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Correct highlighting in port forwarding addition

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Tom Eastep 2009-05-23 07:43:37 -07:00
parent 94c28b7e2c
commit dd34b816fe
1 changed files with 41 additions and 0 deletions
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docs/MultiISP.xml
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@ -780,6 +780,47 @@ eth1 0.0.0.0/0 130.252.99.27</programlisting>
2 $FW 0.0.0.0/0 tcp 25</programlisting>
</section>
<section id="PortForwarding">
<title>Port Forwarding</title>
<para>Shorewall provides considerable flexibility for port forwarding in
a multi-ISP environment.</para>
<para>Normal port forwarding rules such as the following will forward
from both providers.</para>
<para><filename>/etc/shorewall/rules</filename>:</para>
<programlisting>#ACTION SOURCE DEST PROTO DEST PORT(S) SOURCE ORIGINAL
# PORTS(S) DEST
DNAT net loc:192.168.1.3 tcp 25</programlisting>
<para>Continuing the above example, to forward only connection requests
from ISP 1, you can either:</para>
<orderedlist>
<listitem>
<para>Qualify the SOURCE by ISP 1's interface:</para>
<programlisting>#ACTION SOURCE DEST PROTO DEST PORT(S) SOURCE ORIGINAL
# PORTS(S) DEST
DNAT net<emphasis role="bold">:eth0</emphasis> loc:192.168.1.3 tcp 25</programlisting>
<para>or</para>
</listitem>
<listitem>
<para>Specify the IP address of ISP 1 in the ORIGINAL DEST
column:</para>
<programlisting>#ACTION SOURCE DEST PROTO DEST PORT(S) SOURCE ORIGINAL
# PORTS(S) DEST
DNAT net loc:192.168.1.3 tcp 25 <emphasis
role="bold">- 206.124.146.176</emphasis></programlisting>
</listitem>
</orderedlist>
</section>
<section id="morethan2">
<title>More than 2 Providers</title>