forked from extern/shorewall_code
cf710d08ea
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@2622 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
582 lines
21 KiB
XML
582 lines
21 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<article>
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<articleinfo>
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<title>Ports Required for Various Services/Applications</title>
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<authorgroup>
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<author>
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<firstname>Tom</firstname>
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<surname>Eastep</surname>
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</author>
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</authorgroup>
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<pubdate>2005-09-02</pubdate>
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<copyright>
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<year>2001-2005</year>
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<holder>Thomas M. Eastep</holder>
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</copyright>
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<legalnotice>
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<para>Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU Free Documentation License, Version
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1.2 or any later version published by the Free Software Foundation; with
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no Invariant Sections, with no Front-Cover, and with no Back-Cover
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Texts. A copy of the license is included in the section entitled
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<quote><ulink url="GnuCopyright.htm">GNU Free Documentation
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License</ulink></quote>.</para>
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</legalnotice>
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<abstract>
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<para>In addition to those applications described in the
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/etc/shorewall/rules documentation, here are some other
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services/applications that you may need to configure your firewall to
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accommodate.</para>
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</abstract>
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</articleinfo>
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<caution>
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<para><emphasis role="bold">This article applies to Shorewall 3.0 and
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later. If you are running a version of Shorewall earlier than Shorewall
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3.0.0 then please see the documentation for that release</emphasis></para>
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</caution>
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<section>
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<title>Important Notes</title>
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<note>
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<para> Shorewall distribution contains a library of user-defined macros
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that allow for easily allowing or blocking a particular application.
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Check your <filename>/usr/share/shorewall/actions.std</filename> file
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for a list of macros in your distribution. If you find what you need,
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you simply use the action in a rule. For example, to allow DNS queries
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from the <emphasis role="bold">dmz</emphasis> zone to the <emphasis
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role="bold">net</emphasis> zone:</para>
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<programlisting>#ACTION SOURCE DESTINATION
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DNS/ACCEPT dmz net</programlisting>
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</note>
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<note>
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<para>In the rules that are shown in this document, the ACTION is shown
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as ACCEPT. You may need to use DNAT (see <ulink url="FAQ.htm#faq30">FAQ
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30</ulink>) or you may want DROP or REJECT if you are trying to block
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the application.</para>
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<para>Example: You want to port forward FTP from the net to your server
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at 192.168.1.4 in your DMZ. The FTP section below gives you:</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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FTP/ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis></programlisting>
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<para>You would code your rule as follows:</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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FTP/DNAT net dmz:192.168.1.4 </programlisting>
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</note>
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</section>
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<section>
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<title>Auth (identd)</title>
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<caution>
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<para><emphasis role="bold"><emphasis>Now,It's 21 Century</emphasis> ,
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don't use identd in production anymore.</emphasis></para>
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</caution>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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Auth/ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis></programlisting>
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</section>
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<section>
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<title>DNS</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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DNS/ACCEPT <emphasis> <source></emphasis> <emphasis><destination></emphasis> </programlisting>
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<para>Note that if you are setting up a DNS server that supports recursive
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resolution, the server is the <<emphasis>destination</emphasis>> for
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resolution requests (from clients) and is also the
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<<emphasis>source</emphasis>> of recursive resolution requests
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(usually to other servers in the 'net' zone). So for example, if you have
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a public DNS server in your DMZ that supports recursive resolution for
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local clients then you would need:</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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DNS/ACCEPT all dmz
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DNS/ACCEPT dmz net </programlisting>
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<note>
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<para>Recursive Resolution means that if the server itself can't resolve
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the name presented to it, the server will attempt to resolve the name
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with the help of other servers.</para>
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</note>
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</section>
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<section id="Emule">
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<title>Emule</title>
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<para>In contrast to how the rest of this article is organized, for emule
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I will give you the rules necessary to run emule on a single machine in
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your loc network (since that's what 99.99% of you want to do). Assume
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that:</para>
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<orderedlist>
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<listitem>
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<para>The internal machine running emule has IP address
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192.168.1.4.</para>
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</listitem>
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<listitem>
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<para>You use Masquerading or SNAT for the local network.</para>
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</listitem>
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<listitem>
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<para>The zones are named as they are in the <ulink
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url="shorewall_quickstart_guide.htm">two- and three-interface
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QuickStart guides)</ulink>.</para>
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</listitem>
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<listitem>
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<para>Your loc->net policy is ACCEPT</para>
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</listitem>
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</orderedlist>
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<para><filename>/etc/shorewall/rules:</filename></para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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DNAT net loc:192.168.1.4 tcp 4662
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DNAT net loc:192.168.1.4 udp 4672
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DNAT net loc:192.168.1.4 tcp 4711</programlisting>
