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The JuiceFS client needs to access the JuiceFS metadata service through the external network, and needs to deploy NAT to provide external network access to the Hadoop cluster.

DESCRIPTION: The JuiceFS metadata service is deployed in the same public cloud and the same region (possibly different available zones) as the customer, and the client accesses the services in the region through an extranet. If deployed on a customer intranet, no such requirement exists.