Use DDNS hostname to acces another equipment from outside


We use the peplink Balance30 and have internet via cellular SIM card.
We have a trimble, who is connected via LAN with the peplink.

From outside (from the office) we want acces the Trimble (who is in the field), by entering a DDNS hostname, such as

How can we do this exactly? First by ddns in cellular and then port forwarding?

Thanks in advance

You can set up ddns at the WAN configuration level in the Peplink. You will most likely set up port forwarding and an inbound ALLOW firewall rule. If the resource you want to get to is listening on port 80, you may need to change the default management port on the Balance30.