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shorewall_code/Shorewall-docs/errata_2.htm
teastep cbc3ac56b1 Add Corporate Network Example 
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<title>Shorewall 1.2 Errata</title>
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<h1 align="center"><font color="#ffffff">Shorewall 1.2 Errata</font></h1>
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</table>
<p align="center"> <font face="Century Gothic, Arial, Helvetica">
<b><u>IMPORTANT</u></b></font></p>
<p align="center"> <b><u>If you use a Windows system to download a
corrected script, be sure to run the script through <a
href="http://www.megaloman.com/%7Ehany/software/hd2u/"> dos2unix</a>
after you have moved it to your Linux system.</u></b></p>
<p align="center"> <u><b>When the instructions say to install a corrected
firewall script in /etc/shorewall/firewall, use the 'cp' (or 'scp')
utility to overwrite the existing file. DO NOT REMOVE OR RENAME THE
OLD /etc/shorewall/firewall before you do that. /etc/shorewall/firewall
is a symbolic link that points to the 'shorewall' file used by your
system initialization scripts to start Shorewall during boot and it
is that file that must be overwritten with the corrected script. </b></u></p>
<ul>
<li>
<h3 align="left"><font color="#660066"> <a href="errata_1.htm"> Problems
in Version 1.1</a></font></h3>
</li>
<li>
<h3 align="left"><a href="#V1.2">Problems in Version 1.2</a></h3>
</li>
<li>
<h3 align="left"><font color="#660066"><a href="#iptables"> Problem
with iptables version 1.2.3</a></font></h3>
</li>
<li>
<h3 align="left"><a href="#Debug">Problems with kernel 2.4.18 and
RedHat iptables</a></h3>
</li>
</ul>
<hr>
<h3 align="left"><a name="V1.2"></a>Problems in Version 1.2</h3>
<h3 align="left">Version 1.2.13</h3>
<ul>
<li>
<p align="left">Some users have reported problems installing the RPM
on SuSE 7.3 where rpm reports a conflict with kernel &lt;= 2.2 even
though a 2.4 kernel RPM is installed. To get around this problem,
use the --nodeps option to rpm (e.g., "rpm -ivh --nodeps
shorewall-1.2-13.noarch.rpm").<br>
<br>
The problem stems from the fact that SuSE does not include
a package named "kernel" but rather has a number of packages that
provide the virtual package "kernel". Since virtual packages have
no version associated with them, a conflict results. Since the
workaround is simple, I don't intend to change the Shorewall package.</p>
</li>
<li>
<p align="left">Shorewall accepts invalid rules of the form:<br>
<br>
<font face="Courier">ACCEPT &lt;src&gt; &lt;dest&gt;:&lt;ip addr&gt;
all &lt;port number&gt; - &lt;original ip address&gt;<br>
<br>
</font>The &lt;port number&gt; is ignored with the result that
<u>all</u> connection requests from the &lt;src&gt; zone whose
original destination IP address matches the last column are forwarded
to the &lt;dest&gt; zone, IP address &lt;ip addr&gt;.<2E>
<a
href="http://www.shorewall.net/pub/shorewall/errata/1.2.13/firewall">
This corrected firewall script</a> correctly generates an error when
such a rule is encountered.</p>
</li>
</ul>
<h3 align="left">Version 1.2.11</h3>
<ul>
<li>
<p align="left">The 'try' command is broken. </p>
</li>
<li>
<p align="left">The usage text printed by the shorewall utility
doesn't show the optional timeout for the 'try' command. </p>
</li>
</ul>
<p align="left">Both problems are corrected by <a
href="http://www.shorewall.net/pub/shorewall/errata/1.2.11/shorewall">
this new version of /sbin/shorewall</a>.</p>
<h3 align="left">Sample Configurations:</h3>
<ul>
<li>
<p align="left">There have been several problems with SSH, DNS and
ping in the two- and three-interface examples. Before reporting
problems with these services, please verify that you have the latest
