proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP "";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Protocol "";
proxy_set_header X-Forwarded-Protocol $scheme;
proxy_set_header X-Forwarded-Proto "";
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Requested-With $http_x_requested_with;

proxy_headers_hash_max_size 512;
proxy_headers_hash_bucket_size 128;

client_body_buffer_size 128k;
proxy_connect_timeout 60;
proxy_send_timeout 300;
proxy_read_timeout 300;
proxy_buffers 32 8k;
proxy_request_buffering off;