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</section>
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<section>
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<title>FTP</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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FTP/ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis></programlisting>
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<para>Look <ulink url="FTP.html">here</ulink> for much more
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information.</para>
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</section>
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<section>
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<title>ICQ/AIM</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ICQ/ACCEPT <emphasis><source></emphasis> net</programlisting>
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</section>
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<section>
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<title>IMAP</title>
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<caution>
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<para>When accessing you mail from the internet,use <emphasis
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role="bold">only</emphasis> <emphasis role="bold">IMAP over
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SSL</emphasis></para>
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</caution>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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IMAP/ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> #Secure & Unsecure IMAP</programlisting>
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</section>
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<section>
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<title>IPSEC</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis> <destination></emphasis> 50
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ACCEPT <emphasis><source></emphasis> <emphasis> <destination></emphasis> 51
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ACCEPT <emphasis><source></emphasis> <emphasis> <destination></emphasis> udp 500
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ACCEPT <emphasis><destination></emphasis> <emphasis><source></emphasis> 50
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ACCEPT <emphasis><destination></emphasis> <emphasis><source></emphasis> 51
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ACCEPT <emphasis><destination></emphasis> <emphasis><source></emphasis> udp 500</programlisting>
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<para>Lots more information <ulink url="IPSEC.htm">here</ulink> and <ulink
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url="VPN.htm">here</ulink>.</para>
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</section>
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<section>
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<title>NFS</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><z1></emphasis>:<list of client IPs> <emphasis> <z2></emphasis>:a.b.c.d tcp 111
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ACCEPT <emphasis><z1></emphasis>:<list of client IPs> <emphasis> <z2></emphasis>:a.b.c.d udp</programlisting>
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</section>
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<section>
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<title>NTP (Network Time Protocol)</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> udp 123</programlisting>
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</section>
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<section>
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<title><trademark>PCAnywhere</trademark></title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> udp 5632
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 5631</programlisting>
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</section>
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<section>
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<title>Pop3</title>
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<caution>
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<para>If Possible , <emphasis role="bold">Avoid this protocol</emphasis>
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, use <emphasis role="bold">IMAP</emphasis> instead.</para>
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</caution>
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<para>TCP Port 110 (Secure Pop3 is TCP Port 995)</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 110 #Unsecure Pop3
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 995 #Secure Pop3</programlisting>
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</section>
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<section>
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<title>PPTP</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> 47
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 1723</programlisting>
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<para>Lots more information <ulink url="PPTP.htm">here</ulink> and <ulink
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url="VPN.htm">here</ulink>.</para>
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</section>
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<section>
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<title>rdate</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 37</programlisting>
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</section>
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<section>
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<title>rsync</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 873</programlisting>
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</section>
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<section>
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<title>SSH/SFTP</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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SSH/ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> </programlisting>
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</section>
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<section>
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<title>SMB/NMB (Samba/Windows Browsing/File Sharing)</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis> <destination></emphasis> tcp 137,139,445
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ACCEPT <emphasis><source></emphasis> <emphasis> <destination></emphasis> udp 137:139
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ACCEPT <emphasis><destination></emphasis> <emphasis><source></emphasis> tcp 137,139,445
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ACCEPT <emphasis><destination></emphasis> <emphasis><source></emphasis> udp 137:139</programlisting>
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<para>Also, see <ulink url="samba.htm">this page</ulink>.</para>
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</section>
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<section>
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<title>SMTP</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 25 #Insecure SMTP
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 465 #SMTP over SSL (TLS)</programlisting>
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</section>
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<section>
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<title>SNMP</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> udp 161:162
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 161</programlisting>
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</section>
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<section>
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<title>Telnet</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 23</programlisting>
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</section>
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<section>
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<title>TFTP</title>
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<para>You must have TFTP connection tracking support in your kernel. If
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modularized, the modules are <emphasis
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role="bold">ip_conntrack_tftp</emphasis> (and <emphasis
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role="bold">ip_nat_tftp</emphasis> if any form of NAT is involved) These
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modules may be loaded using entries in
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<filename>/etc/shorewall/modules</filename>. The <emphasis
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role="bold">ip_conntrack_tftp</emphasis> module must be loaded first. Note
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that the <filename>/etc/shorewall/modules</filename> file released with
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recent Shorewall versions contains entries for these modules.</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> udp 69</programlisting>
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</section>
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<section>
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<title>Traceroute</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> udp 33434:33443 #Good for 10 hops
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> icmp 8</programlisting>
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<para>UDP traceroute uses ports 33434 through 33434+<max number of
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hops>-1. Note that for the firewall to respond with a TTL expired ICMP
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reply, you will need to allow ICMP 11 outbound from the firewall. The
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standard Shorewall sample configurations all set this up for you
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automatically since those sample configurations enable all ICMP packet
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types originating on the firewall itself.</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT fw net icmp
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ACCEPT fw loc icmp
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ACCEPT fw ...</programlisting>
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</section>
