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eth0 is used for our email traffic server. everything working fine
some time later a eth1 was added for backup purposes so this new nic sends data to another vlan for backup purposes
all of a sudden our mail server starts to fail and we found that protocols or traffic specifically 80 and 8080 is trying to traffic flow using eth1 which is only for backups as I said....
so any idea to link this traffic 80 - 8080 to only eth0?
NetworkManager is well known to screw things up when there is more than one network. I gave up on it for that reason.
What is likely happening is that the default route is set to whichever interface is brought up - which means when the second one is brought up the default route is switched, and the gateway configuration is being ignored.
One way to try is to disable the second network unless you actually need it.
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