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I've got an openstack instance (all in one node) and want to redirect incoming traffic on some port from the host to one of the instance.

Openstack Nova set up a whole bunch of iptables rules. How can I properly configure my box so that my custom rules get somehow merged with Nova rules ?

I know I could iptables-save the nova rules, patch them and then iptables-restore them, but this would somehow break separation of matters between Openstack and the rest of the system.

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Give the instance its own IP address, like you're meant to. – Michael Hampton Feb 25 '13 at 21:49
I just have a single public IP for that server. – rcomblen Feb 25 '13 at 22:05
up vote 2 down vote accepted

If your goal is to provide a firewall to public address ranges in addition to the security controls that OpenStack provides, I recommend placing a firewall at the edge of your network beyond the perimeter of OpenStack.

Injecting IPTables rules into OpenStack could be done in the past with nova-network, but it was unsafe at best. Today with quantum it is even more inadvisable.

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