First
Give your miner a static I.P
Open I.p ... then Firewall
Click the blue plus to add a firewall rule
In the chain box select foward
Destination will be your miners i.p
Protocol will be tcp
in the port box enter 44158
Go to te action tab and select accept
Apply and Select Ok
Make sure you can see traffic being fowarded
Log into your miner via bluetooth and check wether it is being natted and whether inbound and Out BOUND connections are ok.
Keep in mind this is the fastest and most accurate way to know whether it is working. The helium app does not update fast enough to be used for troubleshooting nat.