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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@959 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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@ -241,8 +241,8 @@
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<listitem>
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<listitem>
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<para>Locate the appropriate DNAT rule. It will be in a chain
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<para>Locate the appropriate DNAT rule. It will be in a chain
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called <emphasis><source zone></emphasis>_dnat
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called <emphasis><source zone></emphasis>_dnat (<quote>net_dnat</quote>
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('net_dnat' in the above examples).</para>
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in the above examples).</para>
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</listitem>
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</listitem>
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<listitem>
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<listitem>
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@ -702,21 +702,21 @@
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<section id="faq4">
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<section id="faq4">
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<title>(FAQ 4) I just used an online port scanner to check my firewall
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<title>(FAQ 4) I just used an online port scanner to check my firewall
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and it shows some ports as 'closed' rather than
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and it shows some ports as <quote>closed</quote> rather than
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'blocked'. Why?</title>
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<quote>blocked</quote>. Why?</title>
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<para><emphasis role="bold">Answer:</emphasis> The common.def included
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<para><emphasis role="bold">Answer:</emphasis> The common.def included
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with version 1.3.x always rejects connection requests on TCP port 113
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with version 1.3.x always rejects connection requests on TCP port 113
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rather than dropping them. This is necessary to prevent outgoing
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rather than dropping them. This is necessary to prevent outgoing
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connection problems to services that use the 'Auth' mechanism
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connection problems to services that use the <quote>Auth</quote>
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for identifying requesting users. Shorewall also rejects TCP ports 135,
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mechanism for identifying requesting users. Shorewall also rejects TCP
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137 and 139 as well as UDP ports 137-139. These are ports that are used
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ports 135, 137 and 139 as well as UDP ports 137-139. These are ports
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by Windows (Windows <emphasis>can</emphasis> be configured to use the
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that are used by Windows (Windows <emphasis>can</emphasis> be configured
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DCE cell locator on port 135). Rejecting these connection requests
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to use the DCE cell locator on port 135). Rejecting these connection
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rather than dropping them cuts down slightly on the amount of Windows
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requests rather than dropping them cuts down slightly on the amount of
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chatter on LAN segments connected to the Firewall.</para>
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Windows chatter on LAN segments connected to the Firewall.</para>
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<para>If you are seeing port 80 being 'closed', that's
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<para>If you are seeing port 80 being <quote>closed</quote>, that's
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probably your ISP preventing you from running a web server in violation
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probably your ISP preventing you from running a web server in violation
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of your Service Agreement.</para>
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of your Service Agreement.</para>
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@ -784,8 +784,8 @@
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</listitem>
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</listitem>
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</orderedlist>
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</orderedlist>
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<para>For a complete description of Shorewall 'ping' management,
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<para>For a complete description of Shorewall <quote>ping</quote>
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see <ulink url="ping.html">this page</ulink>.</para>
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management, see <ulink url="ping.html">this page</ulink>.</para>
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</section>
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</section>
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<section id="faq15">
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<section id="faq15">
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@ -962,11 +962,11 @@ run_iptables -A common -p udp --sport 53 -mstate --state NEW -j DROP</programlis
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<para><emphasis role="bold">Answer:</emphasis> If you are running
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<para><emphasis role="bold">Answer:</emphasis> If you are running
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Shorewall version 1.4.4 or 1.4.4a then check the <ulink url="errata.htm">errata</ulink>.
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Shorewall version 1.4.4 or 1.4.4a then check the <ulink url="errata.htm">errata</ulink>.
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Otherwise, see the 'dmesg' man page (<quote>man dmesg</quote>).
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Otherwise, see the <quote>dmesg</quote> man page (<quote>man dmesg</quote>).
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You must add a suitable 'dmesg' command to your startup scripts
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You must add a suitable <quote>dmesg</quote> command to your startup
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or place it in /etc/shorewall/start. Under RedHat, the max log level
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scripts or place it in /etc/shorewall/start. Under RedHat, the max log
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that is sent to the console is specified in /etc/sysconfig/init in the
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level that is sent to the console is specified in /etc/sysconfig/init in
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LOGLEVEL variable.</para>
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the LOGLEVEL variable.</para>
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</section>
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</section>
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<section id="faq17">
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<section id="faq17">
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@ -1195,8 +1195,8 @@ run_iptables -A common -p udp --sport 53 -mstate --state NEW -j DROP</programlis
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<para><emphasis role="bold">Answer:</emphasis> While most people
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<para><emphasis role="bold">Answer:</emphasis> While most people
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associate the Internet Control Message Protocol (ICMP) with
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associate the Internet Control Message Protocol (ICMP) with
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'ping', ICMP is a key piece of the internet. ICMP is used to
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<quote>ping</quote>, ICMP is a key piece of the internet. ICMP is used
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report problems back to the sender of a packet; this is what is
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to report problems back to the sender of a packet; this is what is
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happening here. Unfortunately, where NAT is involved (including SNAT,
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happening here. Unfortunately, where NAT is involved (including SNAT,
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DNAT and Masquerade), there are a lot of broken implementations. That is
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DNAT and Masquerade), there are a lot of broken implementations. That is
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what you are seeing with these messages.</para>
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what you are seeing with these messages.</para>
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@ -1463,13 +1463,13 @@ ip route add 127.0.0.0/8 dev lo table T2</programlisting>
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<title>Starting and Stopping</title>
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<title>Starting and Stopping</title>
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<section id="faq7">
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<section id="faq7">
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<title>(FAQ 7) When I stop Shorewall using 'shorewall stop', I
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<title>(FAQ 7) When I stop Shorewall using <quote>shorewall stop</quote>,
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can't connect to anything. Why doesn't that command work?</title>
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I can't connect to anything. Why doesn't that command work?</title>
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<para>The 'stop' command is intended to place your firewall into
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<para>The <quote>stop</quote> command is intended to place your firewall
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a safe state whereby only those hosts listed in
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into a safe state whereby only those hosts listed in
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/etc/shorewall/routestopped' are activated. If you want to totally
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/etc/shorewall/routestopped' are activated. If you want to totally
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open up your firewall, you must use the 'shorewall clear'
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open up your firewall, you must use the <quote>shorewall clear</quote>
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command.</para>
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command.</para>
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</section>
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</section>
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that the modules <quote>ip_conntrack_ftp</quote> and <quote>ip_nat_ftp</quote>
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that the modules <quote>ip_conntrack_ftp</quote> and <quote>ip_nat_ftp</quote>
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need to be loaded. Shorewall automatically loads these <quote>helper</quote>
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need to be loaded. Shorewall automatically loads these <quote>helper</quote>
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modules from /lib/modules/<<emphasis>kernel-version</emphasis>>/kernel/net/ipv4/netfilter/
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modules from /lib/modules/<<emphasis>kernel-version</emphasis>>/kernel/net/ipv4/netfilter/
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and you can determine if they are loaded using the 'lsmod'
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and you can determine if they are loaded using the <quote>lsmod</quote>
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command. The <<emphasis>kernel-version</emphasis>> may be obtained
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command. The <<emphasis>kernel-version</emphasis>> may be obtained
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by typing</para>
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by typing</para>
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