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This adds experimental support for automatic firewalling. Initially, we
don't know the other hosts (until they are exported and collected) so we
start with an blank firewall to all hosts. After hosts start checking
in, we start only allowing specify host ips. For the volume building, we
can't predict (AFAICT) which ports will be used until after the volume
is started, so we initially allow all ports inbound, until the fact gets
the data from the started volume and uses those specific ports. This
naturally takes multiple puppet runs to complete.
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