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Add note about dynamic IP addresses to the Multi-ISP doc

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@3739 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep 2006-03-27 16:35:32 +00:00
parent 5575c75a99
commit f7219371f5
1 changed files with 18 additions and 1 deletions
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19
docs/MultiISP.xml
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@ -15,7 +15,7 @@
</author> </author>
</authorgroup> </authorgroup>
<pubdate>2006-02-26</pubdate> <pubdate>2006-03-27</pubdate>
<copyright> <copyright>
<year>2005</year> <year>2005</year>
@ -438,6 +438,23 @@ net net DROP</programlisting>
eth0 130.252.99.27 206.124.146.176 eth0 130.252.99.27 206.124.146.176
eth1 206.124.146.176 130.252.99.27</programlisting> eth1 206.124.146.176 130.252.99.27</programlisting>
<note>
<para>If you have a Dynamic IP address on either of the interfaces,
you can use shell variables to construct the above rules. For example,
if <filename class="devicefile">eth0</filename> had a dynamic IP
address, then:</para>
<para><filename>/etc/shorewall/params</filename>:</para>
<programlisting>ETH0_IP=$(find_first_interface_address eth0)</programlisting>
<para>/etc/shorewall/masq:</para>
<programlisting>#INTERFACE SUBNET ADDRESS
eth0 130.252.99.27 $ETH0_IP
eth1 $ETH0_IP 130.252.99.27</programlisting>
</note>
<para>If you have masqueraded hosts, be sure to update <para>If you have masqueraded hosts, be sure to update
<filename>/etc/shorewall/masq</filename> to masquerade to both ISPs. For <filename>/etc/shorewall/masq</filename> to masquerade to both ISPs. For
example, if you masquerade all hosts connected to <filename example, if you masquerade all hosts connected to <filename