version of the appropriate sample 'rules' file. </p>
</li>
</ul>
<h3 align="left">All Versions through 1.2.10</h3>
<ul>
<li>
<p align="left">The <a href="PPTP.htm#ServerFW">documentation for
running PoPToP on the firewall system</a> contained an incorrect entry
in the /etc/shorewall/hosts file. The corrected entry (underlined)
is shown here: </p>
</li>
</ul>
<blockquote>
<blockquote>
<table border="2">
<tbody>
<tr>
<td><b>ZONE</b></td>
<td><b>HOST(S)</b></td>
<td><b>OPTIONS</b></td>
</tr>
<tr>
<td>loc</td>
<td><u>eth2</u>:192.168.1.0/24</td>
<td>routestopped</td>
</tr>
<tr>
<td>loc</td>
<td>ppp+:192.168.1.0/24</td>
<td><EFBFBD></td>
</tr>
</tbody>
</table>
</blockquote>
</blockquote>
<h3 align="left">All Versions through 1.2.8</h3>
<ul>
<li>
<p align="left">The shorewall.conf file and the documentation
incorrectly refer to a parameter in /etc/shorewall/shorewall.conf
called LOCKFILE; the correct name for the parameter is SUBSYSLOCK (<a
href="Documentation.htm#Conf">see the corrected online documentation</a>).
Users of the rpm should change the name (and possibly the value)
of this parameter so that Shorewall interacts properly with the
SysV init scripts. The documentation on this web site has been
corrected and <a
href="http://www.shorewall.net/pub/shorewall/errata/1.2.8/shorewall.conf">
here's a corrected version of shorewall.conf</a>.</p>
</li>
<li>
<p align="left">The documentation indicates that a comma-separated
list of IP/subnet addresses may appear in an entry in the hosts file.
This is not the case; if you want to specify multiple addresses
for a zone, you need to have a separate entry for each address.</p>
</li>
</ul>
<h3 align="left">Version 1.2.7</h3>
<p align="left">Version 1.2.7 is quite broken -- please install 1.2.8</p>
<p>If you have installed and started version 1.2.7 then before trying
to restart under 1.2.8:</p>
<ol>
<li>Look at your /etc/shorewall/shorewall.conf file and note the directory
named in the STATEDIR variable. If that variable is empty, assume /var/state/shorewall.</li>
<li>Remove the file 'lock' in the directory determined in step 1.</li>
</ol>
<p>You may now restart using 1.2.8.</p>
<h3 align="left">Version 1.2.6</h3>
<ul>
<li>
<p align="left">GRE and IPIP tunnels are broken. </p>
</li>
<li>
<p align="left">The following rule results in a start error:<br>
<br>
<20><><EFBFBD> ACCEPT<50><54><EFBFBD> z1<7A><31><EFBFBD> z2<7A><32><EFBFBD> icmp </p>
</li>
</ul>
<p align="left">To correct the above problems, install <a
href="http://www.shorewall.net/pub/shorewall/errata/1.2.6/firewall">this
corrected firewall script</a> in<69> /etc/shorewall/firewall..</p>
<h3 align="left">Version 1.2.5</h3>
<ul>
<li>
<p align="left">The new ADDRESS column in /etc/shorewall/masq cannot
contain a $-variable name. </p>
</li>
<li>
<p align="left">Errors result if $FW appears in the /etc/shorewall/policy
file. </p>
</li>
<li>
<p align="left">Using Blacklisting without setting BLACKLIST_LOGLEVEL
results in an error at start time. </p>
</li>
</ul>
<p align="left">To correct the above problems, install <a
href="http://www.shorewall.net/pub/shorewall/errata/1.2.5/firewall">this
corrected firewall script</a> in /etc/shorewall/firewall.</p>
<p align="left"><EFBFBD></p>
<ul>
<li>
<p align="left">The /sbin/shorewall script produces error messages
saying that 'mygrep' cannot be found. <a
href="http://www.shorewall.net/pub/shorewall/errata/1.2.5/shorewall">
Here is the correct version of /sbin/shorewall.</a> </p>
</li>
</ul>
<h3 align="left">Version 1.2.4</h3>
<ul>
<li>
<p align="left">This version will not install "out of the box" without
modification. Before attempting to start the firewall, please change
the STATEDIR in /etc/shorewall/shorewall.conf to refer to /var/lib/shorewall.
