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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@838 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
521 lines
18 KiB
HTML
521 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 name="generator" content="HTML Tidy, see www.w3.org">
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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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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<center>
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<table border="0" cellpadding="0" cellspacing="0" style=
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"border-collapse: collapse;" width="100%" 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
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ftp.shorewall.net is currently down. Until it is back up, a small
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server with very limited bandwidth is being used temporarly. You
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will likely experience better response time from the <a href=
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"http://shorewall.sourceforge.net" target="_top">Sourceforge
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site</a> or from one of the other <a href=
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"shorewall_mirrors.htm">mirrors</a>. Sorry for the
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inconvenience.<br>
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<br>
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<h2>Introduction<br>
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</h2>
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<ul>
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<li><a href="http://www.netfilter.org">Netfilter</a> - the packet
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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 Linux
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kernels. Also the name of the utility program used to configure and
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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 control
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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).<br>
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</li>
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</ul>
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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
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configuration files. Shorewall reads those configuration files and
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with the help of the iptables utility, Shorewall configures
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Netfilter to match your requirements. Shorewall can be used on a
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dedicated firewall system, a multi-function gateway/router/server
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or on a standalone GNU/Linux system. Shorewall does not use
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Netfilter's ipchains compatibility mode and can thus take advantage
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of Netfilter's connection state tracking capabilities.
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<p>This program is free software; you can redistribute it and/or
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modify it under the terms of <a href=
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"http://www.gnu.org/licenses/gpl.html">Version 2 of the GNU General
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Public License</a> as published by the Free Software
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Foundation.<br>
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<br>
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This program is distributed in the hope that it will be useful, but
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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 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
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along with this program; if not, write to the Free Software
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Foundation, Inc., 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></p>
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<h2>This is the Shorewall 1.4 Web Site</h2>
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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" target=
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"_top">here.</a></li>
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<li>The 1.2 site is <a href="http://shorewall.net/1.2/" target=
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"_top">here</a>.<br>
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</li>
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</ul>
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<h2>Getting Started with Shorewall</h2>
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New to Shorewall? Start by selecting the <a href=
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"shorewall_quickstart_guide.htm">QuickStart Guide</a> that most
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closely match your environment and follow the step by step
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instructions.<br>
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<h2>Looking for Information?</h2>
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The <a href=
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"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
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frame above.
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<h2>Running Shorewall on Mandrake with a two-interface setup?</h2>
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If so, the documentation <b></b>on this site will not apply
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directly to your setup. If you want to use the documentation that
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you find here, you will want to consider uninstalling what you have
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and installing a setup that matches the documentation on this site.
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See the <a href="two-interface.htm">Two-interface QuickStart
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Guide</a> for details.
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<h2><b>News</b></h2>
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<p><b>12/07/2003 - Shorewall 1.4.9 Beta 1</b> <b><img style=
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"border: 0px solid ; width: 28px; height: 12px;" src=
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"images/new10.gif" alt="(New)" title=""><br>
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</b></p>
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<div style="margin-left: 40px;"><a href=
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"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=
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"_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
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confusion, all instances of "Static NAT" have been replaced with
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"One-to-one NAT" 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) will
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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
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rules now simply skips those (SOURCE,DEST) pairs that have a NONE
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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 rather
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than stealthed?" questions, the SMB-related rules in
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/etc/shorewall/common.def have been changed from 'reject' to
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'DROP'.</li>
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<li>For easier identification, packets logged under the 'norfc1918'
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interface option are now logged out of chains named 'rfc1918'.
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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 new
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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
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has been added to shorewall.conf. MODULE_SUFFIX may be set to the
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suffix for module names in your particular distribution. If
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MODULE_SUFFIX is not set in shorewall.conf, Shorewall will use the
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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).
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Set 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
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<action>, copy this file to
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/etc/shorewall/action.<action> and add the appropriate rules
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for that <action>. Once an <action> has been defined,
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it may be used like any of the builtin ACTIONS (ACCEPT, DROP, etc.)
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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
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and 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</li>
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</ol>
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<p><b>12/03/2003 - Support Torch Passed</b> <b><img style=
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"border: 0px solid ; width: 28px; height: 12px;" src=
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"images/new10.gif" alt="(New)" title=""></b></p>
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Effective today, I am reducing my participation in the day-to-day
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support of Shorewall. As part of this shift to community-based
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Shorewall support a new <a href=
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"https://lists.shorewall.net/mailman/listinfo/shorewall-newbies">Shorewall
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Newbies mailing list</a> has been established to field questions
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and problems from new users. I will not monitor that list
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personally. I will continue my active development of Shorewall and
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will be available via the development list to handle development
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issues -- Tom.
