forked from extern/shorewall_code
More documentation
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Tom Eastep
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93babf6577
@ -178,7 +178,7 @@ None.
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Example:
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IPMASK(dst, 0XFF00, 0x8000,8)
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IPMARK(dst, 0XFF00, 0x8000,8)
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Destination IP address is 192.168.4.3 = 0xc0a80103
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@ -1,4 +1,6 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
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<refentry>
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<refmeta>
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<refentrytitle>shorewall-tcclasses</refentrytitle>
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@ -286,6 +288,41 @@
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</note>
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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">occurs</emphasis>=<emphasis>number</emphasis></term>
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<listitem>
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<para>Typically used with an IPMARK entry in tcrules. Causes
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the rule to be replicated for a total of
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<emphasis>number</emphasis> rules. Each rule has a
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successively class number and mark value.</para>
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<para> When 'occurs' is used:</para>
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<itemizedlist>
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<listitem>
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<para>The associated device may not have the 'classify'
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option.</para>
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</listitem>
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<listitem>
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<para>The class may not be the default class.</para>
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</listitem>
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<listitem>
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<para>The class may not have any 'tos=' options (including
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'tcp-ack').</para>
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</listitem>
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</itemizedlist>
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<para>The 'RATE' and 'CEIL' parameters apply to each instance
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of the class. So the total RATE represented by an entry with
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'occurs' will be the listed RATE multiplied by
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<emphasis>number</emphasis>. </para>
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</listitem>
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</varlistentry>
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</variablelist>
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</listitem>
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</varlistentry>
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@ -365,4 +402,4 @@
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shorewall.conf(5), shorewall-tcdevices(5), shorewall-tcrules(5),
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shorewall-tos(5), shorewall-tunnels(5), shorewall-zones(5)</para>
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</refsect1>
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</refentry>
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</refentry>
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@ -50,7 +50,9 @@
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role="bold">SAVE</emphasis>[<emphasis
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role="bold">/</emphasis><emphasis>mask</emphasis>]|<emphasis
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role="bold">CONTINUE</emphasis>|SAME|<emphasis
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role="bold">COMMENT</emphasis>}[<emphasis
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role="bold">COMMENT</emphasis>|IPMARK[([(<emphasis
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role="bold">src</emphasis>|<emphasis
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role="bold">dst</emphasis>}][,[<emphasis>mask1</emphasis>][,[<emphasis>mask2</emphasis>][,[<emphasis>shift</emphasis>]]]]])]}[<emphasis
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role="bold">:</emphasis>{<emphasis role="bold">C</emphasis>|<emphasis
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role="bold">F</emphasis>|<emphasis role="bold">P</emphasis>|<emphasis
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role="bold">T</emphasis>|<emphasis role="bold">CF</emphasis>|<emphasis
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@ -224,7 +226,7 @@
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<listitem>
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<para><emphasis role="bold">CONTINUE</emphasis> Don't process
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any more marking rules in the table.</para>
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any more marking rules ‒in the table.</para>
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<para>As in 1) above, may be followed by <emphasis
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role="bold">:P</emphasis> or <emphasis
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@ -250,7 +252,7 @@ SAME:P 192.168.1.0/24 0.0.0.0/0 tcp 80,443</programlisting>
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If a host in 192.168.1.0/24 attempts a connection on TCP port 80
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or 443 and it has sent a packet on either of those ports in the
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last five minutes then the new connection will use the same
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provider as the connection over which that last packet was
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provider as the connection over which that ‒‒last packet was
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sent.</para>
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<para>When used in the OUTPUT chain, it causes all matching
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@ -262,7 +264,7 @@ SAME $FW 0.0.0.0/0 tcp 80,443</programlisting>
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it has sent a packet on either of those ports in the last five
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minutes to the same remote system then the new connection will
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use the same provider as the connection over which that last
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packet was sent. </para>
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packet was sent.</para>
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</listitem>
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<listitem>
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@ -275,6 +277,52 @@ SAME $FW 0.0.0.0/0 tcp 80,443</programlisting>
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<para>To stop the comment from being attached to further rules,
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simply include COMMENT on a line by itself.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">IPMARK</emphasis> ‒ Assigns a mark
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to each matching packet based on the either the source or
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destination IP address. By default, it assigns a mark value
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equal to the low-order 8 bits of the source address. Default
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values are: </para>
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<simplelist>
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<member>src</member>
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<member><emphasis>mask1</emphasis> = 0xFF</member>
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<member><emphasis>mask2</emphasis> = 0x00</member>
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<member><emphasis>shift</emphasis> = 0</member>
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</simplelist>
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<para>'src' and 'dst' specify whether the mark is to be based on
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the source or destination address respectively. The selected
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address is first LANDed with <emphasis>mask1</emphasis> then
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LORed with <emphasis>ma<emphasis>s</emphasis>k2</emphasis>. The
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result is then shifted <emphasis>shift</emphasis> bits to the
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right.</para>
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<para>Example:</para>
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<blockquote>
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<para><simplelist>
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<member>IPMARK(dst, 0XFF00, 0x8000,8)</member>
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<member>Destination IP address is 192.168.4.3 =
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0xc0a80103</member>
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</simplelist>Meaning:</para>
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<simplelist>
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<member>0xc0a80403 LAND 0xFF00 = 0x0400</member>
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<member>0x0400 LOR 0x80 = 0x8400</member>
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<member>0x8400 >> 8 = 0x84</member>
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<member>Mark = 0x84 = 132 </member>
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</simplelist>
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</blockquote>
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</listitem>
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</orderedlist>
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</listitem>
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</varlistentry>
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