Re: Return 444 if https port(443) accesed via http

It won't work if you use "ssl" in the listen directive and don't define an ssl certificate and key. You'll see something like this in the error log:

"no "ssl_certificate" is defined in server listening on SSL port while SSL handshaking"

The surest way would be to create a custom error page.

Or perhaps:

server {
listen 1.1.1.1:443 ssl;
server_name abc.com;
ssl_certificate cert.pem;
ssl_certificate_key key.pem;
return 301 http://abc.com$request_uri;
}