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693 lines
25 KiB
XML
693 lines
25 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<article>
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<articleinfo>
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<title>Shorewall Errata</title>
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<authorgroup>
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<author>
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<firstname>Tom</firstname>
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<surname>Eastep</surname>
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</author>
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</authorgroup>
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<pubdate>2004-08-30</pubdate>
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<copyright>
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<year>2001-2004</year>
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<holder>Thomas M. Eastep</holder>
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</copyright>
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<legalnotice>
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<para>Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU Free Documentation License, Version
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1.2 or any later version published by the Free Software Foundation; with
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no Invariant Sections, with no Front-Cover, and with no Back-Cover
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Texts. A copy of the license is included in the section entitled
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<quote><ulink url="GnuCopyright.htm">GNU Free Documentation
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License</ulink></quote>.</para>
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</legalnotice>
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</articleinfo>
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<caution>
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<itemizedlist>
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<listitem>
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<para>If you use a Windows system to download a corrected script, be
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sure to run the script through <ulink
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url="http://www.megaloman.com/~hany/software/hd2u/">dos2unix</ulink>
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after you have moved it to your Linux system.</para>
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</listitem>
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<listitem>
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<para>If you are installing Shorewall for the first time and plan to
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use the .tgz and install.sh script, you can untar the archive, replace
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the <quote>firewall</quote> script in the untarred directory with the
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one you downloaded below, and then run install.sh.</para>
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</listitem>
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<listitem>
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<para>When the instructions say to install a corrected firewall script
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in /usr/share/shorewall/firewall, you may rename the existing file
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before copying in the new file.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">DO NOT INSTALL CORRECTED COMPONENTS ON A
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RELEASE EARLIER THAN THE ONE THAT THEY ARE LISTED UNDER
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BELOW.</emphasis> For example, do NOT install the 1.3.9a firewall
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script if you are running 1.3.7c.</para>
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</listitem>
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</itemizedlist>
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</caution>
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<section>
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<title>RFC1918 File</title>
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<para><ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.10/rfc1918">Here</ulink>
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is the most up to date version of the <ulink
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url="Documentation.htm#rfc1918">rfc1918 file</ulink>.</para>
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</section>
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<section>
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<title>Problems in Version 1.4</title>
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<section>
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<title>Shorewall 1.4.10f</title>
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<itemizedlist>
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<listitem>
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<para>Slackware users find that version 1.4.10f fails to start
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because their <command>mktemp</command> utility does not support the
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-d option. This may be corrected by installing <ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.10/functions">this
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corrected <filename>functions</filename> file</ulink> in <filename
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class="directory">/var/lib/shorewall/functions</filename>.</para>
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</listitem>
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<listitem>
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<para>Shorewall fails to start if there is no
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<command>mktemp</command> utility.</para>
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</listitem>
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</itemizedlist>
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<para>These problems have been corrected in Shorewall version
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1.4.10g.</para>
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</section>
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<section>
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<title>Shorewall 1.4.10</title>
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<itemizedlist>
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<listitem>
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<para>Unexplained errors may occur during "shorewall [re]start" when
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the /etc/shorewall/masq file is being processed.</para>
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</listitem>
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<listitem>
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<para>The <emphasis role="bold">maclist</emphasis> interface option
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previously wasn't available on Atheros WiFi cards.</para>
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</listitem>
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<listitem>
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<para>In the /etc/shorewall/masq entry <quote>eth0:!10.1.1.150
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0.0.0.0/0!10.1.0.0/16 10.1.2.16</quote>,
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the <quote>!10.1.0.0/16</quote> is ignored.</para>
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</listitem>
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<listitem>
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<para>A startup error occurs if an entry in the tcrules file has an
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empty USER/GROUP column.</para>
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</listitem>
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<listitem>
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<para>Specifying multiple excluded source zones in a REDIRECT or
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DNAT rule produces a startup error. Example of problem
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rule:<programlisting>#ACTION SOURCE DEST PROTO DEST PORT(S)
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DNAT z1!z2,z3 z4:192.168.4.5 tcp 22</programlisting></para>
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</listitem>
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<listitem>
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<para>When using an Action in the ACTIONS column of a rule, you may
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receive a warning message about the rule being a policy. While this
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warning may be safely ignored, it may be eliminated by installing
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the updated script linked below.</para>
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</listitem>
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<listitem>
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<para>Thanks to Sean Mathews, a long-standing problem with Proxy ARP
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and IPSEC has been corrected.</para>
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</listitem>
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<listitem>
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<para>A potentially exploitable vulnerability in the way that
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Shorewall handles temporary files and directories has been found by
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Javier Fernández-Sanguino Peña.</para>
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</listitem>
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</itemizedlist>
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<para>The first seven problems have been corrected in <ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.10/firewall">this
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firewall script</ulink> which may be installed in
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/usr/share/shorewall/firewall as described above.</para>
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<para>The first two problem corrections were included in Shorewall
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update 1.4.10a.</para>
