When setting up instack-undercloud within a virtual environment, the
default iptables rules don't allow the overcloud nodes to route
externally. This patch adds a rule and deletes a rule that allows
the overcloud nodes to route and ping external dns addresses.
When setting up instack-undercloud within a virtual environment, the default iptables rules don't allow the overcloud nodes to route externally. This patch adds a rule and deletes a rule that allows the overcloud nodes to route and ping external dns addresses.