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208 lines
8.0 KiB
XML
208 lines
8.0 KiB
XML
<?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-netmap</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>netmap</refname>
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<refpurpose>Shorewall NETMAP definition file</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>/etc/shorewall/netmap</command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>This file is used to map addresses in one network to corresponding
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addresses in a second network.</para>
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<warning>
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<para>To use this file, your kernel and iptables must have NETMAP
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support included.</para>
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</warning>
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<para>The columns in the file are as follows (where the column name is
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followed by a different name in parentheses, the different name is used in
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the alternate specification syntax).</para>
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<variablelist>
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<varlistentry>
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<term><emphasis role="bold">TYPE</emphasis> - <emphasis
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role="bold">{DNAT</emphasis>|<emphasis
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role="bold">SNAT}[:{P|O|T}</emphasis>]</term>
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<listitem>
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<para>Must be DNAT or SNAT; beginning with Shorewall 4.4.23, may be
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optionally followed by :P, :O or :T to perform <firstterm>stateless
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NAT</firstterm>. Stateless NAT requires <firstterm>Rawpost Table
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support</firstterm> in your kernel and iptables (see the output of
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<command>shorewall show capabilities</command>).</para>
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<para>If DNAT or DNAT:P, traffic entering INTERFACE and addressed to
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NET1 has its destination address rewritten to the corresponding
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address in NET2.</para>
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<para>If SNAT or SNAT:T, traffic leaving INTERFACE with a source
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address in NET1 has it's source address rewritten to the
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corresponding address in NET2.</para>
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<para>If DNAT:O, traffic originating on the firewall and leaving via
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INTERFACE and addressed to NET1 has its destination address
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rewritten to the corresponding address in NET2.</para>
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<para>If DNAT:P, traffic entering via INTERFACE and addressed to
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NET1 has its destination address rewritten to the corresponding
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address in NET2.</para>
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<para>If SNAT:P, traffic entering via INTERFACE with a destination
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address in NET1 has it's source address rewritten to the
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corresponding address in NET2.</para>
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<para>If SNAT:O, traffic originating on the firewall and leaving via
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INTERFACE with a source address in NET1 has it's source address
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rewritten to the corresponding address in NET2.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">NET1</emphasis> -
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<emphasis>network-address</emphasis></term>
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<listitem>
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<para>Network in CIDR format (e.g., 192.168.1.0/24). Beginning with
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Shorewall 4.4.24, <ulink
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url="shorewall-exclusion.html">exclusion</ulink> is
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supported.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">INTERFACE</emphasis> -
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<emphasis>interface</emphasis></term>
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<listitem>
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<para>The name of a network interface. The interface must be defined
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in <ulink
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url="shorewall-interfaces.html">shorewall-interfaces</ulink>(5).
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Shorewall allows loose matches to wildcard entries in <ulink
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url="shorewall-interfaces.html">shorewall-interfaces</ulink>(5). For
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example, <filename class="devicefile">ppp0</filename> in this file
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will match a <ulink
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url="shorewall-interfaces.html">shorewall-interfaces</ulink>(8)
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entry that defines <filename
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class="devicefile">ppp+</filename>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">NET2</emphasis> -
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<emphasis>network-address</emphasis></term>
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<listitem>
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<para>Network in CIDR format</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">NET3 (Optional)</emphasis> -
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<emphasis>network-address</emphasis></term>
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<listitem>
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<para>Added in Shorewall 4.4.11. If specified, qualifies INTERFACE.
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It specifies a SOURCE network for DNAT rules and a DESTINATON
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network for SNAT rules.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">PROTO</emphasis> -
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<emphasis>protocol-number-or-name</emphasis></term>
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<listitem>
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<para>Optional -- added in Shorewall 4.4.23.2. Only packets
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specifying this protocol will have their IP header modified.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">DEST PORT(S) (dport)</emphasis> -
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<emphasis>port-number-or-name-list</emphasis></term>
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<listitem>
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<para>Optional - added in Shorewall 4.4.23.2. Destination Ports. A
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comma-separated list of Port names (from services(5)),
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<emphasis>port number</emphasis>s or <emphasis>port
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range</emphasis>s; if the protocol is <emphasis
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role="bold">icmp</emphasis>, this column is interpreted as the
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destination icmp-type(s). ICMP types may be specified as a numeric
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type, a numberic type and code separated by a slash (e.g., 3/4), or
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a typename. See <ulink
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url="http://www.shorewall.net/configuration_file_basics.htm#ICMP">http://www.shorewall.net/configuration_file_basics.htm#ICMP</ulink>.</para>
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<para>If the protocol is <emphasis role="bold">ipp2p</emphasis>,
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this column is interpreted as an ipp2p option without the leading
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"--" (example <emphasis role="bold">bit</emphasis> for bit-torrent).
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If no PORT is given, <emphasis role="bold">ipp2p</emphasis> is
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assumed.</para>
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<para>An entry in this field requires that the PROTO column specify
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icmp (1), tcp (6), udp (17), sctp (132) or udplite (136). Use '-' if
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any of the following field is supplied.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">SOURCE PORT(S) (sport)</emphasis> -
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<emphasis>port-number-or-name-list</emphasis></term>
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<listitem>
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<para>Optional -- added in Shorewall 4.4.23.2. Source port(s). If
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omitted, any source port is acceptable. Specified as a
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comma-separated list of port names, port numbers or port
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ranges.</para>
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<para>An entry in this field requires that the PROTO column specify
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tcp (6), udp (17), sctp (132) or udplite (136). Use '-' if any of
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the following fields is supplied.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>FILES</title>
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<para>/etc/shorewall/netmap</para>
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</refsect1>
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<refsect1>
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<title>See ALSO</title>
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<para><ulink
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url="http://shorewall.net/netmap.html">http://shorewall.net/netmap.html</ulink></para>
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<para><ulink
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url="http://shorewall.net/configuration_file_basics.htm#Pairs">http://shorewall.net/configuration_file_basics.htm#Pairs</ulink></para>
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<para>shorewall(8), shorewall-accounting(5), shorewall-actions(5),
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shorewall-blacklist(5), shorewall-hosts(5), shorewall_interfaces(5),
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shorewall-ipsets(5), shorewall-maclist(5), shorewall-masq(5),
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shorewall-nat(5), shorewall-params(5), shorewall-policy(5),
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shorewall-providers(5), shorewall-proxyarp(5), shorewall-rtrules(5),
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shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5),
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shorewall-secmarks(5), shorewall-tcclasses(5), shorewall-tcdevices(5),
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shorewall-tcrules(5), shorewall-tos(5), shorewall-tunnels(5),
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shorewall-zones(5)</para>
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</refsect1>
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</refentry>
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