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<para>The first three problem corrections were included in Shorewall
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update 1.4.10b.</para>
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<para>The first four problem corrections were included in Shorewall
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update 1.4.10c.</para>
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<para>The first six problem corrections were included in Shorewall
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update 1.4.10d.</para>
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<para>The first seven problems corrections were included in Shorewall
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update 1.4.10e;</para>
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<para>All problem corrections were included in Shorewall update
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1.4.10f.</para>
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</section>
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<section>
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<title>Shorewall 1.4.9</title>
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<itemizedlist>
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<listitem>
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<para>The column descriptions in the action.template file did not
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match the column headings.</para>
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</listitem>
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</itemizedlist>
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<para>This problem has been corrected in <ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.9/action.template">this
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action.template file</ulink> which may be installed in
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/etc/shorewall.</para>
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<itemizedlist>
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<listitem>
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<para>The presence of IPV6 addresses on devices generates error
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messages during <command>[re]start </command>if ADD_IP_ALIASES=Yes
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or ADD_SNAT_ALIASES=Yes are specified in
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/etc/shorewall/shorewall.conf.</para>
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</listitem>
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<listitem>
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<para>Unexplained errors may occur during "shorewall [re]start" when
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the /etc/shorewall/masq file is being processed.</para>
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</listitem>
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</itemizedlist>
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<para>These problems have been corrected in <ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.9/firewall">this
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firewall script</ulink> which may be installed in
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/usr/share/shorewall/firewall as described above.</para>
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</section>
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<section>
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<title>Shorewall 1.4.8</title>
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<itemizedlist>
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<listitem>
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<para>When a DNAT rules specifies SNAT (e.g., when <original dest
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addr>:<SNAT addr> is given in the ORIGINAL DEST column),
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the SNAT specification is effectively ignored in some cases.</para>
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</listitem>
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<listitem>
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<para>Unexplained errors may occur during "shorewall [re]start" when
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the /etc/shorewall/masq file is being processed.</para>
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</listitem>
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</itemizedlist>
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<para>These problems have been corrected in <ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.8/firewall">this
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firewall script</ulink> which may be installed in
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/usr/share/shorewall/firewall as described above.</para>
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</section>
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<section>
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<title>Shorewall 1.4.7</title>
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<itemizedlist>
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<listitem>
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<para>Using some versions of <quote>ash</quote> (such as from RH8)
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as the SHOREWALL_SHELL causes <quote>shorewall [re]start</quote> to
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fail with:<programlisting> local: --limit: bad variable name
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iptables v1.2.8: Couldn't load match `-j':/lib/iptables/libipt_-j.so:
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cannot open shared object file: No such file or directory
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Try `iptables -h' or 'iptables --help' for more information.</programlisting></para>
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</listitem>
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<listitem>
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<para>When more than one ICMP type is listed in a rule and your
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kernel includes multiport match support, the firewall fails to
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start.</para>
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</listitem>
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<listitem>
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<para>Regardless of the setting of LOGUNCLEAN, the value
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LOGUNCLEAN=info was used.</para>
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</listitem>
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<listitem>
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<para>After the following error message, Shorewall was left in an
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inconsistent state:<programlisting> Error: Unable to determine the routes through interface xxx</programlisting></para>
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</listitem>
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<listitem>
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<para>When a DNAT rules specifies SNAT (e.g., when <original dest
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addr>:<SNAT addr> is given in the ORIGINAL DEST column),
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the SNAT specification is effectively ignored in some cases.</para>
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</listitem>
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<listitem>
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<para>Unexplained errors may occur during "shorewall [re]start" when
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the /etc/shorewall/masq file is being processed.</para>
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</listitem>
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</itemizedlist>
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<para>These problems have been corrected in <ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.7/firewall">this
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firewall script</ulink> which may be installed in
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/usr/share/shorewall/firewall as described above.</para>
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</section>
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<section>
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<title>Shorewall 1.4.6</title>
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<itemizedlist>
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<listitem>
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<para>If TC_ENABLED is set to yes in shorewall.conf then Shorewall
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would fail to start with the error <quote>ERROR: Traffic
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Control requires Mangle</quote>; that problem has been corrected in
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<ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.6/firewall">this
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firewall script</ulink> which may be installed in
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/use/share/shorewall/firewall as described above. This problem is
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also corrected in bugfix release 1.4.6a.</para>
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</listitem>
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<listitem>
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<para>This problem occurs in all versions supporting traffic
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control. If a MAC address is used in the SOURCE column, an error
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occurs as follows:</para>
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<para><programlisting> iptables v1.2.8: Bad mac adress `00:08:B5:35:52:E7-d`</programlisting>For
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Shorewall 1.4.6 and 1.4.6a users, this problem has been corrected in
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<ulink
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url="http://shorewall.net/pub/shorewall/errata/1.4.6/firewall">this
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firewall script</ulink> which may be installed in
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/usr/share/shorewall/firewall as described above. For all other
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versions, you will have to edit your <quote>firewall</quote> script
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(in versions 1.4.*, it is located in /usr/share/shorewall/firewall).
