forked from extern/shorewall_code
80 lines
2.4 KiB
XML
80 lines
2.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
||
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
|
||
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
|
||
<article>
|
||
<!--$Id$-->
|
||
|
||
<articleinfo>
|
||
<title>Shorewall on a Laptop</title>
|
||
|
||
<authorgroup>
|
||
<author>
|
||
<firstname>Tom</firstname>
|
||
|
||
<surname>Eastep</surname>
|
||
</author>
|
||
</authorgroup>
|
||
|
||
<pubdate><?dbtimestamp format="Y/m/d"?></pubdate>
|
||
|
||
<copyright>
|
||
<year>2009</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>Overview</title>
|
||
|
||
<para>Laptop computers generally have several network interfaces, one of
|
||
which will be used at a time.</para>
|
||
|
||
<orderedlist>
|
||
<listitem>
|
||
<para>Ethernet interface ‒ Used when the computer is on the desktop at
|
||
home or at work.</para>
|
||
</listitem>
|
||
|
||
<listitem>
|
||
<para>Wireless interface ‒ Used when the laptop is being used in a
|
||
cafe, train or airline terminal.</para>
|
||
</listitem>
|
||
|
||
<listitem>
|
||
<para>Point-to-point (PPP) interface ‒ Used when neither wired nor
|
||
wireless service are available.</para>
|
||
</listitem>
|
||
</orderedlist>
|
||
|
||
<para>Shorewall can be configured to treat these interfaces the same and
|
||
to be able to switch between them without having to reconfigure.</para>
|
||
</section>
|
||
|
||
<section>
|
||
<title>Configuration</title>
|
||
|
||
<para>The key to configuring Shorewall on a laptop is to define multiple
|
||
optional interfaces for the 'net' zone in
|
||
<filename>/etc/shorewall/interfaces</filename>.</para>
|
||
|
||
<programlisting>#ZONE INTERFACE OPTIONS
|
||
net eth0 optional,…
|
||
net wlan0 optional,…
|
||
net ppp0 optional,…</programlisting>
|
||
|
||
<para>With this configuration, access to the 'net' zone is possible
|
||
regardless of which of the interfaces is being used.</para>
|
||
</section>
|
||
</article>
|