Chapter 8. Nat Forwarding - TP-Link TL-WR850N User Manual

Chapter 8
NAT Forwarding
Router's NAT (Network Address Translation) feature makes the devices in the LAN
use the same public IP address to communicate in the internet, which protects the
local network by hiding IP addresses of the devices. However, it also brings about the
problem that external host cannot initiatively communicate with the specified device in
the local network.
The router can use a forwarding feature to remove the isolation of NAT and allow external
internet hosts to initiatively communicate with the devices in the local network, thus
enabling some special features.
TP-Link router includes four forwarding rules. If two or more rules are set, the priority
of implementation from high to low is Virtual Servers, Port Triggering, UPnP and DMZ.
This chapter contains the following sections:
• Translate Address and Port by ALG
• Share Local Resources over the Internet by Virtual Server
• Open Ports Dynamically by Port Triggering
• Make Applications Free from Port Restriction by DMZ
• Make Xbox Online Games Run Smoothly by UPnP