I could be wrong on this: I would believe your network the S4 is connected to would need to be set up for DHCP and you know the address assigned to it [whether it was assigned automatically or manually as in my case] in order to connect to your S4.
Bitmaintech is not responsible for what you do with your network set up and whether you want to connect remotely or not. They are only responsible for the unit. If the unit had problems connecting to it remotely, THEN I could see bitmaintech coming into play.
However, I honestly believe you need to set up your S4 to connect to a DHCP network NOT static in order to connect to it remotely within that network.
I'm not a network specialist. I'm just telling you how I have mine setup with my Airport Extreme Base Station from Apple.
The DHCP server issues the static IP to the S4.
Nothing wrong with 60C, I'm almost permanently at 55-60C due to a 35-40C ambient.
But it is in a shopping centre with air-con and an ambient temp of 24C, so going by your temps it being 46C (coolest board) to 51C (hottest board) seems normal. I don't think the 61C is normal at that ambient temp of 24C. It was only 1 board that was reaching high temps, not all 4. The other 3 boards were still running at around the temp they normally are. I monitor this miner several times a day so I do know what my average is for my miner.
It is currently stable with the hottest board at 51C now and hashing at 2TH.
This is a software problem. Sometimes i have it too, after power failure.
You can stop function - Stop running when temprerature is over 80℃ - only thing you need restart miner with PSU manually.
Well the first time it was running hot, it was not responding to via HTTP or SSH. It just crash and continued to run hot. So if it has crashed I'm not sure it would be able to monitor the temp and stop at 80C.