D-Link DVA-2800 User Manual page 66

Section 4 - Configuration
NAT Loopback: If you Select On to enable NAT Loopback. This feature allows you to
access LAN clients, such as servers, using the router's public IP address
and applies normal port-forwarding and filter rules. The default and
recommended setting is Off.
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D-Link DVA-2800 User Manual
Virtual Server (Cont)
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