Port Mapping

The external network can access the port mapped to the intranet machine through the IP address or domain name, and access the internal PC through the external network.

Add New Port Mapping

Enable Rule
Click the check box to enable this rule

Description
The name of the rule to be mapped, preferably named according to the purpose.

WAN Interface
Select the mapped port and use the external network interface by default.

Protocol
The protocol on which the mapping is based on TCP, UDP, TCP+UDP, selected according to the service type. If you don’t know, please choose TCP+UDP. If you know exactly whether it is TCP or UDP, you should avoid selecting “TCP+UDP”, which can effectively reduce resource consumption.

External Port
Port accessed externally

Internal Port
The port on which the internal computer provides this service. The external port and internal port can be inconsistent.

NAT Loopback
After turning on, the intranet client or terminal can access the intranet server by using the public IP address of the routed external network interface. In general, if it is not necessary, please do not enable it to avoid unnecessary consumption of router resources.

Example:

Assume configured dynamic DNS, such as ezenos.f3322.org, and the external port is set to 8888, the internal Web server port is 80, and the IP address is 192.168.44.222.

To access the Web server from the external network, input http://ezenos.f3322.org:8888 in the address bar of the browser, when access from the intranet network, input http://192.168.44.222/ in the address bar.

If “NAT Loopback” is enabled, the intranet computer can also access the intranet Web server through http://ezenos.f3322.org:8888.

Add One-to-one NAT Rules

The one-to-one NAT rule allows the user to establish a conversion rule between the internal address and the external address. And use this rule to transform the address for the forwarded message.

The rule is used to perform address translation on the forwarded packet. An external network IP completely maps an intranet PC.

Output NAT

Manage and display outbound NAT rules in this section. This function can translate some IP or network segments of the intranet into the specified external network IP.

For example, in some external network lines, the operator provides two public network IP addresses A/B. One public network IP is configured as the external network interface IP A, and the other external network IP can use the outbound NAT rules translate the internal networks IP into IP B. It can be applied in multiple Internet cafes intranet or relatively independent LAN merge scenarios.

This function can also be used to complete the uplink shunt configuration.

Step 1 – Select WAN as the mainline.
Step 2 – Configure uplink shunt, such as uplink use WAN1, downlink use WAN2.

DMZ Setting

The DMZ feature allows network devices (PCs or servers, etc.) to be fully exposed to the network so that external devices can easily access them. This function is typically for specific services such as games, web servers or video conferencing.

Route Output NAT

In some areas, the router’s external network port uses a private network address, and the internal network is configured with a public network address for Internet access. Thus the router must perform the [routing mode NAT] configuration if it wants to access the Internet.

This feature is for using in the conditions when the given public network address is not enough. You can use the private network IP segment to expand the Internet.