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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@4954 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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@ -36,6 +36,53 @@
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<para>The following options may be set in shorewall.conf.</para>
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<variablelist>
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<varlistentry>
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<term><emphasis role="bold">ADD_IP_ALIASES=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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<listitem>
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<para>This parameter determines whether Shorewall automatically adds
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the external address(es) in shorewall.nat(5). If the variable is set
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to <emphasis role="bold">Yes</emphasis> or <emphasis
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role="bold">yes</emphasis> then Shorewall automatically adds these
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aliases. If it is set to <emphasis role="bold">No</emphasis> or
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<emphasis role="bold">no</emphasis>, you must add these aliases
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yourself using your distribution's network configuration
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tools.</para>
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<para>If this variable is not set or is given an empty value
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(ADD_IP_ALIASES="") then ADD_IP_ALIASES=Yes is assumed.</para>
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<warning>
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<para> Addresses added by ADD_IP_ALIASES=Yes are deleted and
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re-added during shorewall restart. As a consequence, connections
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using those addresses may be severed.</para>
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</warning>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">ADD_SNAT_ALIASES=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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<listitem>
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<para>This parameter determines whether Shorewall automatically adds
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the SNAT ADDRESS in /etc/shorewall/masq. If the variable is set to
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“Yes” or “yes” then Shorewall automatically adds these addresses. If
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it is set to “No” or “no”, you must add these addresses yourself
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using your distribution's network configuration tools.</para>
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<para>If this variable is not set or is given an empty value
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(ADD_SNAT_ALIASES="") then ADD_SNAT_ALIASES=No is assumed.</para>
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<warning>
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<para>Addresses added by ADD_SNAT_ALIASES=Yes are deleted and
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re-added during shorewall restart. As a consequence, connections
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using those addresses may be severed.</para>
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</warning>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">ADMINISABSENTMINDED=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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@ -116,6 +163,20 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">DETECT_DNAT_ADDRS=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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<listitem>
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<para>If set to “Yes” or “yes”, Shorewall will detect the first IP
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address of the interface to the source zone and will include this
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address in DNAT rules as the original destination IP address. If set
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to “No” or “no”, Shorewall will not detect this address and any
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destination IP address will match the DNAT rule. If not specified or
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empty, “DETECT_DNAT_ADDRS=Yes” is assumed.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">DYNAMIC_ZONES=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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@ -211,6 +272,52 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">IP_FORWARDING=</emphasis>{<emphasis
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role="bold">On</emphasis>|<emphasis
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role="bold">Off</emphasis>|<emphasis
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role="bold">Keep</emphasis>}</term>
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<listitem>
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<para>This parameter determines whether Shorewall enables or
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disables IPV4 Packet Forwarding (/proc/sys/net/ipv4/ip_forward).
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Possible values are:</para>
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<variablelist>
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<varlistentry>
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<term><emphasis role="bold">On</emphasis> or <emphasis
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role="bold">on</emphasis></term>
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<listitem>
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<para>packet forwarding will be enabled.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">Off</emphasis> or <emphasis
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role="bold">off</emphasis></term>
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<listitem>
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<para>packet forwarding will be disabled.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">Keep</emphasis> or <emphasis
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role="bold">keep</emphasis></term>
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<listitem>
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<para>Shorewall will neither enable nor disable packet
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forwarding.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>If this variable is not set or is given an empty value
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(IP_FORWARD="") then IP_FORWARD=On is assumed.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">IPTABLES=</emphasis><emphasis>pathname</emphasis></term>
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@ -223,6 +330,21 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">LOG_MARTIANS=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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<listitem>
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<para>If set to Yes or yes, sets
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/proc/sys/net/ipv4/conf/all/log_martians and
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/proc/sys/net/ipv4/conf/default/log_martians to 1. Default is which
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sets both of the above to zero. If you do not enable martian logging
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for all interfaces, you may still enable it for individual
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interfaces using the logmartians interface option in
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shorewall-interfaces(5).</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">LOGALLNEW=</emphasis><emphasis>log-level</emphasis></term>
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@ -244,11 +366,11 @@
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</listitem>
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</itemizedlist>
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<para>Example: Using the default LOGFORMAT, the log prefix for
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<para>For example, using the default LOGFORMAT, the log prefix for
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logging from the nat table's PREROUTING chain is:</para>
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<programlisting> Shorewall:nat:PREROUTING
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</programlisting>
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</programlisting>
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<important>
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<para>There is no rate limiting on these logging rules so use
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@ -264,6 +386,21 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">LOGFILE=</emphasis><emphasis>pathname</emphasis></term>
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<listitem>
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<para>This parameter tells the /sbin/shorewall program where to look
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for Shorewall messages when processing the <emphasis
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role="bold">dump</emphasis>, <emphasis
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role="bold">logwatch</emphasis>, <emphasis role="bold">show
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log</emphasis>, and <emphasis role="bold">hits</emphasis> commands.
