port 40 open and not sure why

So ran the shields up scan since i got a new NAS up and running and wanted to make sure I didnt see anything. For some reason port 40 responded and im not sure where or why.

I only have 1 port fwd setup (not 40) and i cant find any standard service that uses port 40. Im at a loss on how i can lock down that port or at least identify what it is used for.

Isn't it always the way..... been fighting it for hours, as soon as I post I figure it out. I changed a remote access port to 40 that I didn't need to leave open anymore.