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All Interface Binding: Select this checkbox to implement All Interface Binding for bind the host service to all network interfaces. Deselect it if you want to choose either WAN , LAN, or a custom interface label for binding. For information about how to create interface labels for binding, see Setting IP Interfaces.
WAN: Select this checkbox to implement a WAN for the host service.
LAN: Select this checkbox to implement a LAN for the host service.
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