mirror of
https://gitlab.com/shorewall/code.git
synced 2024-12-26 08:08:59 +01:00
d823d9e5bf
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@2097 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
134 lines
4.3 KiB
XML
134 lines
4.3 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<article>
|
|
<!--$Id$-->
|
|
|
|
<articleinfo>
|
|
<title>Shorewall and UPnP</title>
|
|
|
|
<authorgroup>
|
|
<author>
|
|
<firstname>Tom</firstname>
|
|
|
|
<surname>Eastep</surname>
|
|
</author>
|
|
</authorgroup>
|
|
|
|
<pubdate>2005-05-07</pubdate>
|
|
|
|
<copyright>
|
|
<year>2005</year>
|
|
|
|
<holder>Thomas M. Eastep</holder>
|
|
</copyright>
|
|
|
|
<legalnotice>
|
|
<para>Permission is granted to copy, distribute and/or modify this
|
|
document under the terms of the GNU Free Documentation License, Version
|
|
1.2 or any later version published by the Free Software Foundation; with
|
|
no Invariant Sections, with no Front-Cover, and with no Back-Cover
|
|
Texts. A copy of the license is included in the section entitled
|
|
<quote><ulink url="GnuCopyright.htm">GNU Free Documentation
|
|
License</ulink></quote>.</para>
|
|
</legalnotice>
|
|
</articleinfo>
|
|
|
|
<section>
|
|
<title>UPnP</title>
|
|
|
|
<para>In Shorewall 2.2.4, support was added for UPnP (Universal Plug and
|
|
Play) using linux-igd (<ulink
|
|
url="http://linux-idg.sourceforge.net">http://linux-idg.sourceforge.net</ulink>).
|
|
UPnP is required by a number of popular applications including MSN
|
|
IM.</para>
|
|
|
|
<warning>
|
|
<para>From a security architecture viewpoint, UPnP is a disaster. It
|
|
assumes that:</para>
|
|
|
|
<orderedlist numeration="loweralpha">
|
|
<listitem>
|
|
<para>All local systems and their users are completely
|
|
trustworthy.</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>No local system is infected with any worm or trojan.</para>
|
|
</listitem>
|
|
</orderedlist>
|
|
|
|
<para>If either of these assumptions are not true then UPnP can be used
|
|
to totally defeat your firewall and to allow incoming connections to
|
|
arbitrary local systems on any port whatsoever. In short: USE UPnP AT
|
|
YOUR OWN RISK.</para>
|
|
</warning>
|
|
|
|
<warning>
|
|
<para>The linux-igd project appears to be inactive and the web site does
|
|
not display correctly on any open source browser that I've tried.
|
|
Building and installing linux-igd is not for the faint of heart. You
|
|
must download the source from CVS and be prepared to do quite a bit of
|
|
fiddling with the include files from libupnp (which is required to build
|
|
and/or run linux-igd).</para>
|
|
</warning>
|
|
|
|
<warning>
|
|
<para>Before building liunx-igd, you must apply all patches found at
|
|
<ulink
|
|
url="http://shorewall.net/pub/shorewall/contrib/linux-igd">http://shorewall.net/pub/shorewall/contrib/linux-igd</ulink>.</para>
|
|
</warning>
|
|
|
|
<para></para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>linux-idg Configuration</title>
|
|
|
|
<para>In /etc/upnpd.conf, you will want:</para>
|
|
|
|
<programlisting>insert_forward_rules = yes
|
|
prerouting_chain_name = UPnP
|
|
forward_chain_name = forwardUPnP</programlisting>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Shorewall Configuration</title>
|
|
|
|
<para>In <filename>/etc/shorewall/interfaces</filename>, you need the
|
|
'upnp' option on your external interface.</para>
|
|
|
|
<para>Example:</para>
|
|
|
|
<programlisting>#ZONE INTERFACE BROADCAST OPTIONS
|
|
net eth1 detect dhcp,routefilter,norfc1918,tcpflags,<emphasis
|
|
role="bold">upnp</emphasis></programlisting>
|
|
|
|
<para>If your fw->loc policy is not ACCEPT then you need this
|
|
rule:</para>
|
|
|
|
<programlisting>#ACTION SOURCE DEST
|
|
allowoutUPnP fw loc</programlisting>
|
|
|
|
<note>
|
|
<para>To use 'allowoutUPnP', your iptables and kernel must support the
|
|
'owner match' feature (see the output of "shorewall show
|
|
capabilities").</para>
|
|
</note>
|
|
|
|
<para>If your loc->fw policy is not ACCEPT then you need this
|
|
rule:</para>
|
|
|
|
<programlisting>#ACTION SOURCE DEST
|
|
allowinUPnP loc fw</programlisting>
|
|
|
|
<para>You MUST have this rule:</para>
|
|
|
|
<programlisting>#ACTION SOURCE DEST
|
|
forwardUPnP net loc</programlisting>
|
|
|
|
<para>You must also ensure that you have a route to 224.0.0.0/4 on your
|
|
internal (local) interface as described in the linux-idg
|
|
documentation.</para>
|
|
</section>
|
|
</article> |