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Locate the function add_tcrule_() and in that function, replace this
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line:<programlisting> r=`mac_match $source` </programlisting>with<programlisting> r="`mac_match $source` "</programlisting>Note
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that there must be a space before the ending quote!</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>Shorewall 1.4.4b</title>
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<itemizedlist>
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<listitem>
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<para>Shorewall is ignoring records in /etc/shorewall/routestopped
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that have an empty second column (HOSTS). This problem may be
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corrected by installing <ulink
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url="ftp://ftp1.shorewall.net/pub/shorewall/errata/1.4.4b/firewall">this
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firewall script</ulink> in /usr/share/shorewall/firewall as
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described above.</para>
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</listitem>
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<listitem>
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<para>The INCLUDE directive doesn't work when placed in the
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/etc/shorewall/zones file. This problem may be corrected by
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installing <ulink
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url="ftp://ftp1.shorewall.net/pub/shorewall/errata/1.4.4b/functions">this
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functions script</ulink> in /usr/share/shorewall/functions.</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>Shorewall 1.4.4-1.4.4a</title>
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<itemizedlist>
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<listitem>
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<para>Log messages are being displayed on the system console even
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though the log level for the console is set properly according to
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FAQ 16. This problem may be corrected by installing <ulink
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url="???">this firewall script</ulink> in
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/usr/share/shorewall/firewall as described above.</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>Shorewall 1.4.4</title>
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<itemizedlist>
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<listitem>
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<para>If you have zone names that are 5 characters long, you may
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experience problems starting Shorewall because the --log-prefix in a
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logging rule is too long. Upgrade to Version 1.4.4a to fix this
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problem..</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>Shorewall 1.4.3</title>
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<itemizedlist>
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<listitem>
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<para>The LOGMARKER variable introduced in version 1.4.3 was
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intended to allow integration of Shorewall with Fireparse
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(http://www.firewparse.com). Unfortunately, LOGMARKER only solved
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part of the integration problem. I have implimented a new LOGFORMAT
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variable which will replace LOGMARKER which has completely solved
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this problem and is currently in production with fireparse here at
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shorewall.net. The updated files may be found at <ulink
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url="ftp://ftp1.shorewall.net/pub/shorewall/errata/1.4.3/fireparse/">ftp://ftp1.shorewall.net/pub/shorewall/errata/1.4.3/fireparse/</ulink>.
