc1918</filename> to
<filename>/etc/shorewall/rfc1918</filename> and modify the copy.</para>
<para>The released version of this file logs and drops packets from the
three address ranges reserved by RFC 1918:</para>
<blockquote>
<programlisting>10.0.0.0/8
172.16.0.0/12
192.168.0.0/16</programlisting>
</blockquote>
<para>The columns in the file are as follows.</para>
<variablelist>
<varlistentry>
<term><emphasis role="bold">SUBNET -
<replaceable>address</replaceable></emphasis></term>
<listitem>
<para>Subnet address in CIDR format.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">TARGET</emphasis> - {<emphasis
role="bold">RETURN</emphasis>|<emphasis
role="bold">DROP</emphasis>|<emphasis
role="bold">logdrop</emphasis>}</term>
<listitem>
<para><emphasis role="bold">RETURN</emphasis> causes packets to/from
the specified subnet to be processed normally by the applicable
rules and policies.</para>
<para><emphasis role="bold">DROP</emphasis> causes packets from the
specified subnet to be silently dropped.</para>
<para><emphasis role="bold">logdrop</emphasis> causes packets from
the specified subnet to be logged at the level specified by the
RFC1918_LOG_LEVEL option in <ulink
url="shorewall.conf.html">shorewall.conf</ulink>(5).</para>
</listitem>
</varlistentry>
</variablelist>
<para>Also, please see the RFC1918_STRICT option in <ulink
url="shorewall.conf.html">shorewall.conf</ulink>(5).</para>
</refsect1>
<refsect1>
<title>FILES</title>
<para>/usr/share/shorewall/rfc1918</para>
<para>/etc/shorewall/rfc1918</para>
</refsect1>
<refsect1>
<title>See ALSO</title>
<para>shorewall(8), shorewall-accounting(5), shorewall-actions(5),
shorewall-blacklist(5), shorewall-hosts(5), shorewall-interfaces(5),
shorewall-ipsec(5), shorewall-maclist(5), shorewall-masq(5),
shorewall-nat(5), shorewall-netmap(5), shorewall-params(5),
shorewall-policy(5), shorewall-providers(5), shorewall-proxyarp(5),
shorewall-route_rules(5), shorewall-routestopped(5), shorewall-rules(5),
shorewall.conf(5), shorewall-tcclasses(5), shorewall-tcdevices(5),
shorewall-tcrules(5), shorewall-tos(5), shorewall-tunnels(5),
shorewall-zones(5)</para>
</refsect1>
</refentry>