| · | Slave servers / Master servers
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| Used to automate administration of secondary servers.
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| When you create a new primary zone on one server (master server), all slave servers (the "Slave servers" list) will be notified that there is now a new zone available.
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| When a slave server receives such a notification, it first checks its master list (those listed in "Master server") to validate the master, then requests update information and creates the zone (as secondary).
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| A Simple DNS Plus server can act as both master (primary zones) and slave (secondary zones) at the same time, and can have multiple masters and slaves.
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| NOTE: This functionality is unique to Simple DNS Plus, and is not currently supported by other DNS server implementation, so both master and slave must be running Simple DNS Plus.
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