This only applies to fresh installations -- if you are upgrading from
a previous version of Shorewall, version 1.2.4 will work without modification.
</p>
</li>
</ul>
<h3 align="left">Version 1.2.3</h3>
<ul>
<li>
<p align="left">When BLACKLIST_LOGLEVEL is set, packets from blacklisted
hosts aren't logged. Install <a
href="http://www.shorewall.net/pub/shorewall/errata/1.2.3/firewall">this
corrected firewall script</a> in /etc/shorewall/firewall. </p>
</li>
</ul>
<blockquote>
<p>Alternatively, edit /etc/shorewall/firewall and change line 1564 from:</p>
</blockquote>
<pre> run_iptables -A blacklst -d $addr -j LOG $LOGPARAMS --log-prefix \</pre>
<blockquote>
<p>to</p>
</blockquote>
<pre> run_iptables -A blacklst -s $addr -j LOG $LOGPARAMS --log-prefix \</pre>
<h3 align="left">Version 1.2.2</h3>
<ul>
<li>The "shorewall status" command hangs after it displays
the chain information. <a href="pub/shorewall/errata/1.2.2/shorewall">Here's
a corrected /sbin/shorewall.</a> if<69> you want to simply modify
your copy of /sbin/shorewall, then at line 445 change this:</li>
</ul>
<div align="left">
<pre align="Left"> status)<br> clear</pre>
</div>
<blockquote>
<p align="left">to this:</p>
</blockquote>
<div align="left">
<pre align="Left"> status)<br> get_config<br> clear</pre>
</div>
<ul>
<li>The "shorewall monitor" command doesn't show the icmpdef chain
- <a href="pub/shorewall/errata/1.2.2/shorewall">this corrected /sbin/shorewall</a>
fixes that problem as well as the status problem described above.</li>
</ul>
<ul>
<li>In all 1.2.x versions, the 'CLIENT PORT(S)' column in /etc/shorewall/tcrules
is ignored. This is corrected in <a
href="/pub/shorewall/errata/1.2.2/firewall">this updated firewall script</a>.<2E>
Place the script in /etc/shorewall/firewall. Thanks to Shingo Takeda for
spotting this bug.</li>
</ul>
<h3 align="left">Version 1.2.1</h3>
<ul>
<li>The new <i>logunclean </i>interface option is not described
in the help text in /etc/shorewall/interfaces. An <a
href="ftp://ftp.shorewall.net/pub/shorewall/errata/1.2.1/interfaces">updated
interfaces file</a> is available.</li>
<li>When REJECT is specified in a TCP rule, Shorewall correctly
replies with a TCP RST packet. Previous versions of the firewall
script are broken in the case of a REJECT policy, however; in REJECT
policy chains, all requests are currently replied to with an ICMP
port-unreachable packet. <a
href="http://www.shorewall.net/pub/shorewall/errata/1.2.1/firewall">This
corrected firewall script</a> replies to TCP requests with TCP
RST in REJECT policy chains. Place the script in /etc/shorewall/firewall.</li>
</ul>
<h3 align="left">Version 1.2.0</h3>
<blockquote>
<p align="left"><b>Note: </b>If you are upgrading from one of the Beta
RPMs to 1.2.0, you must use the "--oldpackage" option to rpm
(e.g., rpm -Uvh --oldpackage shorewall-1.2-0.noarch.rpm).</p>
<p align="left">The tunnel script released in version 1.2.0 contained
errors -- a <a
href="ftp://ftp.shorewall.net/pub/shorewall/errata/1.2.0/tunnel">corrected
script</a> is available.</p>
</blockquote>
<hr>
<h3 align="left"><a name="iptables"></a><font color="#660066"> Problem with
iptables version 1.2.3</font></h3>
<blockquote>
