Doesn’t change anything.
There is no good reason an outside entity should have any means of controlling a blast furnace without being in the building.
Nothing on the internet is truly secure or ever will be.
Most water systems across the country are now monitored and controllable via the internet. Kinda like dominos, ready to fall.
I’d guess that the intention was a control scheme that allows an outsider to view what’s happening. Orderly shutdown should ALWAYS be in the hands of ONLY the locals, and that system should be isolated from outside view.