Port forwarding for remote access

I am attempting to set up remote access so that someone else (off-site) from my workplace can access our Filemaker Pro (12.0v5) database. I have read through some instructions with Filemaker about setting up port forwarding, but it doesn’t have specific guidelines for our Peplink Balance One router. Does anyone know where I might be able to get help with this?

You can try out our user guide.

What you’re looking for is Inbound Access (Page 84).
Server here refers to your Filemaker Pro.
Service refers to the port(s) for accessing your Filemaker database.