There is a mistake in the official Centos documentation on this page:<br />
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<a href="http://www.centos.org/docs/5/html/Virtual_Server_Administration/s2-lvs-direct-arptables-VSA.html">http://www.centos.org/docs/5/html/Virtual_Server_Administration/s2-lvs-direct-arptables-VSA.html</a> [<a href="http://www.centos.org/docs/5/html/Virtual_Server_Administration/s2-lvs-direct-arptables-VSA.html" target="_blank">^</a>]<br />
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In the command:<br />
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arptables -A OUT -d <virtual_ip> -j mangle --mangle-ip-s <real_ip><br />
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'-d' should be replaced by '-s', so the full command should look like this:<br />
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arptables -A OUT -s <virtual_ip> -j mangle --mangle-ip-s <real_ip><br />
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This line is correct in the Red Hat documentation <a href="https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Virtual_Server_Administration/s1-lvs-direct-VSA.html#s2-lvs-direct-arptables-VSA">https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Virtual_Server_Administration/s1-lvs-direct-VSA.html#s2-lvs-direct-arptables-VSA</a> [<a href="https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Virtual_Server_Administration/s1-lvs-direct-VSA.html#s2-lvs-direct-arptables-VSA" target="_blank">^</a>]
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