I have a host with automate.nsautomate.com.au which successfully installed a certificate with LE, however when I browse to it, it appears unsecure. Ive verified the paths are correct in my NGINX files for the certs. Any suggestions?
From the public Internet, these servers have the same address (121.200.15.236). You must have some kind of router or firewall that is forwarding port 80 and port 443 to one of the private IP addresses—but not to the other. Therefore, one of your servers—but not the other—always receives all of the inbound connections from the public Internet.
It's difficult to share a public IP address this way unless your router or firewall device performs application-layer reverse proxying or load balancing.