magento use nginx reverse proxy protection

nginx_domain.conf

proxy_cache_path  /var/nginx/cache  levels=1:2    keys_zone=STATIC:10m
    inactive=24h  max_size=1g;
limit_req_zone $binary_remote_addr zone=clientlimit:10m rate=5r/s;
limit_conn_zone $binary_remote_addr zone=name:10m;

server {
    listen 80;
    server_name _;
    set $do_not_cache "0";
    set $bypass "0";
    set $block "2";
    if ( $request_method !~ ^(GET|HEAD)$ ) {
	set $do_not_cache "1";
    }

#    if ($http_cookie ~* "frontend_cid|frontend|sid|adminhtml") {
#	set $block 3;
#    }

    location /customer/account/createpost/ {

	if ($http_cookie ~* "frontend_cid|frontend|sid|adminhtml") {
	   return 404;
        }
        proxy_pass http://127.0.0.1:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

    }

    location ~* ^.+.(jpg|jpeg|gif|css|png|js|ico|html|xml|txt|wof)$ {
        access_log        off;
        expires           max;
        proxy_pass http://127.0.0.1:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
	proxy_cache		STATIC;
        proxy_cache_valid      200  1d;
        proxy_cache_use_stale  error timeout invalid_header updating
                               http_500 http_502 http_503 http_504;
        proxy_cache_bypass $bypass $do_not_cache;
        proxy_no_cache $do_not_cache;

    }

    location / {
	limit_conn name 1;
	limit_req zone=clientlimit burst=5;
	limit_rate 5m;
        proxy_pass http://127.0.0.1:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
	proxy_cache             STATIC;
    	proxy_cache_valid      200  1d;
        proxy_cache_use_stale  error timeout invalid_header updating
                               http_500 http_502 http_503 http_504;
	proxy_cache_bypass $bypass $do_not_cache;
	proxy_no_cache $do_not_cache;
	}
}