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shorewall_code/Shorewall/manpages/shorewall-rtrules.xml

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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"
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
<refentry>
<refmeta>
<refentrytitle>shorewall-rtrules</refentrytitle>
<manvolnum>5</manvolnum>
<refmiscinfo>Configuration Files</refmiscinfo>
</refmeta>
<refnamediv>
<refname>rtrules</refname>
<refpurpose>Shorewall Routing Rules file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>/etc/shorewall/rtrules</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>Entries in this file cause traffic to be routed to one of the
providers listed in <ulink
url="/manpages/shorewall-providers.html">shorewall-providers</ulink>(5).</para>
<para>The columns in the file are as follows.</para>
<variablelist>
<varlistentry>
<term><emphasis role="bold">SOURCE</emphasis> (Optional) - {<emphasis
role="bold">-</emphasis>|[&amp;]<emphasis>interface</emphasis>|<emphasis>address</emphasis>|<emphasis>interface</emphasis><firstterm>:</firstterm><emphasis>address</emphasis>}</term>
<listitem>
<para>An ip <emphasis>address</emphasis> (network or host) that
matches the source IP address in a packet. May also be specified as
an <emphasis>interface</emphasis> name optionally followed by ":"
and an address. If the device <emphasis role="bold">lo</emphasis> is
specified, the packet must originate from the firewall
itself.</para>
<para>Beginning with Shorewall 4.5.0, you may specify
&amp;<replaceable>interface</replaceable> in this column to indicate
that the source is the primary IP address of the named
interface.</para>
<para>Beginning with Shorewall 4.6.8, you may specify a
comma-separated list of addresses in this column.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">DEST</emphasis> (Optional) - {<emphasis
role="bold">-</emphasis>|<emphasis>address</emphasis>}</term>
<listitem>
<para>An ip address (network or host) that matches the destination
IP address in a packet.</para>
<para>If you choose to omit either <emphasis
role="bold">SOURCE</emphasis> or <emphasis
role="bold">DEST</emphasis>, place "-" in that column. Note that you
may not omit both <emphasis role="bold">SOURCE</emphasis> and
<emphasis role="bold">DEST</emphasis>.</para>
<para>Beginning with Shorewall 4.6.8, you may specify a
comma-separated list of addresses in this column.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">PROVIDER</emphasis> -
{<emphasis>provider-name</emphasis>|<emphasis>provider-number</emphasis>|<emphasis
role="bold">main</emphasis>}</term>
<listitem>
<para>The provider to route the traffic through. May be expressed
either as the provider name or the provider number. May also be
<emphasis role="bold">main</emphasis> or 254 for the main routing
table. This can be used in combination with VPN tunnels, see example
2 below.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">PRIORITY</emphasis> -
<emphasis>priority</emphasis><emphasis
role="bold">[!]</emphasis></term>
<listitem>
<para>The rule's numeric <emphasis>priority</emphasis> which
determines the order in which the rules are processed. Rules with
equal priority are applied in the order in which they appear in the
file.</para>
<variablelist>
<varlistentry>
<term>1000-1999</term>
<listitem>
<para>Before Shorewall-generated 'MARK' rules</para>
</listitem>
</varlistentry>
<varlistentry>
<term>11000-11999</term>
<listitem>
<para>After 'MARK' rules but before Shorewall-generated rules
for ISP interfaces.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>26000-26999</term>
<listitem>
<para>After ISP interface rules but before 'default'
rule.</para>
</listitem>
</varlistentry>
</variablelist>
<para>Beginning with Shorewall 5.0.2, the priority may be followed
optionally by an exclaimation mark ("!"). This causes the rule to
remain in place if the interface is disabled.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">MARK -
{-|<replaceable>mark</replaceable>[/<replaceable>mask</replaceable>]}</emphasis></term>
<listitem>
<para>Optional -- added in Shorewall 4.4.25. For this rule to be
applied to a packet, the packet's mark value must match the
<replaceable>mark</replaceable> when logically anded with the
<replaceable>mask</replaceable>. If a
<replaceable>mask</replaceable> is not supplied, Shorewall supplies
a suitable provider mask.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<variablelist>
<varlistentry>
<term>Example 1:</term>
<listitem>
<para>You want all traffic coming in on eth1 to be routed to the
ISP1 provider.</para>
<programlisting> #SOURCE DEST PROVIDER PRIORITY MASK
eth1 - ISP1 1000
</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term>Example 2:</term>
<listitem>
<para>You use OpenVPN (routed setup /tunX) in combination with
multiple providers. In this case you have to set up a rule to ensure
that the OpenVPN traffic is routed back through the tunX
interface(s) rather than through any of the providers. 10.8.0.0/24
is the subnet chosen in your OpenVPN configuration (server 10.8.0.0
255.255.255.0).</para>
<programlisting> #SOURCE DEST PROVIDER PRIORITY MASK
- 10.8.0.0/24 main 1000
</programlisting>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>FILES</title>
<para>/etc/shorewall/rtrules</para>
</refsect1>
<refsect1>
<title>See ALSO</title>
<para><ulink
url="/MultiISP.html">http://www.shorewall.net/MultiISP.html</ulink></para>
<para><ulink
url="/configuration_file_basics.htm#Pairs">http://www.shorewall.net/configuration_file_basics.htm#Pairs</ulink></para>
<para>shorewall(8), shorewall-accounting(5), shorewall-actions(5),
shorewall-blacklist(5), shorewall-hosts(5), shorewall_interfaces(5),
shorewall-ipsets(5), shorewall-maclist(5), shorewall-masq(5),
shorewall-nat(5), shorewall-netmap(5), shorewall-params(5),
shorewall-policy(5), shorewall-providers(5), shorewall-proxyarp(5),
shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5),
shorewall-secmarks(5), shorewall-tcclasses(5), shorewall-tcdevices(5),
shorewall-mangle(5), shorewall-tos(5), shorewall-tunnels(5),
shorewall-zones(5)</para>
</refsect1>
2010-07-19 23:45:05 +02:00
</refentry>