mirror of
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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@813 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
435 lines
18 KiB
HTML
435 lines
18 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type"
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content="text/html; charset=windows-1252">
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<title>Shoreline Firewall (Shorewall) 1.4</title>
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<base target="_self">
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</head>
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<body>
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<div align="center">
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<div align="center"> </div>
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<center>
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<div align="center"> </div>
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<table border="0" cellpadding="0" cellspacing="0"
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style="border-collapse: collapse; width: 100%; height: 100%;"
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id="AutoNumber4">
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<tbody>
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<tr>
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<td width="90%">
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<h2>Site Problem</h2>
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The server that normally hosts www.shorewall.net and ftp.shorewall.net
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is currently down. Until it is back up, a small server with very
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limited bandwidth is being used temporarly. You will likely experience
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better response time from the <a
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href="http://shorewall.sourceforge.net" target="_top">Sourceforge site</a>
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or from one of the other <a href="shorewall_mirrors.htm">mirrors</a>.
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Sorry for the inconvenience.<br>
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<br>
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<h2>Introduction to Shorewall<br>
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</h2>
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<h3>This is the Shorewall 1.4 Web Site</h3>
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The information on this site applies only to 1.4.x releases of
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Shorewall. For older versions:<br>
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<ul>
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<li>The 1.3 site is <a href="http://www.shorewall.net/1.3"
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target="_top">here.</a></li>
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<li>The 1.2 site is <a href="http://shorewall.net/1.2/"
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target="_top">here</a>.</li>
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</ul>
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<h3>Glossary<br>
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</h3>
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<ul>
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<li><a href="http://www.netfilter.org">Netfilter</a> - the
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packet filter facility built into the 2.4 and later Linux kernels.</li>
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<li>ipchains - the packet filter facility built into the 2.2
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Linux kernels. Also the name of the utility program used to configure
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and control that facility. Netfilter can be used in ipchains
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compatibility mode.<br>
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</li>
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<li>iptables - the utility program used to configure and
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control Netfilter. The term 'iptables' is often used to refer to the
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combination of iptables+Netfilter (with Netfilter not in ipchains
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compatibility mode).</li>
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</ul>
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<h3>What is Shorewall?<br>
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</h3>
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The Shoreline Firewall, more commonly known as "Shorewall", is
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high-level tool for configuring Netfilter. You describe your
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firewall/gateway requirements using entries in a set of configuration
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files. Shorewall reads those configuration files and with the help of
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the iptables utility, Shorewall configures Netfilter to match your
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requirements. Shorewall can be used on a dedicated firewall system, a
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multi-function gateway/router/server or on a standalone GNU/Linux
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system. Shorewall does not use Netfilter's ipchains compatibility mode
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and can thus take advantage of Netfilter's connection state tracking
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capabilities.<br>
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<br>
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Shorewall is <span style="text-decoration: underline;">not</span> a
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daemon. Once Shorewall has configured Netfilter, it's job is complete
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although the <a href="starting_and_stopping_shorewall.htm">/sbin/shorewall
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program can be used at any time to monitor the Netfilter firewall</a>.<br>
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<h3>Getting Started with Shorewall</h3>
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New to Shorewall? Start by selecting the <a
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href="shorewall_quickstart_guide.htm">QuickStart Guide</a> that most
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closely match your environment and follow the step by step instructions.<br>
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<h3>Looking for Information?</h3>
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The <a href="shorewall_quickstart_guide.htm#Documentation">Documentation
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Index</a> is a good place to start as is the Quick Search in the frame
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above.
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<h3>License<br>
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</h3>
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This program is free software; you can redistribute it and/or modify it
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under the terms of <a href="http://www.gnu.org/licenses/gpl.html">Version
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2 of the GNU General Public License</a> as published by the Free
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Software Foundation.<br>
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<p> This program is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General
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Public License for more details.<br>
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<br>
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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675 Mass Ave, Cambridge, MA 02139, USA</p>
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<p><a href="copyright.htm">Copyright 2001, 2002, 2003 Thomas M.
