Proxy reverse nginx

Fuente

https://www.howtoforge.com/nginx-upstream-sent-too-big-header-while-reading-response-header-from-upstream

upstream ins_stream8723 {
    server 127.0.0.1:9003 fail_timeout=0;
}

server {
    listen 80;
    listen [::]:80;
    server_name alimentacionsaludable.ins.gob.pe;
    return 301 https://alimentacionsaludable.ins.gob.pe$request_uri;
}


server {

   listen 443 ssl;
    client_max_body_size 1G;
    ssl_certificate "/etc/nginx/ssl/2020/ServerCertificate.crt";
    ssl_certificate_key "/etc/nginx/ssl/2020/private.key";
    ssl_session_cache shared:SSL:1m;
    ssl_session_timeout  10m;
    ssl_ciphers "EECDH+ECDSA+AESGCM EECDH+aRSA+AESGCM EECDH+ECDSA+SHA384 EECDH+ECDSA+SHA256 EECDH+aRSA+SHA384 EECDH+aRSA+SHA256 EECDH+aRSA+RC4 EECDH EDH+aRSA RC4 !aNULL !eNULL !LOW !3DES !MD5 !EXP !PSK !SRP !DSS !RC4";
    ssl_prefer_server_ciphers on;
    ssl_protocols TLSv1.2 TLSv1.1 TLSv1;

    server_name alimentacionsaludable.ins.gob.pe;
    #server_name ec2-52-32-196-139.us-west-2.compute.amazonaws.com;

    access_log /var/log/ins-nginx-access-alimentacionsaludable.log;
    error_log /var/log/ins-nginx-error-alimentacionsaludable.log;

    location / {
        proxy_buffer_size   128k;
        proxy_buffers   4 256k;
        proxy_busy_buffers_size   256k;    
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
        proxy_redirect off;
        proxy_read_timeout 120;
        proxy_connect_timeout 120;
        proxy_pass http://ins_stream8723;
    }
    location ~ /xmlrpc.php {
        deny all;
    }
    location ~ ^/(xmlrpc\.php) {
        deny all;
    }
}