Nat Forwarding; Translate Address And Port By Alg - TP-Link TL-WR850N User Manual

Chapter 4
Request to Send frames to a particular receiving station and negotiates the sending
of a data frame, or else the packet will be sent immediately.
• DTIM Interval: Enter a value between 1 and 255 to determine the interval of the
Delivery Traffic Indication Message (DTIM). 1 indicates the DTIM Interval is the same
as Beacon Interval.
• Group Key Update Period:
for the encryption key automatic renewal. The default is 0, indicating no key renewal.
• WMM: This feature guarantees the packets with high-priority messages being
transmitted preferentially. WMM is enabled compulsively under 802.11n or 802.11ac
mode. It is strongly recommended to enable WMM.
• Short GI: This feature is enabled by default and recommended to increase the data
capacity by reducing the Guard Interval (GI) time.
• AP Isolation: Select this check box to enable the AP Isolation feature that allows you
to confine and restrict all wireless devices on your network from interacting with each
other, but still able to access the Internet. AP isolation is disabled by default.
• WDS Bridging: Select this check box to enable the WDS (Wireless Distribution
System) Bridging feature to allow the router to bridge with another access point (AP)
in a wireless local area network (WLAN).
4 5

NAT Forwarding

The router's NAT (Network Address Translation) feature makes the devices on the LAN
use the same public IP address to communicate on the internet, which protects the
local network by hiding IP addresses of the devices. However, it also brings about the
problem that external hosts cannot initiatively communicate with the specified devices
in the local network.
With the forwarding feature, the router can traverse the isolation of NAT so that clients
on the internet can reach devices on the LAN and realize some specific functions.
The 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.
4 5 1

Translate Address and Port by ALG

ALG (Application Layer Gateway) allows customized NAT (Network Address Translation)
traversal filters to be plugged into the gateway to support address and port translation
for certain application layer "control/data" protocols: FTP, TFTP, H323 etc. Enabling ALG
is recommended.
Configure the Router in Wireless Router Mode
Enter the number of seconds to control the time interval
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