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Signed-off-by: Tom Eastep <teastep@shorewall.net>
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Tom Eastep 2014-08-10 12:15:08 -07:00
parent 0005bb697b
commit cf33bac318
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docs/MultiISP.xml
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@ -1184,63 +1184,6 @@ gateway:~ #</programlisting>Note that because we used a priority of 1000, the
<programlisting>#SOURCE DEST PROVIDER PRIORITY
lo - shorewall 1000</programlisting>
<para>Another option is to re-arrange the routing rules. Here is an
example of the routing rules produced with USE_DEFAULT_RT=Yes and
without the <option>loose</option> option being specified on the
providers:</para>
<programlisting>0: from all lookup local
1: from all fwmark 0x80000/0x80000 lookup TProxy
999: from all lookup main
1000: from 70.90.191.121 lookup ComcastB
1000: from 70.90.191.123 lookup ComcastB
1000: from 10.0.0.4 lookup ComcastC
10000: from all fwmark 0x10000/0x30000 lookup ComcastB
10001: from all fwmark 0x20000/0x30000 lookup ComcastC
32765: from all lookup balance
32767: from all lookup default
</programlisting>
<para>Note the rules with priority 1000 -- these rules are configured by
Shorewall when the providers do not have the <option>loose</option>
option. If that option is specified, the rules become:</para>
<programlisting>0: from all lookup local
1: from all fwmark 0x80000/0x80000 lookup TProxy
999: from all lookup main
10000: from all fwmark 0x10000/0x30000 lookup ComcastB
10001: from all fwmark 0x20000/0x30000 lookup ComcastC
32765: from all lookup balance
32767: from all lookup default
</programlisting>
<para>Now, if we configure the following rtrules:</para>
<programlisting>#SOURCE DEST PROVIDER PRIORITY
70.90.191.121 - ComcastB 20000
70.90.191.123 - ComcastB 20000
10.0.0.4 - ComcastC 20000</programlisting>
<para>Then the routing rules become:</para>
<programlisting>0: from all lookup local
1: from all fwmark 0x80000/0x80000 lookup TProxy
999: from all lookup main
10000: from all fwmark 0x10000/0x30000 lookup ComcastB
10001: from all fwmark 0x20000/0x30000 lookup ComcastC
20000: from 70.90.191.121 lookup ComcastB
20000: from 70.90.191.123 lookup ComcastB
20000: from 10.0.0.4 lookup ComcastC
32765: from all lookup balance
32767: from all lookup default
</programlisting>
<para>These change give marks priority over the source IP address, so
marking a packet will send it to the proscribed provider, regardless of
its source IP address. If you take this approach, be sure to include
the<link linkend="masq"> proper rules in /etc/shorewall/masq</link> to
insure that the correct source IP address is used.</para>
</section>
<section id="routes">