edit: I googled it and found is I wonder why it wont connect to port 33357 for the dev fee I didnt try it on my setting but will
You should ask nicehash about it.
I'll shoot them a email if you have 33357 for dev fee and I have 3357 both ports are wright it has to be on there end
I remember reading something about having to contact them if you have x amount of miners connecting to a single port. Since many use this miner. I'm sure it's being banned by nicehash. Just a thought.