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See the 0README.txt file for details.</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>Shorewall 1.4.2</title>
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<itemizedlist>
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<listitem>
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<para>When an <quote>add</quote> or <quote>delete</quote> command is
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executed, a temporary directory created in /tmp is not being
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removed. This problem may be corrected by installing <ulink
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url="ftp://ftp.shorewall.net/pub/shorewall/errata/1.4.2/firewall">this
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firewall script</ulink> in /usr/share/shorewall/firewall as
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described above.</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>Shorewall 1.4.1a, 1.4.1 and 1.4.0</title>
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<itemizedlist>
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<listitem>
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<para>Some TCP requests are rejected in the <quote>common</quote>
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chain with an ICMP port-unreachable response rather than the more
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appropriate TCP RST response. This problem is corrected in <ulink
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url="ftp://ftp.shorewall.net/pub/shorewall/errata/1.4.1a/common.def">this
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updated common.def file</ulink> which may be installed in
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/etc/shorewall/common.def.</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>Shorewall 1.4.1</title>
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<itemizedlist>
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<listitem>
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<para>When a <quote>shorewall check</quote> command is executed,
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each <quote>rule</quote> produces the harmless additional
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message:<programlisting> /usr/share/shorewall/firewall: line 2174: [: =: unary operator expected</programlisting>You
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may correct the problem by installing <ulink
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url="ftp://ftp.shorewall.net/pub/shorewall/errata/1.4.1/firewall">this
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corrected script</ulink> in /usr/share/shorewall/firewall as
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described above.</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>Shorewall 1.4.0</title>
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<itemizedlist>
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<listitem>
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<para>When running under certain shells Shorewall will attempt to
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create ECN rules even when /etc/shorewall/ecn is empty. You may
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either just remove /etc/shorewall/ecn or you can install <ulink
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url="http://www.shorewall.net/pub/shorewall/errata/1.4.0/firewall">this
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correct script</ulink> in /usr/share/shorewall/firewall as described
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above.</para>
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</listitem>
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</itemizedlist>
|
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</section>
|
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</section>
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<section>
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<title>Upgrade Issues</title>
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<para>The upgrade issues have moved to <ulink url="upgrade_issues.htm">a
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separate page</ulink>.</para>
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</section>
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<section>
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<title>Problem with iptables version 1.2.3</title>
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<para>There are a couple of serious bugs in iptables 1.2.3 that prevent it
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from working with Shorewall. Regrettably, RedHat released this buggy
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iptables in RedHat 7.2. </para>
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<para>I have built a <ulink
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url="ftp://ftp.shorewall.net/pub/shorewall/errata/iptables-1.2.3-3.i386.rpm">corrected
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1.2.3 rpm which you can download here</ulink> and I have also built
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an <ulink
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url="ftp://ftp.shorewall.net/pub/shorewall/iptables-1.2.4-1.i386.rpm">iptables-1.2.4
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rpm which you can download here</ulink>. If you are currently running
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RedHat 7.1, you can install either of these RPMs before you upgrade to
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RedHat 7.2.</para>
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<para><emphasis role="bold">Update 11/9/2001:</emphasis> RedHat has
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released an iptables-1.2.4 RPM of their own which you can download from
|
|
<ulink
|
|
url="http://www.redhat.com/support/errata/RHSA-2001-144.html.">http://www.redhat.com/support/errata/RHSA-2001-144.html</ulink>.I
|
|
have installed this RPM on my firewall and it works fine.</para>
|
|
|
|
<para>If you would like to patch iptables 1.2.3 yourself, the patches are
|
|
available for download. This <ulink
|
|
url="ftp://ftp.shorewall.net/pub/shorewall/errata/iptables-1.2.3/loglevel.patch">patch</ulink>
|
|
which corrects a problem with parsing of the --log-level specification
|
|
while this <ulink
|
|
url="ftp://ftp.shorewall.net/pub/shorewall/errata/iptables-1.2.3/tos.patch">patch</ulink>
|
|
corrects a problem in handling the TOS target.</para>
|
|
|
|
<para>To install one of the above patches:<programlisting> cd iptables-1.2.3/extensions
|
|
patch -p0 < the-patch-file</programlisting></para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Problems with kernels >= 2.4.18 and RedHat iptables</title>
|
|
|
|
<para>Users who use RedHat iptables RPMs and who upgrade to kernel
|
|
2.4.18/19 may experience the following:</para>
|
|
|
|
<blockquote>
|
|
<programlisting># shorewall start
|
|
Processing /etc/shorewall/shorewall.conf ...
|
|
Processing /etc/shorewall/params ...
|
|
Starting Shorewall...
|
|
Loading Modules...
|
|
Initializing...
|
|
Determining Zones...
|
|
Zones: net
|
|
Validating interfaces file...
|
|
Validating hosts file...
|
|
Determining Hosts in Zones...
|
|
Net Zone: eth0:0.0.0.0/0
|
|
iptables: libiptc/libip4tc.c:380: do_check: Assertion
|
|
`h->info.valid_hooks == (1 << 0 | 1 << 3)' failed.
|
|
Aborted (core dumped)
|
|
iptables: libiptc/libip4tc.c:380: do_check: Assertion
|
|
`h->info.valid_hooks == (1 << 0 | 1 << 3)' failed.
