nginx_to_iis.conf

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    gzip_min_length     1000;
    gzip_buffers        4 8k;
    gzip_http_version   1.0;
    gzip_disable        "msie6";
    gzip_types          text/plain text/css application/json text/html application/javascript;
    gzip_vary           on;


    server {
        listen 443 ssl;

        server_name example.org;

        ssl_certificate /app/ssl/apiserver.crt;
        ssl_certificate_key /app/ssl/apiserver.key;

        location / {
            proxy_pass http://iis:9980; // second file has 9990 here
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
            gzip on;
            # set client body size to 5M #
            client_max_body_size 5M;
        }
    }

    include /etc/nginx/conf.d/*.conf;
}