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Add FAQ about init scripts

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@7432 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep 2007-10-07 15:09:57 +00:00
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docs/FAQ.xml
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@ -1771,6 +1771,43 @@ iptables: Invalid argument
that command can run without error, no stateful iptables firewall will
be able to run in your VM.</para>
</section>
<section id="faq73">
<title>(FAQ 73) When I stop Shorewall, the firewall is wide open. Isn't
that a security risk?</title>
<para>It is important to understand that the scripts in <filename
class="directory">/etc/init.d</filename> are generally provided by your
distribution and not by the Shorewall developers. These scripts must
meet the requirements of the distribution's packaging system which may
conflict with the requirements of a tight firewall. So when you say
"…when I stop Shorewall…" it is necessary to distinguish between the
commands <command>/sbin/shorewall stop</command> and
<command>/etc/init.d/shorewall stop</command>.</para>
<para><command>/sbin/shorewall stop</command> places the firewall in a
<firstterm>safe state</firstterm>, the details of which depend on your
<filename>/etc/shorewall/routestopped</filename> file (<ulink
url="manpages/shorewall-routestopped.html">shorewall-routestopped</ulink>(8))
and on the setting of ADMINISABSENTMINDED in
<filename>/etc/shorewall/shorewall.conf</filename> (<ulink
url="manpages/shorewall.conf.html">shorewall.conf</ulink>(8)).</para>
<para><command>/etc/init.d/shorewall stop</command> may or may not do
the same thing. In the case of <trademark>Debian</trademark> systems for
example, that command actually executes <command>/sbin/shorewall
clear</command> which opens the firewall completely. In other words, in
the init scripts <command>stop</command> undoes the effect of
<command>start</command>.</para>
<para>One way to avoid these differences is to install Shorewall from
the tarballs available from shorewall.net. This places Shorewall outside
of the control of the packaging system and provides consistent behavior
between the init scripts and <filename>/sbin/shorewall</filename> (and
<filename>/sbin/shorewall-lite</filename>). For more information on the
tradeoffs involved when deciding whether to use the Debian package, see
<ulink url="???">this article</ulink>.</para>
</section>
</section>
<section id="MultiISP">