How to force ssl/tls on nginx on a single port

Question

I know how to redirect all http request on nginx to https, but if I am only running nginx on a non-standard port (9575) then how can I reject any connections that do not use SSL/TLS?

Answer 1

According to this answer, this should work:

server {
        listen 9575 ssl;
        error_page 497 https://$host:$server_port$request_uri;
}