Try ssl://172.65.218.238:5555 (which is IP of us1.ethermine.org).
I attempted this. It was unsuccessful.
Also, I don't believe is has anything to do with changing pools or servers. The reason I say this is because I took the mining rig to a different location, with a different ISP, Router, ect and it functioned perfectly without the connection being forcibly closed by remote host.