<p align="left">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.<2E></p>
<p align="left"> I have built a <a
href="ftp://ftp.shorewall.net/pub/shorewall/errata/iptables-1.2.3-3.i386.rpm">
corrected 1.2.3 rpm which you can download here</a><EFBFBD> and I have also built
an <a
href="ftp://ftp.shorewall.net/pub/shorewall/iptables-1.2.4-1.i386.rpm">
iptables-1.2.4 rpm which you can download here</a>. If you are currently
running RedHat 7.1, you can install either of these RPMs <b><u>before</u>
</b>you upgrade to RedHat 7.2.</p>
<p align="left"><font face="Century Gothic, Arial, Helvetica"
color="#ff6633"><b>Update 11/9/2001: </b></font>RedHat has released
an iptables-1.2.4 RPM of their own which you can download from<font
face="Century Gothic, Arial, Helvetica" color="#ff6633"> <a
href="http://www.redhat.com/support/errata/RHSA-2001-144.html">http://www.redhat.com/support/errata/RHSA-2001-144.html</a>.
</font>I have installed this RPM on my firewall and it works fine.</p>
<p align="left">If you would like to patch iptables 1.2.3 yourself,
the patches are available for download. This <a
href="ftp://ftp.shorewall.net/pub/shorewall/errata/iptables-1.2.3/loglevel.patch">patch</a>
which corrects a problem with parsing of the --log-level specification
while this <a
href="ftp://ftp.shorewall.net/pub/shorewall/errata/iptables-1.2.3/tos.patch">patch</a>
corrects a problem in handling the<68> TOS target.</p>
<p align="left">To install one of the above patches:</p>
<ul>
<li>cd iptables-1.2.3/extensions</li>
<li>patch -p0 &lt; <i>the-patch-file</i></li>
</ul>
</blockquote>
<h3><a name="Debug"></a>Problems with kernel 2.4.18
and RedHat iptables</h3>
<blockquote>
<p>Users who use RedHat iptables RPMs and who upgrade to kernel 2.4.18
may experience the following:</p>
<blockquote>
<pre># shorewall start<br>Processing /etc/shorewall/shorewall.conf ...<br>Processing /etc/shorewall/params ...<br>Starting Shorewall...<br>Loading Modules...<br>Initializing...<br>Determining Zones...<br>Zones: net<br>Validating interfaces file...<br>Validating hosts file...<br>Determining Hosts in Zones...<br>Net Zone: eth0:0.0.0.0/0<br>iptables: libiptc/libip4tc.c:380: do_check: Assertion<br>`h-&gt;info.valid_hooks == (1 &lt;&lt; 0 | 1 &lt;&lt; 3)' failed.<br>Aborted (core dumped)<br>iptables: libiptc/libip4tc.c:380: do_check: Assertion<br>`h-&gt;info.valid_hooks == (1 &lt;&lt; 0 | 1 &lt;&lt; 3)' failed.<br>Aborted (core dumped)<br></pre>
</blockquote>
<p>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 'mangle' table. You can correct the problem by installing
<a
href="http://www.shorewall.net/pub/shorewall/iptables-1.2.5-1.i386.rpm">
this iptables RPM</a>. If you are already running a 1.2.5 version of
iptables, you will need to specify the --oldpackage option to rpm (e.g.,
"iptables -Uvh --oldpackage iptables-1.2.5-1.i386.rpm").</p>
</blockquote>
<p><font face="Century Gothic, Arial, Helvetica"><font size="2"> Last updated
5/24/2002 - </font><font size="2"> <a
href="support.htm">Tom Eastep</a></font> </font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
<20> <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<br>
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