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Add footnote and proviso regarding two links from the same ISP
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@ -105,8 +105,11 @@
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<title>Overview</title>
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<para>Let's assume that a firewall is connected via two separate
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Ethernet interfaces to two different ISPs as in the following
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diagram.</para>
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Ethernet interfaces to two different ISPs.<footnote>
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<para>While we describe a setup using different ISPs in this
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article, the facility also works with two uplinks from the same
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ISP.</para>
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</footnote> as in the following diagram.</para>
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<graphic align="center" fileref="images/TwoISPs.png" valign="middle" />
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@ -1180,7 +1183,10 @@ shorewall 2 2 - eth0 192.168.1.254 track,balance=2,optional<
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<title>Gateway Monitoring and Failover</title>
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<para>There are a couple of options available for monitoring the status
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of provider links and taking action when a failure occurs.</para>
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of provider links and taking action when a failure occurs. Both of these
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options assume that each provider has a unique nexthop gateway; if two
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or more providers use the same gateway router then neither option is
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suitable.</para>
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<para>You specify the <option>optional</option> option in
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<filename>/etc/shorewall/interfaces</filename>:</para>
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