Install SSL Free lets encrypt

sudo apt-get update
sudo apt-get install software-properties-common
sudo add-apt-repository universe
sudo add-apt-repository ppa:certbot/certbot
sudo apt-get update
sudo apt-get install certbot python-certbot-nginx

sudo certbot --nginx

sudo service nginx restart


You have to check the 60 and 442 port are open or not in the inbout and outbound area.