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<p><b>11/01/2003 - Shorewall 1.4.8 RC2</b> <b><img style=
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"border: 0px solid ; width: 28px; height: 12px;" src=
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"images/new10.gif" alt="(New)" title=""></b> <b></b></p>
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Given the small number of new features and the relatively few lines
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of code that were changed, there will be no Beta for 1.4.8.<br>
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<p><b><a href=
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"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=
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"_top">ftp://shorewall.net/pub/shorewall/Beta</a><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 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
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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 to
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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
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start" 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
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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 been
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corrected.</li>
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<li>In Shorewall 1.4.2, an optimization was added. This
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optimization involved creating a chain named "<zone>_frwd"
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for most zones defined using the /etc/shorewall/hosts file. It has
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since been discovered that in many cases these new chains contain
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redundant rules and that the "optimization" turns out to be less
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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" 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
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entries.</li>
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<li>An incorrect comment concerning Debian's use of the SUBSYSLOCK
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option has been removed from shorewall.conf.</li>
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<li>Previously, neither the 'routefilter' interface option nor the
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ROUTE_FILTER parameter were working properly. This has been
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corrected (thanks to Eric Bowles for his analysis and patch). The
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definition of the ROUTE_FILTER option has changed however.
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Previously, ROUTE_FILTER=Yes was documented as enabling route
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filtering on all interfaces (which didn't work). Beginning with
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this release, setting ROUTE_FILTER=Yes will enable route filtering
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of all interfaces brought up while Shorewall is started. As a
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consequence, ROUTE_FILTER=Yes can coexist with the use of the
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'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 a broadcast address then an error would occur during
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startup.</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 has
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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 allows
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you to pass connection requests to a user-space filter such as
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ftwall (http://p2pwall.sourceforge.net). The ftwall program allows
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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
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ACCEPT 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 shorewall.conf.
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When this option is set to "Yes", the blacklists (dynamic and
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static) are only consulted for new connection requests. When set to
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"No" (the default if the variable is not set), the blacklists are
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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 now
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begin with a digit ([0-9]) and may contain embedded dashes
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("-").</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 bag
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awards</b> <b><img style=
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"border: 0px solid ; width: 50px; height: 80px;" src=
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"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 1.4.7c
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script produces a ruleset that should work for everyone even if it
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is not quite optimal. My apologies for this ongoing mess.</li>
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</ol>
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<p><b>10/24/2003 - Shorewall 1.4.7b</b> <b><img style=
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"border: 0px solid ; width: 28px; height: 12px;" src=
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"images/new10.gif" alt="(New)" title=""></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 that
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"<zone>_frwd" chains might contain too few rules. That wrong
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code 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
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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 occurs
|
|
using some versions of 'ash'. The symptom is that "shorewall start"
|
|
fails with:<br>
|
|
<br>
|
|
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
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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 to
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use the multiport match iptables facility on ICMP rules.<br>
|
|
<br>
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Example of rule that previously caused "shorewall
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|
start" 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
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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 been
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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" 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
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entries.</li>
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</ol>
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<p><b><a href="News.htm">More News</a></b></p>
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<b></b>
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<h2><b></b></h2>
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<b></b>
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<p><a href="http://leaf.sourceforge.net" target="_top"><img border=
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"0" src="images/leaflogo.gif" width="49" height="36" alt=
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"(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)
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distribution called <i>Bering</i> that features Shorewall-1.4.2 and
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Kernel-2.4.20. You can find their work at: <a href=
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"http://leaf.sourceforge.net/devel/jnilo">http://leaf.sourceforge.net/devel/jnilo</a></p>
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<b>Congratulations to Jacques and Eric on the recent release of
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Bering 1.2!!!</b> <br>
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<h1 align="center"><b><a href="http://www.sf.net"><img align="left"
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alt="SourceForge Logo" src=
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"http://sourceforge.net/sflogo.php?group_id=22587&type=3">
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</a></b></h1>
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<b></b>
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<h4><b></b></h4>
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<b></b>
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<h2><b>This site is hosted by the generous folks at <a href=
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"http://www.sf.net">SourceForge.net</a></b></h2>
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<br>
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<br>
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<h2><b><a name="Donations"></a>Donations</b></h2>
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<b></b></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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<table border="0" cellpadding="5" cellspacing="0" style=
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"border-collapse: collapse; width: 100%; background-color: rgb(51, 102, 255);"
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id="AutoNumber2">
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<tbody>
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<tr>
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<td style="width: 100%; margin-top: 1px;">
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<p align="center"><a href="http://www.starlight.org"><img border=
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"4" src="images/newlog.gif" width="57" height="100" align="left"
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hspace="10" alt="Starlight Foundation Logo"></a></p>
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<p align="center"><font size="4" color="#ffffff"><br>
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<font size="+2">Shorewall is free but if you try it and find it
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useful, please consider making a donation to <a href=
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"http://www.starlight.org"><font color="#ffffff">Starlight
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Children's Foundation.</font></a> Thanks!</font></font></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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<p><font size="2">Updated 12/07/2003 - <a href="support.htm">Tom
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Eastep</a></font><br>
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</p>
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</body>
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</html>
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