Nginx proxy pass works for https but not http

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I want to redirect HTTP traffic and
HTTPS traffic to a backend Flask application and I have the snippet below in my
nginx.conf which works for https but not for
http

server {
listen
            80;

listen 443 ssl;
ssl_certificate
            /usr/local/nginx/server.crt;
ssl_certificate_key
            /usr/local/nginx/server.key;

location / {
 proxy_redirect
            off;
 proxy_cache off;
 proxy_pass http://127.0.0.1:5000;

            proxy_set_header Host $http_host;
 proxy_set_header X-Real-IP
            $remote_addr;

 proxy_set_header X-Forwarded-For
            $proxy_add_x_forwarded_for;
}
}

Does
anyone have any pointers? Is there something obvious in the config file snippet or did I
install Nginx
wrong?

Thanks!

Answer

I installed nginx on my Redhat16 machine from yum. After I removed the contents
of the etc/nginx/conf.d directory, everything worked as expected. It seems something in
that directory was overruling the http proxy_pass.