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Port Forwarding of Industrial Cellular Routers USR-G806

Port Forwarding of Industrial Cellular Routers USR-G806


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1.Port forwarding(Forward)

Port forwarding allows remote computers on the Internet to connect to a specific computer or service within the private LAN.


1.1  Functional Description

Port Settings Page 1

Figure 1 Port Settings Page 1


After setting the forwarding rules, you need to click the Add button on the right, and this rule will appear in the rules bar.

Port Settings Page 2

Figure 2 Port Settings Page 2



Then click the "Save & Apply" button in the lower right corner to make the settings take effect.

The above settings, is the router's own web server. If we want to access a device in the LAN from the external network, then we need to set the mapping from the external network to the internal network. For example, set the external network port to 81, the internal network IP to, and the internal network port to 80.

When we access port 81 from the WAN port, the access request will be transferred to


1.2 Port Mapping on 4G Interfaces

The software and hardware parameters required for the test are as follows.

Table 1 Port Mapping Parameter Table

Use environment




4G industrial router

External access to devices under industrial routers(PC)

SIM card

Dedicated APN card(fixed IP:

PC side


PC listening port


Fixed first, fill in the correct APN address on the industrial router,

4G network port mapping one

Figure 3 4G network port mapping one


Then, add the corresponding port mapping,


4G network port mapping II

Figure 4 4G network port mapping II


Finally, after setting all the parameters, restart the industrial router.

After the restart, the industrial router is successfully connected. Check that the IP address obtained by the 4G interface of the router is, and the port 12129 is monitored on the PC.

4G network port mapping test

Figure 5 4G network port mapping test

You can see the debug assistant. You can receive connection requests from external clients (which can be another 4G router, build them yourself) and perform data communication.




Port mapping is to map a designated port of the WAN port address to a host of the intranet. The DMZ function maps all the ports of the WAN port address to one host, and sets the interface and port forwarding in the same interface. The port is not filled, you can,

DMZ setting

Figure 6 DMZ setting 1


Click Add and save

DMZ setting

Figure 7 DMZ setting 2


As shown in the figure, all ports of the WAN port address are mapped to the host network



Port mapping and DMZ functions cannot be used simultaneously