Process to port forwarding
To port forward on Peplink, find the MAC address and IP address of the device, then go to Network and Port Forwarding.
Add a service name, select Port Mapping, set the port, map to the appropriate device, and click Save and Apply Changes. Port forwarding is necessary to allow external access to specific devices.
The port will always be an instance of 9000 or above, the Map To changes depending on what device you want to access. For Peplinks and Yealinks map to 443. For Algo's and other devices use 80. You can see the Algo's for this client are all set to 9XXX and 80
Click All for Connection/IP address.
Paste the IP address of the device into the Server IP address. Click Save and then Apply Changes. 
Give the peplink a couple minutes to load and then you will be able to access the device by using HTTP:// or HTTPS://IP address of the peplink/device and the port assigned