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Eastep</a><br>
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</p>
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<h3>Running Shorewall on Mandrake with a two-interface setup?</h3>
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If so, the documentation<b> </b>on this site will not apply directly
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to
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your setup. If you want to use the documentation that you find here,
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you will want to consider uninstalling what you have and installing a
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setup that matches the documentation on this site. See the <a
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href="two-interface.htm">Two-interface QuickStart Guide</a> for
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details.<br>
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<h2>News</h2>
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<p><b>12/07/2003 - Shorewall 1.4.9 Beta 1 </b><b> <img
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style="border: 0px solid ; width: 28px; height: 12px;"
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src="images/new10.gif" alt="(New)" title=""><br>
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</b></p>
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<div style="margin-left: 40px;"><a
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href="http://shorewall.net/pub/shorewall/Beta">http://shorewall.net/pub/shorewall/Beta</a><br>
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<a href="ftp://shorewall.net/pub/shorewall/Beta" target="_top">ftp://shorewall.net/pub/shorewall/Beta</a><br>
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</div>
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<p>Problems Corrected since version 1.4.8:<br>
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</p>
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<ol>
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<li>There has been a low continuing level of confusion over the
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terms "Source NAT" (SNAT) and "Static NAT". To avoid future confusion,
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all instances of "Static NAT" have been replaced with "One-to-one NAT"
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in the documentation and configuration files.</li>
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<li>The description of NEWNOTSYN in shorewall.conf has been
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reworded for clarity.</li>
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<li>Wild-card rules (those involving "all" as SOURCE or DEST)
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will no longer produce an error if they attempt to add a rule that would
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override a NONE policy. The logic for expanding these wild-card rules
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now simply skips those (SOURCE,DEST) pairs that have a NONE policy.<br>
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</li>
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</ol>
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<p>Migration Issues:<br>
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<br>
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None.<br>
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<br>
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New Features:<br>
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</p>
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<ol>
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<li>To cut down on the number of "Why are these ports closed
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rather than stealthed?" questions, the SMB-related rules in
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/etc/shorewall/common.def have been changed from 'reject' to 'DROP'.</li>
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<li>For easier identification, packets logged under the
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'norfc1918' interface option are now logged out of chains named
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'rfc1918'. Previously, such packets were logged under chains named
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'logdrop'.</li>
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<li>Distributors and developers seem to be regularly inventing
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new naming conventions for kernel modules. To avoid the need to change
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Shorewall code for each new convention, the MODULE_SUFFIX option has
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been added to shorewall.conf. MODULE_SUFFIX may be set to the suffix
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for module names in your particular distribution. If MODULE_SUFFIX is
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not set in shorewall.conf, Shorewall will use the list "o gz ko o.gz".<br>
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<br>
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To see what suffix is used by your distribution:<br>
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<br>
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ls /lib/modules/$(uname -r)/kernel/net/ipv4/netfilter<br>
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<br>
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All of the files listed should have the same suffix (extension). Set
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MODULE_SUFFIX to that suffix.<br>
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<br>
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Examples:<br>
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<br>
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If all files end in ".kzo" then set
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MODULE_SUFFIX="kzo"<br>
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If all files end in ".kz.o" then set
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MODULE_SUFFIX="kz.o"</li>
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<li>Support for user defined rule ACTIONS has been implemented
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through two new files:<br>
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<br>
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/etc/shorewall/actions - used to list the user-defined ACTIONS.<br>
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/etc/shorewall/action.template - For each user defined <action>,
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copy this file to /etc/shorewall/action.<action> and add the
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appropriate rules for that <action>. Once an <action> has
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been defined, it may be used like any of the builtin ACTIONS (ACCEPT,
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DROP, etc.) in /etc/shorewall/rules.<br>
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<br>
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Example: You want an action that logs a packet at the 'info' level and
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accepts the connection.<br>
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<br>
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In /etc/shorewall/actions, you would add:<br>
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<br>
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LogAndAccept<br>
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<br>
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You would then copy /etc/shorewall/action.template to
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/etc/shorewall/LogAndAccept and in that file, you would add the two
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rules:<br>
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LOG:info<br>
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ACCEPT<br>
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<br>
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</li>
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</ol>
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<p><b>12/03/2003 - Support Torch Passed</b><b> <img
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style="border: 0px solid ; width: 28px; height: 12px;"
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src="images/new10.gif" alt="(New)" title=""></b></p>
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Effective today, I am reducing my participation in the
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day-to-day support of Shorewall. As part of this shift to
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community-based Shorewall support a new <a
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href="https://lists.shorewall.net/mailman/listinfo/shorewall-newbies">Shorewall
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Newbies mailing list</a> has been established to field questions and
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problems from new users. I will not monitor that list personally. I
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will continue my active development of Shorewall
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and will be available via the development list to handle development
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issues -- Tom.
