Does anyone have or has had this issue?

ETH: Stratum - connecting to 'eth-us-east1.nanopool.org' <192.99.69.170> port 9999 (unsecure)
ETH: Stratum - Cannot connect to eth-us-east1.nanopool.org:9999
ETH: Stratum - Failed to connect, retry in 20 sec...

I have internet as I can remotely log in my computer or browse the internet, but I cannot mine.

Hey guys, I apologize for asking this but I am new to mining and there are far too many pages to go through to find an answer.

At the moment I am mining on Algo switch (Port 17XXX) and dual mining SIA.

What is the difference between this and Multi-algo switch mining (Port 12XXX)?

I can't seem to find where the 12xxx port numbers are. What I understand is that port 17xxx it switches between coins inside one algo and port 12xxx switches between all algos to the most profitable coin?