Nat Forwarding; Port Forwarding - TP-Link TL-WR820N User Manual

Chapter 4
• AP Isolation - This function isolates all connected wireless stations so that wireless
stations cannot access each other through WLAN.
• Beacon Interval - Enter a value between 40-1000 milliseconds for Beacon Interval
here. Beacon Interval value determines the time interval of the beacons. The beacons
are the packets sent by the router to synchronize a wireless network. The default
value is 100.
• RTS Threshold - Here you can specify the RTS (Request to Send) Threshold. If the
packet is larger than the specified RTS Threshold size, the router will send RTS frames
to a particular receiving station and negotiate the sending of a data frame. The default
value is 2346.
• DTIM Interval - This value determines the interval of the Delivery Traffic Indication
Message (DTIM). A DTIM field is a countdown field informing clients of the next window
for listening to broadcast and multicast messages. When the router has buffered
broadcast or multicast messages for associated clients, it sends the next DTIM with
a DTIM Interval value. You can specify the value between 1-255 Beacon Intervals. The
default value is 1, which indicates the DTIM Interval is the same as Beacon Interval.
• Group Key Update Period
time interval for the encryption key automatic renewal. The default value is 0, meaning
no key renewal.
4 4

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 Port Forwarding, Port Triggering, UPNP
and DMZ.
4 4 1

Port Forwarding

When you build up a server in the local network and want to share it on the internet, Port
Forwarding can realize the service and provide it to internet users. At the same time
Port Forwarding can keep the local network safe as other services are still invisible from
the internet.
Configure the Router in Wireless Router Mode
- Enter a number of seconds (minimum 30) to control the
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