|
|
Aborted (core dumped)</programlisting>
|
|
</blockquote>
|
|
|
|
<para>The RedHat iptables RPM is compiled with debugging enabled but the
|
|
user-space debugging code was not updated to reflect recent changes in the
|
|
Netfilter <quote>mangle</quote> table. You can correct the problem by
|
|
installing <ulink
|
|
url="http://www.shorewall.net/pub/shorewall/iptables-1.2.5-1.i386.rpm">this
|
|
iptables RPM</ulink>. If you are already running a 1.2.5 version of
|
|
iptables, you will need to specify the --oldpackage option to rpm (e.g.,
|
|
<quote>iptables -Uvh --oldpackage
|
|
iptables-1.2.5-1.i386.rpm</quote>).</para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Problems with iptables version 1.2.7 and MULTIPORT=Yes</title>
|
|
|
|
<para>The iptables 1.2.7 release of iptables has made an incompatible
|
|
change to the syntax used to specify multiport match rules; as a
|
|
consequence, if you install iptables 1.2.7 you must be running Shorewall
|
|
1.3.7a or later or:</para>
|
|
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>set MULTIPORT=No in /etc/shorewall/shorewall.conf; or</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>If you are running Shorewall 1.3.6 you may install <ulink
|
|
url="http://www.shorewall.net/pub/shorewall/errata/1.3.6/firewall">this
|
|
firewall script</ulink> in /usr/lib/shorewall/firewall as described
|
|
above.</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Problems with RH Kernel 2.4.18-10 and NAT</title>
|
|
|
|
<para>/etc/shorewall/nat entries of the following form will result in
|
|
Shorewall being unable to start:</para>
|
|
|
|
<programlisting> #EXTERNAL INTERFACE INTERNAL ALL INTERFACES LOCAL
|
|
192.0.2.22 eth0 192.168.9.22 yes yes
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</programlisting>
|
|
|
|
<para>Error message is:</para>
|
|
|
|
<programlisting> Setting up NAT...
|
|
iptables: Invalid argument
|
|
Terminated</programlisting>
|
|
|
|
<para>The solution is to put <quote>no</quote> in the LOCAL column. Kernel
|
|
support for LOCAL=yes has never worked properly and 2.4.18-10 has disabled
|
|
it. The 2.4.19 kernel contains corrected support under a new kernel
|
|
configuraiton option; see <ulink
|
|
url="http://www.shorewall.net/Documentation.htm#NAT">http://www.shorewall.net/Documentation.htm#NAT</ulink>.</para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Problems with RH Kernels after 2.4.20-9 and REJECT (also applies to
|
|
2.4.21-RC1)</title>
|
|
|
|
<para>Beginning with errata kernel 2.4.20-13.9, <quote>REJECT
|
|
--reject-with tcp-reset</quote> is broken. The symptom most commonly seen
|
|
is that REJECT rules act just like DROP rules when dealing with TCP. A
|
|
kernel patch and precompiled modules to fix this problem are available at
|
|
<ulink
|
|
url="ftp://ftp1.shorewall.net/pub/shorewall/errata/kernel">ftp://ftp1.shorewall.net/pub/shorewall/errata/kernel</ulink></para>
|
|
|
|
<note>
|
|
<para>RedHat have corrected this problem in their 2.4.20-27.x
|
|
kernels.</para>
|
|
</note>
|
|
</section>
|
|
|
|
<appendix>
|
|
<title>Revision History4</title>
|
|
|
|
<para><revhistory>
|
|
<revision>
|
|
<revnumber>1.9</revnumber>
|
|
|
|
<date>2004-03-20</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Proxy ARP/IPSEC fix.</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.8</revnumber>
|
|
|
|
<date>2004-03-04</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Multiple excluded zones problem..</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.7</revnumber>
|
|
|
|
<date>2004-02-15</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>TCrules file problem..</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.6</revnumber>
|
|
|
|
<date>2004-02-09</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Masq file exclusion problem.</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.5</revnumber>
|
|
|
|
<date>2004-02-05</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Startup Problem</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.4</revnumber>
|
|
|
|
<date>2004-01-19</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>IPV6 address problems. Make RFC1918 file section more
|
|
prominent.</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.3</revnumber>
|
|
|
|
<date>2004-01-14</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Confusing template file in 1.4.9</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.3</revnumber>
|
|
|
|
<date>2004-01-03</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Added note about REJECT RedHat Kernal problem being
|
|
corrected.</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.2</revnumber>
|
|
|
|
<date>2003-12-29</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Updated RFC1918 file</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.1</revnumber>
|
|
|
|
<date>2003-12-17</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Initial Conversion to Docbook XML</revremark>
|
|
</revision>
|
|
</revhistory></para>
|
|
</appendix>
|
|
</article> |