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<section>
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<title>Usenet (NNTP)</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 119</programlisting>
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<para>TCP Port 119</para>
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</section>
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<section>
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<title>VNC</title>
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<para>Vncviewer to Vncserver -- TCP port 5900 + <display
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number>.</para>
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<para>Vncviewer to Vncserver -- TCP port 5900 + <display
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number>.</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 5901 #Display Number 1
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 5902 #Display Number 2
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...</programlisting>
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<para>Vncserver to Vncviewer in listen mode -- TCP port 5500.</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 5500</programlisting>
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</section>
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<section>
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<title><trademark>Vonage</trademark></title>
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<para>The standard Shorewall loc->net ACCEPT policy is all that is
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required for <trademark>Vonage</trademark> IP phone service to work,
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provided that you have loaded the tftp helper modules (add the following
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entries to /etc/shorewall/modules if they are not there already):</para>
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<programlisting> loadmodule ip_conntrack_tftp
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loadmodule ip_nat_tftp</programlisting>
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</section>
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<section>
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<title>Web Access</title>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 80 #Insecure HTTP
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ACCEPT <emphasis><source></emphasis> <emphasis><destination></emphasis> tcp 443 #Secure HTTP</programlisting>
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</section>
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<section>
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<title>X/XDMCP</title>
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<para>Assume that the Choser and/or X Server are running at
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<<emphasis>chooser</emphasis>> and the Display Manager/X
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applications are running at <<emphasis>apps</emphasis>>.</para>
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<programlisting>#ACTION SOURCE DESTINATION PROTO DEST PORT(S)
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ACCEPT <<emphasis>chooser</emphasis>> <<emphasis>apps</emphasis>> udp 177 #XDMCP
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ACCEPT <<emphasis>apps</emphasis>> <<emphasis>chooser</emphasis>> tcp 6000:6009 #X Displays 0-9</programlisting>
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</section>
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<section>
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<title>Other Source of Port Information</title>
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<para>Didn't find what you are looking for -- have you looked in your own
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/etc/services file?</para>
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<para>Still looking? Try <ulink
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url="http://www.networkice.com/advice/Exploits/Ports">http://www.networkice.com/advice/Exploits/Ports</ulink></para>
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</section>
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<appendix>
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<title>Revision History</title>
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<para><revhistory>
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<revision>
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<revnumber>1.16</revnumber>
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<date>2005-09-02</date>
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<authorinitials>CR</authorinitials>
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|
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<revremark>Updated for Shorewall v3.0</revremark>
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</revision>
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<revision>
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<revnumber>1.15</revnumber>
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<date>2005-05-02</date>
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<authorinitials>TE</authorinitials>
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<revremark>Added Emule</revremark>
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</revision>
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<revision>
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<revnumber>1.14</revnumber>
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<date>2004-10-01</date>
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<authorinitials>TE</authorinitials>
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<revremark>Add rsync.</revremark>
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</revision>
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<revision>
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<revnumber>1.13</revnumber>
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<date>2004-09-21</date>
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<authorinitials>TE</authorinitials>
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<revremark>Add note about ICMP type 11 to Traceroute.</revremark>
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</revision>
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<revision>
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<revnumber>1.12</revnumber>
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<date>2004-09-09</date>
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<authorinitials>TE</authorinitials>
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<revremark>Add note about <trademark>Vonage</trademark>.</revremark>
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</revision>
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<revision>
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<revnumber>1.11</revnumber>
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<date>2004-05-28</date>
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<authorinitials>TE</authorinitials>
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<revremark>Corrected directory for actions.std and enhanced the DNS
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section.</revremark>
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</revision>
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<revision>
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<revnumber>1.10</revnumber>
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<date>2004-05-09</date>
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<authorinitials>TE</authorinitials>
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<revremark>Added TFTP.</revremark>
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</revision>
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<revision>
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<revnumber>1.9</revnumber>
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<date>2004-04-24</date>
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<authorinitials>TE</authorinitials>
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|
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<revremark>Revised ICQ/AIM.</revremark>
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</revision>
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|
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|
<revision>
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|
<revnumber>1.8</revnumber>
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|
|
|
<date>2004-04-23</date>
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|
|
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<authorinitials>TE</authorinitials>
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|
|
|
<revremark>Added SNMP.</revremark>
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</revision>
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|
|
|
<revision>
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|
<revnumber>1.7</revnumber>
|
|
|
|
<date>2004-02-18</date>
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|
|
|
<authorinitials>TE</authorinitials>
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|
|
|
<revremark>Make NFS work for everyone.</revremark>
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|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.6</revnumber>
|
|
|
|
<date>2004-02-14</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Add PCAnywhere.</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.5</revnumber>
|
|
|
|
<date>2004-02-05</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Added information about VNC viewers in listen
|
|
mode.</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.4</revnumber>
|
|
|
|
<date>2004-01-26</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Correct ICQ.</revremark>
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|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.3</revnumber>
|
|
|
|
<date>2004-01-04</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Alphabetize</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.2</revnumber>
|
|
|
|
<date>2004-01-03</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Add rules file entries.</revremark>
|
|
</revision>
|
|
|
|
<revision>
|
|
<revnumber>1.1</revnumber>
|
|
|
|
<date>2002-07-30</date>
|
|
|
|
<authorinitials>TE</authorinitials>
|
|
|
|
<revremark>Initial version converted to Docbook XML</revremark>
|
|
</revision>
|
|
</revhistory></para>
|
|
</appendix>
|
|
</article> |