mirror of
https://gitlab.com/shorewall/code.git
synced 2024-11-27 10:03:41 +01:00
091b26acee
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@4893 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
124 lines
4.2 KiB
XML
124 lines
4.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<refentry>
|
|
<refmeta>
|
|
<refentrytitle>shorewall-nat</refentrytitle>
|
|
|
|
<manvolnum>5</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>nat</refname>
|
|
|
|
<refpurpose>Shorewall one-to-one NAT file</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<cmdsynopsis>
|
|
<command>/etc/shorewall/nat</command>
|
|
</cmdsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para> This file is used to define one-to-one Network Address Translation
|
|
(NAT).</para>
|
|
|
|
<warning>
|
|
<para>If all you want to do is simple port forwarding, do NOT use this
|
|
file. See http://www.shorewall.net/FAQ.htm#faq1. Also, in most cases,
|
|
Proxy ARP is a better solution that one-to-one NAT.</para>
|
|
</warning>
|
|
|
|
<para> The columns in the file are as follows.</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><emphasis role="bold">EXTERNAL</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>External IP Address - this should NOT be the primary IP
|
|
address of the interface named in the next column and must not be a
|
|
DNS Name.</para>
|
|
|
|
<para>If you put COMMENT in this column, the rest of the line will
|
|
be attached as a comment to the Netfilter rule(s) generated by the
|
|
following entries in the file. The comment will appear delimited by
|
|
"/* ... */" in the output of "shorewall show nat"</para>
|
|
|
|
<para>To stop the comment from being attached to further rules,
|
|
simply include COMMENT on a line by itself. </para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">INTERFACE</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>Interface that has the <emphasis
|
|
role="bold">EXTERNAL</emphasis> address. If ADD_IP_ALIASES=Yes in
|
|
shorewall.conf(5), Shorewall will automatically add the EXTERNAL
|
|
address to this interface. Also if ADD_IP_ALIASES=Yes, you may
|
|
follow the interface name with ":" and a digit to indicate that you
|
|
want Shorewall to add the alias with this name (e.g., "eth0:0").
|
|
That allows you to see the alias with ifconfig. <emphasis
|
|
role="bold">That is the only thing that this name is good for -- you
|
|
cannot use it anwhere else in your Shorewall
|
|
configuration.</emphasis></para>
|
|
|
|
<para>If you want to override ADD_IP_ALIASES=Yes for a particular
|
|
entry, follow the interface name with ":" and no digit (e.g.,
|
|
"eth0:").</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">INTERNAL</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>Internal Address (must not be a DNS Name).</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">ALL INTERFACES</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>If Yes or yes, NAT will be effective from all hosts. If No or
|
|
no (or left empty) then NAT will be effective only through the
|
|
interface named in the <emphasis role="bold">INTERFACE</emphasis>
|
|
column.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">LOCAL</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>If <emphasis role="bold">Yes</emphasis> or <emphasis
|
|
role="bold">yes</emphasis>, NAT will be effective from the firewall
|
|
system</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>FILES</title>
|
|
|
|
<para>/etc/shorewall/nat</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See ALSO</title>
|
|
|
|
<para>shorewall(8), shorewall-accounting(5), shorewall-actions(5),
|
|
shorewall-blacklist(5), shorewall-hosts(5), shorewall-interfaces(5),
|
|
shorewall-maclist(5), shorewall-masq(5), shorewall-netmap(5),
|
|
shorewall-params(5), shorewall-policy(5), shorewall-providers(5),
|
|
shorewall-proxyarp(5), shorewall-route_routes(5),
|
|
shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5),
|
|
shorewall-tcclasses(5), shorewall-tcdevices(5), shorewall-tcrules(5),
|
|
shorewall-tos(5), shorewall-tunnels(5), shorewall-zones(5)</para>
|
|
</refsect1>
|
|
</refentry> |