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<p><b>11/07/2003 - Shorewall 1.4.8</b><b><br>
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<br>
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</b>Problems Corrected since version 1.4.7:<br>
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</p>
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<ol>
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<li>Tuomo Soini has supplied a correction to a problem that
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occurs
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using some versions of 'ash'. The symptom is that "shorewall start"
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fails with:<br>
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<br>
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local: --limit: bad variable name<br>
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iptables v1.2.8: Couldn't load match
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`-j':/lib/iptables/libipt_-j.so:<br>
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cannot open shared object file: No such file or directory<br>
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Try `iptables -h' or 'iptables --help' for more
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information.</li>
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<li>Andres Zhoglo has supplied a correction that avoids trying
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to use the multiport match iptables facility on ICMP rules.<br>
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<br>
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Example of rule that previously caused "shorewall start"
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to fail:<br>
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<br>
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ACCEPT loc $FW
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icmp 0,8,11,12<br>
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<br>
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</li>
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<li>Previously, if the following error message was issued,
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Shorewall was left in an inconsistent state.<br>
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<br>
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Error: Unable to determine the routes through interface xxx<br>
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<br>
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</li>
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<li>Handling of the LOGUNCLEAN option in shorewall.conf has
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been corrected.</li>
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<li>In Shorewall 1.4.2, an optimization was added. This
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optimization
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involved creating a chain named "<zone>_frwd" for most zones
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defined using the /etc/shorewall/hosts file. It has since been
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discovered that in many cases these new chains contain redundant rules
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and that the "optimization" turns out to be less than optimal. The
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implementation has now been corrected.</li>
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<li>When the MARK value in a tcrules entry is followed by ":F"
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or
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":P", the ":F" or ":P" was previously only applied to the first
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Netfilter rule generated by the entry. It is now applied to all entries.</li>
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<li>An incorrect comment concerning Debian's use of the
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SUBSYSLOCK option has been removed from shorewall.conf.</li>
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<li>Previously, neither the 'routefilter' interface option nor
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the
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ROUTE_FILTER parameter were working properly. This has been corrected
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(thanks to Eric Bowles for his analysis and patch). The definition of
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the ROUTE_FILTER option has changed however. Previously,
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ROUTE_FILTER=Yes was documented as enabling route filtering on all
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interfaces (which didn't work). Beginning with this release, setting
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ROUTE_FILTER=Yes will enable route filtering of all interfaces brought
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up while Shorewall is started. As a consequence, ROUTE_FILTER=Yes can
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coexist with the use of the 'routefilter' option in the interfaces file.</li>
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<li>If MAC verification was enabled on an interface with a /32
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address and
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a broadcast address then an error would occur during startup.</li>
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<li>he NONE policy's intended use is to suppress the generating
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of
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rules that can't possibly be traversed. This means that a policy of
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NONE is inappropriate where the source or destination zone is $FW or
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"all". Shorewall now generates an error message if such a policy is
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given in /etc/shorewall/policy. Previously such a policy caused
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"shorewall start" to fail.</li>
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<li>The 'routeback' option was broken for wildcard interfaces
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(e.g.,
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"tun+"). This has been corrected so that 'routeback' now works as
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expected in this case.<br>
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</li>
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</ol>
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Migration Issues:<br>
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<ol>
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<li>The definition of the ROUTE_FILTER option in shorewall.conf
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has changed as described in item 8) above.<br>
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</li>
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</ol>
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New Features:<br>
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<ol>
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<li>A new QUEUE action has been introduced for rules. QUEUE
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allows
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you to pass connection requests to a user-space filter such as ftwall
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(http://p2pwall.sourceforge.net). The ftwall program
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allows for effective filtering of p2p applications such as Kazaa. For
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example, to use ftwall to filter P2P clients in the 'loc' zone, you
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would add the following rules:<br>
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<br>
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QUEUE loc
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net tcp<br>
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QUEUE loc
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net udp<br>
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QUEUE loc
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fw udp<br>
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<br>
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You would normally want to place those three rules BEFORE any ACCEPT
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rules for loc->net udp or tcp.<br>
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<br>
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Note: When the protocol specified is TCP ("tcp", "TCP" or "6"),
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Shorewall will only pass connection requests (SYN packets) to user
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space. This is for compatibility with ftwall.</li>
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<li>A BLACKLISTNEWNONLY option has been added to
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shorewall.conf. When this option is set to "Yes", the blacklists
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(dynamic and static) are only consulted for new connection requests.
