HOWTO:ArpFlux

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A Simple Fix That May Work

If all three network interfaces are on different IP networks (such as 10.x.x.x, 172.16.x.x, 192.168.x.x) then executing the following will work:

sysctl -w net.ipv4.conf.all.arp_filter=1

However, if they are all on the same IP network, which is the case here, then this won't achieve the desired results.

A More Effective Solution

The following can be added to your /etc/sysctl.conf file once you've tested it.

sysctl -w net.ipv4.conf.all.arp_ignore=1
sysctl -w net.ipv4.conf.all.arp_announce=2
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