When port forwarding or port range forwarding is enabled any WAN connected device can originate a conversation to LAN side connected devices when using the enabled port ranges. Also any WAN connected device can configure the router if remote router access is enabled. A Whitelist is used to limit the WAN connected devices which can use the port forwarding, port range forwarding and remote router access feature. The Whitelist feature does not affect IP conversations initiated on the LAN network.
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