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Describe the need for LSM to provide failover.

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Signed-off-by: Tom Eastep <teastep@shorewall.net>
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Tom Eastep 2013-07-24 09:55:38 -07:00
parent b10a0642e1
commit 4edbad6849
1 changed files with 17 additions and 1 deletions
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18
docs/MultiISP.xml
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@ -681,7 +681,23 @@
</section>
<section>
<title>/etc/shorewall/masq and Multi-ISP</title>
<title>What an entry in the Providers File Does Not Do</title>
<para>Shorewall itself provides no mechanism for dealing with provider
links that are in the up state but not responsive. If you want
transparent failover when a link is unresponsive, you must configure all
provider interfaces as <emphasis role="bold">optional</emphasis> (<ulink
url="manpages/shorewall-interfaces.html">shorewall-interfaces(5)</ulink>)
then <link linkend="LinkMonitor">install and configure
LSM</link>.</para>
<para><ulink url="Shorewall-init.html">Shorewall-init</ulink> provides
for handling links that go hard down and are later brought back
up.</para>
</section>
<section>
<title>./etc/shorewall/masq and Multi-ISP</title>
<para>If you masquerade a local network, you will need to add masquerade
rules for both external interfaces. Referring to the diagram above, if