shorewall_code/Shorewall/manpages/shorewall-proxyarp.xml

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<refentry>
  <refmeta>
    <refentrytitle>shorewall-proxyarp</refentrytitle>

    <manvolnum>5</manvolnum>

    <refmiscinfo>Configuration Files</refmiscinfo>
  </refmeta>

  <refnamediv>
    <refname>proxyarp</refname>

    <refpurpose>Shorewall Proxy ARP file</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>/etc/shorewall/proxyarp</command>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para>IPv4 only.</para>

    <para>This file is used to define Proxy ARP. There is one entry in this
    file for each IP address to be proxied.</para>

    <para>The columns in the file are as follows.</para>

    <variablelist>
      <varlistentry>
        <term><emphasis role="bold">ADDRESS</emphasis> -
        <emphasis>address</emphasis></term>

        <listitem>
          <para>IP Address.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis role="bold">INTERFACE</emphasis> -
        <emphasis>interface</emphasis> (Optional as of Shorewall
        4.4.16)</term>

        <listitem>
          <para>Local interface where system with the ip address in ADDRESS is
          connected. This column is only required when HAVEROUTE is set to
          <emphasis role="bold">No</emphasis> (<emphasis
          role="bold">no</emphasis>) or is left empty.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis role="bold">EXTERNAL</emphasis> -
        <emphasis>interface</emphasis></term>

        <listitem>
          <para>External Interface to be used to access this system from the
          Internet.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis role="bold">HAVEROUTE</emphasis> - [<emphasis
        role="bold">-</emphasis>|<emphasis
        role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>]</term>

        <listitem>
          <para>If there is already a route from the firewall to the host
          whose address is given, enter <emphasis role="bold">Yes</emphasis>
          or <emphasis role="bold">yes</emphasis> in this column. Otherwise,
          enter <emphasis role="bold">no</emphasis> or <emphasis
          role="bold">No</emphasis> or leave the column empty and Shorewall
          will add the route for you. If Shorewall adds the route, its
          persistence depends on the value of the<emphasis
          role="bold">PERSISTENT</emphasis> column contains <emphasis
          role="bold">Yes</emphasis>; otherwise, <emphasis
          role="bold">shorewall stop</emphasis> or <emphasis
          role="bold">shorewall clear</emphasis> will delete the route.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis role="bold">PERSISTENT</emphasis> - [<emphasis
        role="bold">-</emphasis>|<emphasis
        role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>]</term>

        <listitem>
          <para>If HAVEROUTE is <emphasis role="bold">No</emphasis> or
          <emphasis role="bold">no</emphasis>, then the value of this column
          determines if the route added by Shorewall persists after a
          <emphasis role="bold">shorewall stop</emphasis> or a <emphasis
          role="bold">shorewall clear</emphasis>. If this column contains
          <emphasis role="bold">Yes</emphasis> or <emphasis
          role="bold">yes</emphasis> then the route persists; If the column is
          empty or contains <emphasis role="bold">No</emphasis> or <emphasis
          role="bold">no</emphasis> then the route is deleted by
          <command>shorewall stop</command> or <command>shorewall
          clear</command>.</para>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>Example</title>

    <variablelist>
      <varlistentry>
        <term>Example 1:</term>

        <listitem>
          <para>Host with IP 155.186.235.6 is connected to interface eth1 and
          we want hosts attached via eth0 to be able to access it using that
          address.</para>

          <programlisting>       #ADDRESS        INTERFACE       EXTERNAL
       155.186.235.6   eth1            eth0</programlisting>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>FILES</title>

    <para>/etc/shorewall/proxyarp</para>
  </refsect1>

  <refsect1>
    <title>See ALSO</title>

    <para><ulink
    url="../ProxyARP.htm">https://shorewall.org/ProxyARP.htm</ulink></para>

    <para><ulink
    url="../configuration_file_basics.htm#Pairs">https://shorewall.org/configuration_file_basics.htm#Pairs</ulink></para>

    <para>shorewall(8)</para>
  </refsect1>
</refentry>