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When set to "No" (the default if the variable is not set), the
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blacklists are consulted on every packet.<br>
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<br>
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Setting this option to "No" allows blacklisting to stop existing
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connections from a newly blacklisted host but is more expensive in
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terms of packet processing time. This is especially true if the
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blacklists contain a large number of entries.</li>
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<li>Chain names used in the /etc/shorewall/accounting file may
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now begin with a digit ([0-9]) and may contain embedded dashes ("-").</li>
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</ol>
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<p><b>10/26/2003 - Shorewall 1.4.7a and 1.4.7b win brown paper
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bag awards </b><b><img
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style="border: 0px solid ; width: 50px; height: 80px;"
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src="images/j0233056.gif" align="middle" title="" alt="">Shorewall
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1.4.7c released.</b> </p>
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<ol>
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<li>The saga with "<zone>_frwd" chains continues. The
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1.4.7c
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script produces a ruleset that should work for everyone even if it is
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not
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quite optimal. My apologies for this ongoing mess.<br>
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</li>
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</ol>
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<p><b>10/24/2003 - Shorewall 1.4.7b</b></p>
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<p>This is a bugfx rollup of the 1.4.7a fixes plus:<br>
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</p>
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<ol>
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<li>The fix for problem 5 in 1.4.7a was wrong with the result
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that
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"<zone>_frwd" chains might contain too few rules. That wrong code
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is corrected in this release.<br>
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</li>
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</ol>
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<p><b>10/21/2003 - Shorewall 1.4.7a</b></p>
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<p>This is a bugfix rollup of the following problem corrections:<br>
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</p>
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<ol>
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<li>Tuomo Soini has supplied a correction to a problem that
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|
occurs
|
|
using some versions of 'ash'. The symptom is that "shorewall start"
|
|
fails with:<br>
|
|
<br>
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|
local: --limit: bad variable name<br>
|
|
iptables v1.2.8: Couldn't load match
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`-j':/lib/iptables/libipt_-j.so:<br>
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cannot open shared object file: No such file or directory<br>
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Try `iptables -h' or 'iptables --help' for more
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information.<br>
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<br>
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</li>
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<li>Andres Zhoglo has supplied a correction that avoids trying
|
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to use the multiport match iptables facility on ICMP rules.<br>
|
|
<br>
|
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Example of rule that previously caused "shorewall start"
|
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to fail:<br>
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|
<br>
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|
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ACCEPT loc $FW
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icmp 0,8,11,12<br>
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<br>
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</li>
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<li>Previously, if the following error message was issued,
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Shorewall was left in an inconsistent state.<br>
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<br>
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Error: Unable to determine the routes through
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interface xxx<br>
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<br>
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</li>
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<li>Handling of the LOGUNCLEAN option in shorewall.conf has
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been corrected.</li>
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<li>In Shorewall 1.4.2, an optimization was added. This
|
|
optimization
|
|
involved creating a chain named "<zone>_frwd" for most zones
|
|
defined using the /etc/shorewall/hosts file. It has since been
|
|
discovered that in many cases these new chains contain redundant rules
|
|
and that the "optimization" turns out to be less than optimal. The
|
|
implementation has now been corrected.</li>
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<li>When the MARK value in a tcrules entry is followed by ":F"
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|
or
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":P", the ":F" or ":P" was previously only applied to the first
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Netfilter rule generated by the entry. It is now applied to all entries.<br>
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</li>
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</ol>
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<ol>
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</ol>
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<p><b></b></p>
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<ol>
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</ol>
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<p><a href="News.htm">More News</a></p>
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<p> <a href="http://leaf.sourceforge.net" target="_top"><img
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border="0" src="images/leaflogo.gif" width="49" height="36"
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alt="(Leaf Logo)"> </a>Jacques Nilo and Eric Wolzak have a LEAF
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(router/firewall/gateway on a floppy, CD or compact flash) distribution
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called <i>Bering</i> that features Shorewall-1.4.2 and Kernel-2.4.20.
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You can find their work at: <a
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href="http://leaf.sourceforge.net/devel/jnilo">
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http://leaf.sourceforge.net/devel/jnilo<br>
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</a></p>
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<b>Congratulations to Jacques and Eric on the recent release of
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Bering 1.2!!! <br>
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<br>
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</b>
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<div style="text-align: center;">
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<div style="text-align: center;"><a
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href="http://www.shorewall.net" target="_top"><img
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src="images/ProtectedBy.png" title="" alt="(Protected by Shorewall)"
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style="border: 0px solid ; width: 216px; height: 45px;"></a></div>
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</div>
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<h2><a name="Donations"></a>Donations</h2>
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<p style="text-align: left;"><a href="http://www.starlight.org"> <img
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style="border: 4px solid ; width: 57px; height: 100px;"
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src="images/newlog.gif" align="left" hspace="10" alt="(Starlight Logo)"
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title=""></a><br>
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<big>Shorewall is free but if you try it and find it useful,
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please consider making a donation to <a href="http://www.starlight.org">Starlight
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Children's Foundation</a>. Thanks!</big><br>
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<a href="http://www.starlight.org"> </a></p>
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</td>
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</tr>
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</tbody>
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</table>
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</center>
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</div>
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<p><font size="2">Updated 12/07/2003 - <a href="support.htm">Tom Eastep</a></font>
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<br>
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</p>
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</body>
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</html>
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