forked from extern/shorewall_code
235 lines
9.8 KiB
XML
235 lines
9.8 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>
|
||
|
|
<articleinfo>
|
||
|
|
<title>Shorewall Errata</title>
|
||
|
|
|
||
|
|
<authorgroup>
|
||
|
|
<author>
|
||
|
|
<firstname>Tom</firstname>
|
||
|
|
|
||
|
|
<surname>Eastep</surname>
|
||
|
|
</author>
|
||
|
|
</authorgroup>
|
||
|
|
|
||
|
|
<pubdate>2004-02-03</pubdate>
|
||
|
|
|
||
|
|
<copyright>
|
||
|
|
<year>2001-2004</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>
|
||
|
|
|
||
|
|
<caution>
|
||
|
|
<itemizedlist>
|
||
|
|
<listitem>
|
||
|
|
<para>If you use a Windows system to download a corrected script, be
|
||
|
|
sure to run the script through <ulink
|
||
|
|
url="http://www.megaloman.com/~hany/software/hd2u/">dos2unix</ulink>
|
||
|
|
after you have moved it to your Linux system.</para>
|
||
|
|
</listitem>
|
||
|
|
|
||
|
|
<listitem>
|
||
|
|
<para>If you are installing Shorewall for the first time and plan to
|
||
|
|
use the .tgz and install.sh script, you can untar the archive, replace
|
||
|
|
the <quote>firewall</quote> script in the untarred directory with the
|
||
|
|
one you downloaded below, and then run install.sh.</para>
|
||
|
|
</listitem>
|
||
|
|
|
||
|
|
<listitem>
|
||
|
|
<para>When the instructions say to install a corrected firewall script
|
||
|
|
in /usr/share/shorewall/firewall, you may rename the existing file
|
||
|
|
before copying in the new file.</para>
|
||
|
|
</listitem>
|
||
|
|
|
||
|
|
<listitem>
|
||
|
|
<para><emphasis role="bold">DO NOT INSTALL CORRECTED COMPONENTS ON A
|
||
|
|
RELEASE EARLIER THAN THE ONE THAT THEY ARE LISTED UNDER BELOW.</emphasis>
|
||
|
|
For example, do NOT install the 1.3.9a firewall script if you are
|
||
|
|
running 1.3.7c.</para>
|
||
|
|
</listitem>
|
||
|
|
</itemizedlist>
|
||
|
|
</caution>
|
||
|
|
|
||
|
|
<section>
|
||
|
|
<title>RFC1918 File</title>
|
||
|
|
|
||
|
|
<para><ulink url="http://shorewall.net/pub/shorewall/errata/1.4.8/rfc1918">Here</ulink>
|
||
|
|
is the most up to date version of the <ulink
|
||
|
|
url="Documentation.htm#rfc1918">rfc1918 file</ulink>.</para>
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section>
|
||
|
|
<title>Problems in Version 2.0</title>
|
||
|
|
|
||
|
|
<section>
|
||
|
|
<title>Shorewall 2.0.0-Beta 1</title>
|
||
|
|
|
||
|
|
<itemizedlist>
|
||
|
|
<listitem>
|
||
|
|
<para></para>
|
||
|
|
</listitem>
|
||
|
|
</itemizedlist>
|
||
|
|
</section>
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section>
|
||
|
|
<title>Upgrade Issues</title>
|
||
|
|
|
||
|
|
<para>The upgrade issues have moved to <ulink url="upgrade_issues.htm">a
|
||
|
|
separate page</ulink>.</para>
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section>
|
||
|
|
<title>Problem with iptables version 1.2.3</title>
|
||
|
|
|
||
|
|
<para>There are a couple of serious bugs in iptables 1.2.3 that prevent it
|
||
|
|
from working with Shorewall. Regrettably, RedHat released this buggy
|
||
|
|
iptables in RedHat 7.2. </para>
|
||
|
|
|
||
|
|
<para>I have built a <ulink
|
||
|
|
url="ftp://ftp.shorewall.net/pub/shorewall/errata/iptables-1.2.3-3.i386.rpm">corrected
|
||
|
|
1.2.3 rpm which you can download here</ulink>  and I have also
|
||
|
|
built an <ulink
|
||
|
|
url="ftp://ftp.shorewall.net/pub/shorewall/iptables-1.2.4-1.i386.rpm">iptables-1.2.4
|
||
|
|
rpm which you can download here</ulink>. If you are currently running
|
||
|
|
RedHat 7.1, you can install either of these RPMs before you upgrade to
|
||
|
|
RedHat 7.2.</para>
|
||
|
|
|
||
|
|
<para><emphasis role="bold">Update 11/9/2001:</emphasis> RedHat has
|
||
|
|
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>1.5</revnumber><date>2004-02-03</date><authorinitials>TE</authorinitials><revremark>Update
|
||
|
|
for Shorewall 2.0.0.</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>
|