Also that firmware is pretty old, you might want to update to May 2019, or Dec 2018 if you must have SSH.
The reason
BitMaxz is recommending 2017 is for a reason: it was one of the last good reliable versions, before asicboost. 2018 is Asicboost enabled, pre-miner locking, thus the only other valid choice. 2019 is garbage.
Telling people to update to 2019 is the same as telling them to lock themselves out of their miners.