Tp-Link TL-ER5120 [18/146] Wan mode

-13-

source IP address can be transported by NAT, whereas the packet with 20.31.76.80 as its source IP

address will be dropped.

z Non-NAT Mode

In this mode, the Router functions as the traditional Gateway and forwards the packets via routing

protocol. The Hosts in different subnets can communicate with one another via the routing rules

whereas no NAT is employed. For example: If the DMZ port of the Router is in WAN mode, the Hosts

in the subnet of DMZ port can access the servers in Internet only when the Static Router rules permit.

Note:

In Non-NAT mode, all the NAT forwarding rules will be disabled.

z Classic Mode

It's the combined mode of NAT mode and Non-NAT mode. In Classic mode, the Router will first

transport the packets which are compliant with NAT forwarding rules and then match the other packets

to the static routing rules. The matched packets will be transmitted based on the static routing rules

and the unmatched ones will be dropped. In this way, the Router can implement NAT for the packets

without blocking the packets in the different subnet of the ports.

3.1.3 WAN

3.1.3.1 WAN Mode

TL-ER5120 provides four available WAN ports. You can set the number of WAN ports on this page.

Choose the menu Network→WAN→WAN Mode to load the following page.

Figure 3-6 WAN Mode

¾ WAN Mode

WAN Ports:

Select the total number of WAN ports you prefer to use.

And the Router will adjust the physical ports

accordingly, which can be illustrated on the following