I followed a tutorial on configuring Nginx to prevent host header attacks on Meduim. I placed the statement in the /etc/nginx/nginx.conf within the http section under server however curl request is still returning data and not the expected curl: (92) HTTP/2 stream 1 was not closed cleanly: INTERNAL_ERROR (err 2).

Nginx is running on 1.16.1

Is there anything else I need to add to the conf file or elsewhere? Apologises this is all me learning the hard way!