Question about Headers IIS reverse proxy with NGINX

[killmasta93]

Hi

I was wondering if someone could shed some light on the issue im having,

Currently i have working great NGINX as reverse proxy for my IIS

Im trying to get working the Strict-Transport-Security, X-Frame-Options, X-Content-Type-Options working my NGINX but it keeps showing that its not getting applied when i check

https://securityheaders.com

#        listen 80;
   listen 443 ssl;
 server_name  sub.domain.com;

  ssl_certificate /etc/letsencrypt/live/sub.domain.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/sub.domain.com/privkey.pem;
        ssl_dhparam /etc/ssl/certs/dhparam.pem;
        ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
        ssl_session_timeout 1d;
        ssl_session_cache shared:SSL:50m;
        ssl_stapling on;
       ssl_stapling_verify on;

## security headers
# Block loading in an iFrame
add_header X-Frame-Options SAMEORIGIN;
# Enforce HTTPS
add_header Strict-Transport-Security "max-age=31536000; includeSubdomains";
# Blocks hidden malicious scripts
add_header X-Content-Type-Options nosniff;
# Stops scripts from unknown sources
add_header X-XSS-Protection "1; mode=block";
# Content security policy
add_header Content-Security-Policy "default-src 'self' https: data: 'unsafe-inline' 'unsafe-eval';" always;
# Referal policy
add_header Referrer-Policy "origin-when-cross-origin" always;
# permision policy
add_header Feature-Policy "camera 'none'; microphone 'none'; geolocation 'none'" always;
add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;

        location ~ /.well-known {
        root /var/www/letsencrypt;
        allow all;
    }
        location / {

               proxy_pass http://192.168.3.211:8096/;

#                headers setting

                proxy_set_header Host $host;

                proxy_set_header X-Real-IP $remote_addr;

                proxy_set_header X-Forwarded-For $remote_addr;

                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header X-Client-IP $remote_addr;

                }

        }

im going to assume

proxy_set_header Host $host; is what shows the header of the IIS?

Thank you