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If not assigned or if assigned an empty value, /var/log/messages is
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assumed.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">LOGFORMAT="</emphasis><emphasis>formatstring</emphasis><emphasis
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@ -286,6 +423,45 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">LOGBURST=</emphasis><emphasis>burst</emphasis></term>
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<listitem>
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<para></para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">LOGRATE=</emphasis><emphasis>rate</emphasis><emphasis
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role="bold">/</emphasis>{<emphasis
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role="bold">minute</emphasis>|<emphasis
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role="bold">second</emphasis>}</term>
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<listitem>
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<para>These parameters set the match rate and initial burst size for
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logged packets. Please see the iptables man page for a description
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of the behavior of these parameters (the iptables option --limit is
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set by LOGRATE and --limit-burst is set by LOGBURST). If both
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parameters are set empty, no rate-limiting will occur.</para>
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<para>Example:</para>
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<programlisting> LOGRATE=10/minute
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LOGBURST=5</programlisting>
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<para>For each logging rule, the first time the rule is reached, the
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packet will be logged; in fact, since the burst is 5, the first five
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packets will be logged. After this, it will be 6 seconds (1 minute
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divided by the rate of 10) before a message will be logged from the
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rule, regardless of how many packets reach it. Also, every 6 seconds
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which passes without matching a packet, one of the bursts will be
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regained; if no packets hit the rule for 30 seconds, the burst will
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be fully recharged; back where we started.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">MACLIST_DISPOSITION=</emphasis>{<emphasis
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role="bold">ACCEPT</emphasis>|<emphasis
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@ -302,6 +478,18 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">MACLIST_LOG_LEVEL=</emphasis>[<emphasis>log-level</emphasis>]</term>
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<listitem>
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<para>Determines the syslog level for logging connection requests
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that fail MAC Verification. The value must be a valid syslogd log
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level. If you don't want to log these connection requests, set to
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the empty value (e.g., MACLIST_LOG_LEVEL="").</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">MACLIST_TABLE=</emphasis>{<emphasis
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role="bold">mangle</emphasis>|<emphasis
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@ -371,7 +559,8 @@
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</varlistentry>
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<varlistentry>
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<term>MODULE_SUFFIX="<emphasis role="bold">suffix</emphasis>
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<term><emphasis
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role="bold">MODULE_SUFFIX=</emphasis>"<emphasis>suffix</emphasis>
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...<emphasis role="bold">"</emphasis></term>
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<listitem>
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@ -381,6 +570,34 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">MODULESDIR=</emphasis><emphasis>pathname</emphasis>[<emphasis
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role="bold">:</emphasis><emphasis>pathname</emphasis>]...</term>
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<listitem>
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<para>This parameter specifies the directory/directories where your
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kernel netfilter modules may be found. If you leave the variable
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empty, Shorewall will supply the value "/lib/modules/`uname
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-r`/kernel/net/ipv4/netfilter" in versions of Shorewall prior to
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3.2.4 and "/lib/modules/`uname
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-r`/kernel/net/ipv4/netfilter:/lib/modules/`uname
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-r`/kernel/net/ipv4/netfilter" in later versions.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">NAT_BEFORE_RULES=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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<listitem>
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<para>If set to “No” or “no”, port forwarding rules can override the
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contents of the /etc/shorewall/nat file. If set to “Yes” or “yes”,
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port forwarding rules cannot override one-to-one NAT. If not set or
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set to an empty value, “Yes” is assumed.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">PKTTYPE=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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@ -423,6 +640,26 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">RETAIN_ALIASES=</emphasis>{<emphasis
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role="bold">Yes</emphasis>|<emphasis role="bold">No</emphasis>}</term>
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<listitem>
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<para>During <emphasis role="bold">shorewall star</emphasis>t, IP
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addresses to be added as a consequence of ADD_IP_ALIASES=Yes and
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ADD_SNAT_ALIASES=Yes are quietly deleted when shorewall-nat(5) and
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shorewall-masq(5) are processed then are re-added later. This is
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done to help ensure that the addresses can be added with the
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specified labels but can have the undesirable side effect of causing
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routes to be quietly deleted. When RETAIN_ALIASES is set to Yes,
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existing addresses will not be deleted. Regardless of the setting of
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RETAIN_ALIASES, addresses added during <emphasis
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role="bold">shorewall start</emphasis> are still deleted at a
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subsequent <emphasis role="bold">shorewall stop</emphasis> or
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<emphasis role="bold">shorewall restart</emphasis>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">RFC1918_LOG_LEVEL=</emphasis><emphasis>log-level</emphasis></term>
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@ -505,6 +742,20 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">SUBSYSLOCK=</emphasis><emphasis>pathname</emphasis></term>
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<listitem>
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<para>This parameter should be set to the name of a file that the
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firewall should create if it starts successfully and remove when it
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stops. Creating and removing this file allows Shorewall to work with
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your distribution's initscripts. For RedHat, this should be set to
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/var/lock/subsys/shorewall. For Debian, the value is
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/var/state/shorewall and in LEAF it is /var/run/shorwall.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis
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role="bold">TCP_FLAGS_DISPOSITION=</emphasis>{<emphasis
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