How to set up port forwarding

Background: Port forwarding is used to allow the router to forward traffic from a public IP to another interface (typically LAN). This allows a user to reach a device on the router through the public web. In addition, if multiple devices use the same port, it allows the router to assign a different source port (public port), so port 50 and 60 can be forwarded to port 80 on two different devices.

In this experiment, IR305 is directly
connected to the PC, and IR305's downlink device is IR302. The specific
connection is as follows.


1.     Go to Status Network Connections to check the static IP of device. The external IP address
for this IR305 is on its WAN interface. If you are getting a public IP from your cellular carrier, then find the public IP under cellular instead of WAN in this page. 


2.     Go
to Status
List to check the IP address of downlink device-IR302, which is


3.     Go
to Firewall
Mapping, fill in the Service Port and Internet Address.


4.     Via
the IP address of IR305: Service Port,, you can access IR302 from other
devices. For example The result is as follows. 




I've been searching for a day or so: how do you reach the modem when it's ONLY on cell, no WAN?
You would need to request a public IP from your cellular carrier. By default, no cellular carrier would give public static IP to iot devices. Without public IP, a popular method to access the router and devices behind the router would be using VPN tunnel. IR302 supports OpenVPN, IPSec, wireguard, zerotier. InHand provides a remote management portal+OpenVPN solution, called InConnect. Here is more information about the InConnect:

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