shorewall_code/Shorewall/manpages/shorewall-init.xml

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

    <manvolnum>8</manvolnum>

    <refmiscinfo>Administrative Commands</refmiscinfo>
  </refmeta>

  <refnamediv>
    <refname>shorewall-init</refname>

    <refpurpose>Companion package</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>shorewall-init</command>

      <arg>start|stop</arg>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para>Shorewall-init is an optional package (added in Shorewall 4.4.10)
    that can be installed along with Shorewall, Shorewall6, Shorewall-lite
    and/or Shorewall6-lite. It provides two key features:</para>

    <orderedlist>
      <listitem>
        <para>It can close (stop) the firewall during boot prior to starting
        the network. This can prevent unwanted connections from being accepted
        after the network comes up but before the firewall is started.</para>
      </listitem>

      <listitem>
        <para>It can interface with your distribution's ifup/ifdown scripts
        and/or NetworkManager to allow firewall actions when an interface
        starts or stops.</para>
      </listitem>
    </orderedlist>

    <para>These two capabilities can be enabled separately.</para>

    <para>After you install the shorewall-init package, you can activate it by
    modifying the <firstterm>Shorewall-init configuration
    file</firstterm>:</para>

    <itemizedlist>
      <listitem>
        <para>On Debian-based system, the file is
        <filename>/etc/default/shorewall-init</filename>.</para>
      </listitem>

      <listitem>
        <para>On other systems, the file is
        <filename>/etc/sysconfig/shorewall-init</filename>.</para>
      </listitem>
    </itemizedlist>

    <para>To activate the safe boot feature, edit the configuration file and
    set PRODUCTS to a space-separated list of Shorewall products that you want
    to be closed before networking starts.</para>

    <para>Example:</para>

    <simplelist>
      <member>PRODUCTS="shorewall shorewall6"</member>
    </simplelist>

    <para>You also must insure that the compiled scripts for the listed
    products are compiled using Shorewall 4.4.10 or later.</para>

    <variablelist>
      <varlistentry>
        <term>Shorewall</term>

        <listitem>
          <para><command>shorewall compile</command></para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>Shorewall6</term>

        <listitem>
          <para><command>shorewall6 compile</command></para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>Shorewall-lite</term>

        <listitem>
          <para>On the administrative system, enter the command
          <command>shorewall export firewall</command> from the firewall's
          configuration directory.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>Shorewall6-lite</term>

        <listitem>
          <para>On the administrative system, enter the command
          <command>shorewall6 export firewall</command> from the firewall's
          configuration directory.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <para>The second feature (ifup/ifdown and NetworkManager integration)
    should only be activated on systems that do not use a link status monitor
    line swping or LSM.</para>

    <itemizedlist>
      <listitem>
        <para>Edit the configuration file and set IFUPDOWN=1</para>
      </listitem>
    </itemizedlist>

    <para>For NetworkManager integration, you will want to disable firewall
    startup at boot and delay it to when your interface comes up. For this to
    work correctly, you must set the <firstterm>required</firstterm> or the
    <firstterm>optional</firstterm> option on at least one interface
    then:</para>

    <itemizedlist>
      <listitem>
        <para>On Debian-based systems, edit
        /etc/default/<replaceable>product</replaceable> for each
        <replaceable>product</replaceable> listed in the PRODUCTS setting and
        set <emphasis role="bold">startup=0</emphasis>.</para>
      </listitem>

      <listitem>
        <para>On other systems, use the distribution's service control tool
        (insserv, chkconfig, etc.) to disable startup of the products listed
        in the PRODUCTS setting.</para>
      </listitem>
    </itemizedlist>

    <para>On a laptop with both Ethernet and wireless interfaces, you will
    want to make both interfaces optional and set the REQUIRE_INTERFACE option
    to Yes in <ulink url="shorewall.conf.html">shorewall.conf
    </ulink>(5) or <ulink
    url="shorewall.conf.html">shorewall6.conf</ulink> (5). This
    causes the firewall to remain stopped until at least one of the interfaces
    comes up.</para>
  </refsect1>

  <refsect1>
    <title>FILES</title>

    <para><filename>/etc/default/shorewall-init</filename> (Debian-based
    systems) or <filename>/etc/sysconfig/shorewall-init</filename> (other
    distributions)</para>
  </refsect1>

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

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